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| .\" ======================================================================== | |
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| .IX Title "FFMPEG-BITSTREAM-FILTERS 1" | |
| .TH FFMPEG-BITSTREAM-FILTERS 1 " " " " " " | |
| .\" For nroff, turn off justification. Always turn off hyphenation; it makes | |
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| .if n .ad l | |
| .nh | |
| .SH "NAME" | |
| ffmpeg\-bitstream\-filters \- FFmpeg bitstream filters | |
| .SH "DESCRIPTION" | |
| .IX Header "DESCRIPTION" | |
| This document describes the bitstream filters provided by the | |
| libavcodec library. | |
| .PP | |
| A bitstream filter operates on the encoded stream data, and performs | |
| bitstream level modifications without performing decoding. | |
| .SH "BITSTREAM FILTERS" | |
| .IX Header "BITSTREAM FILTERS" | |
| When you configure your FFmpeg build, all the supported bitstream | |
| filters are enabled by default. You can list all available ones using | |
| the configure option \f(CW\*(C`\-\-list\-bsfs\*(C'\fR. | |
| .PP | |
| You can disable all the bitstream filters using the configure option | |
| \&\f(CW\*(C`\-\-disable\-bsfs\*(C'\fR, and selectively enable any bitstream filter using | |
| the option \f(CW\*(C`\-\-enable\-bsf=BSF\*(C'\fR, or you can disable a particular | |
| bitstream filter using the option \f(CW\*(C`\-\-disable\-bsf=BSF\*(C'\fR. | |
| .PP | |
| The option \f(CW\*(C`\-bsfs\*(C'\fR of the ff* tools will display the list of | |
| all the supported bitstream filters included in your build. | |
| .PP | |
| The ff* tools have a \-bsf option applied per stream, taking a | |
| comma-separated list of filters, whose parameters follow the filter | |
| name after a '='. | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c:v copy \-bsf:v filter1[=opt1=str1:opt2=str2][,filter2] OUTPUT | |
| .Ve | |
| .PP | |
| Below is a description of the currently available bitstream filters, | |
| with their parameters, if any. | |
| .SS "aac_adtstoasc" | |
| .IX Subsection "aac_adtstoasc" | |
| Convert \s-1MPEG\-2/4 AAC ADTS\s0 to an \s-1MPEG\-4\s0 Audio Specific Configuration | |
| bitstream. | |
| .PP | |
| This filter creates an \s-1MPEG\-4\s0 AudioSpecificConfig from an \s-1MPEG\-2/4 | |
| ADTS\s0 header and removes the \s-1ADTS\s0 header. | |
| .PP | |
| This filter is required for example when copying an \s-1AAC\s0 stream from a | |
| raw \s-1ADTS AAC\s0 or an MPEG-TS container to \s-1MP4A\-LATM,\s0 to an \s-1FLV\s0 file, or | |
| to \s-1MOV/MP4\s0 files and related formats such as 3GP or M4A. Please note | |
| that it is auto-inserted for \s-1MP4A\-LATM\s0 and \s-1MOV/MP4\s0 and related formats. | |
| .SS "av1_metadata" | |
| .IX Subsection "av1_metadata" | |
| Modify metadata embedded in an \s-1AV1\s0 stream. | |
| .IP "\fBtd\fR" 4 | |
| .IX Item "td" | |
| Insert or remove temporal delimiter OBUs in all temporal units of the | |
| stream. | |
| .RS 4 | |
| .IP "\fBinsert\fR" 4 | |
| .IX Item "insert" | |
| Insert a \s-1TD\s0 at the beginning of every \s-1TU\s0 which does not already have one. | |
| .IP "\fBremove\fR" 4 | |
| .IX Item "remove" | |
| Remove the \s-1TD\s0 from the beginning of every \s-1TU\s0 which has one. | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBcolor_primaries\fR" 4 | |
| .IX Item "color_primaries" | |
| .PD 0 | |
| .IP "\fBtransfer_characteristics\fR" 4 | |
| .IX Item "transfer_characteristics" | |
| .IP "\fBmatrix_coefficients\fR" 4 | |
| .IX Item "matrix_coefficients" | |
| .PD | |
| Set the color description fields in the stream (see \s-1AV1\s0 section 6.4.2). | |
| .IP "\fBcolor_range\fR" 4 | |
| .IX Item "color_range" | |
| Set the color range in the stream (see \s-1AV1\s0 section 6.4.2; note that | |
| this cannot be set for streams using \s-1BT.709\s0 primaries, sRGB transfer | |
| characteristic and identity (\s-1RGB\s0) matrix coefficients). | |
| .RS 4 | |
| .IP "\fBtv\fR" 4 | |
| .IX Item "tv" | |
| Limited range. | |
| .IP "\fBpc\fR" 4 | |
| .IX Item "pc" | |
| Full range. | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBchroma_sample_position\fR" 4 | |
| .IX Item "chroma_sample_position" | |
| Set the chroma sample location in the stream (see \s-1AV1\s0 section 6.4.2). | |
| This can only be set for 4:2:0 streams. | |
| .RS 4 | |
| .IP "\fBvertical\fR" 4 | |
| .IX Item "vertical" | |
| Left position (matching the default in \s-1MPEG\-2\s0 and H.264). | |
| .IP "\fBcolocated\fR" 4 | |
| .IX Item "colocated" | |
| Top-left position. | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBtick_rate\fR" 4 | |
| .IX Item "tick_rate" | |
| Set the tick rate (\fItime_scale / num_units_in_display_tick\fR) in | |
| the timing info in the sequence header. | |
| .IP "\fBnum_ticks_per_picture\fR" 4 | |
| .IX Item "num_ticks_per_picture" | |
| Set the number of ticks in each picture, to indicate that the stream | |
| has a fixed framerate. Ignored if \fBtick_rate\fR is not also set. | |
| .IP "\fBdelete_padding\fR" 4 | |
| .IX Item "delete_padding" | |
| Deletes Padding OBUs. | |
| .SS "chomp" | |
| .IX Subsection "chomp" | |
| Remove zero padding at the end of a packet. | |
| .SS "dca_core" | |
| .IX Subsection "dca_core" | |
| Extract the core from a \s-1DCA/DTS\s0 stream, dropping extensions such as | |
| DTS-HD. | |
| .SS "dump_extra" | |
| .IX Subsection "dump_extra" | |
| Add extradata to the beginning of the filtered packets except when | |
| said packets already exactly begin with the extradata that is intended | |
| to be added. | |
| .IP "\fBfreq\fR" 4 | |
| .IX Item "freq" | |
| The additional argument specifies which packets should be filtered. | |
| It accepts the values: | |
| .RS 4 | |
| .IP "\fBk\fR" 4 | |
| .IX Item "k" | |
| .PD 0 | |
| .IP "\fBkeyframe\fR" 4 | |
| .IX Item "keyframe" | |
| .PD | |
| add extradata to all key packets | |
| .IP "\fBe\fR" 4 | |
| .IX Item "e" | |
| .PD 0 | |
| .IP "\fBall\fR" 4 | |
| .IX Item "all" | |
| .PD | |
| add extradata to all packets | |
| .RE | |
| .RS 4 | |
| .RE | |
| .PP | |
| If not specified it is assumed \fBk\fR. | |
| .PP | |
| For example the following \fBffmpeg\fR command forces a global | |
| header (thus disabling individual packet headers) in the H.264 packets | |
| generated by the \f(CW\*(C`libx264\*(C'\fR encoder, but corrects them by adding | |
| the header stored in extradata to the key packets: | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-map 0 \-flags:v +global_header \-c:v libx264 \-bsf:v dump_extra out.ts | |
| .Ve | |
| .SS "dv_error_marker" | |
| .IX Subsection "dv_error_marker" | |
| Blocks in \s-1DV\s0 which are marked as damaged are replaced by blocks of the specified color. | |
| .IP "\fBcolor\fR" 4 | |
| .IX Item "color" | |
| The color to replace damaged blocks by | |
| .IP "\fBsta\fR" 4 | |
| .IX Item "sta" | |
| A 16 bit mask which specifies which of the 16 possible error status values are | |
| to be replaced by colored blocks. 0xFFFE is the default which replaces all non 0 | |
| error status values. | |
| .RS 4 | |
| .IP "\fBok\fR" 4 | |
| .IX Item "ok" | |
| No error, no concealment | |
| .IP "\fBerr\fR" 4 | |
| .IX Item "err" | |
| Error, No concealment | |
| .IP "\fBres\fR" 4 | |
| .IX Item "res" | |
| Reserved | |
| .IP "\fBnotok\fR" 4 | |
| .IX Item "notok" | |
| Error or concealment | |
| .IP "\fBnotres\fR" 4 | |
| .IX Item "notres" | |
| Not reserved | |
| .IP "\fBAa, Ba, Ca, Ab, Bb, Cb, A, B, C, a, b, erri, erru\fR" 4 | |
| .IX Item "Aa, Ba, Ca, Ab, Bb, Cb, A, B, C, a, b, erri, erru" | |
| The specific error status code | |
| .RE | |
| .RS 4 | |
| .Sp | |
| see page 44\-46 or section 5.5 of | |
| <\fBhttp://web.archive.org/web/20060927044735/http://www.smpte.org/smpte_store/standards/pdf/s314m.pdf\fR> | |
| .RE | |
| .SS "eac3_core" | |
| .IX Subsection "eac3_core" | |
| Extract the core from a E\-AC\-3 stream, dropping extra channels. | |
| .SS "extract_extradata" | |
| .IX Subsection "extract_extradata" | |
| Extract the in-band extradata. | |
| .PP | |
| Certain codecs allow the long-term headers (e.g. \s-1MPEG\-2\s0 sequence headers, | |
| or H.264/HEVC (\s-1VPS/\s0)SPS/PPS) to be transmitted either \*(L"in-band\*(R" (i.e. as a part | |
| of the bitstream containing the coded frames) or \*(L"out of band\*(R" (e.g. on the | |
| container level). This latter form is called \*(L"extradata\*(R" in FFmpeg terminology. | |
| .PP | |
| This bitstream filter detects the in-band headers and makes them available as | |
| extradata. | |
| .IP "\fBremove\fR" 4 | |
| .IX Item "remove" | |
| When this option is enabled, the long-term headers are removed from the | |
| bitstream after extraction. | |
| .SS "filter_units" | |
| .IX Subsection "filter_units" | |
| Remove units with types in or not in a given set from the stream. | |
| .IP "\fBpass_types\fR" 4 | |
| .IX Item "pass_types" | |
| List of unit types or ranges of unit types to pass through while removing | |
| all others. This is specified as a '|'\-separated list of unit type values | |
| or ranges of values with '\-'. | |
| .IP "\fBremove_types\fR" 4 | |
| .IX Item "remove_types" | |
| Identical to \fBpass_types\fR, except the units in the given set | |
| removed and all others passed through. | |
| .PP | |
| Extradata is unchanged by this transformation, but note that if the stream | |
| contains inline parameter sets then the output may be unusable if they are | |
| removed. | |
| .PP | |
| For example, to remove all non-VCL \s-1NAL\s0 units from an H.264 stream: | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c:v copy \-bsf:v \*(Aqfilter_units=pass_types=1\-5\*(Aq OUTPUT | |
| .Ve | |
| .PP | |
| To remove all AUDs, \s-1SEI\s0 and filler from an H.265 stream: | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c:v copy \-bsf:v \*(Aqfilter_units=remove_types=35|38\-40\*(Aq OUTPUT | |
| .Ve | |
| .SS "hapqa_extract" | |
| .IX Subsection "hapqa_extract" | |
| Extract Rgb or Alpha part of an \s-1HAPQA\s0 file, without recompression, in order to create an \s-1HAPQ\s0 or an HAPAlphaOnly file. | |
| .IP "\fBtexture\fR" 4 | |
| .IX Item "texture" | |
| Specifies the texture to keep. | |
| .RS 4 | |
| .IP "\fBcolor\fR" 4 | |
| .IX Item "color" | |
| .PD 0 | |
| .IP "\fBalpha\fR" 4 | |
| .IX Item "alpha" | |
| .RE | |
| .RS 4 | |
| .RE | |
| .PD | |
| .PP | |
| Convert \s-1HAPQA\s0 to \s-1HAPQ\s0 | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i hapqa_inputfile.mov \-c copy \-bsf:v hapqa_extract=texture=color \-tag:v HapY \-metadata:s:v:0 encoder="HAPQ" hapq_file.mov | |
| .Ve | |
| .PP | |
| Convert \s-1HAPQA\s0 to HAPAlphaOnly | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i hapqa_inputfile.mov \-c copy \-bsf:v hapqa_extract=texture=alpha \-tag:v HapA \-metadata:s:v:0 encoder="HAPAlpha Only" hapalphaonly_file.mov | |
| .Ve | |
| .SS "h264_metadata" | |
| .IX Subsection "h264_metadata" | |
| Modify metadata embedded in an H.264 stream. | |
| .IP "\fBaud\fR" 4 | |
| .IX Item "aud" | |
| Insert or remove \s-1AUD NAL\s0 units in all access units of the stream. | |
| .RS 4 | |
| .IP "\fBpass\fR" 4 | |
| .IX Item "pass" | |
| .PD 0 | |
| .IP "\fBinsert\fR" 4 | |
| .IX Item "insert" | |
| .IP "\fBremove\fR" 4 | |
| .IX Item "remove" | |
| .RE | |
| .RS 4 | |
| .PD | |
| .Sp | |
| Default is pass. | |
| .RE | |
| .IP "\fBsample_aspect_ratio\fR" 4 | |
| .IX Item "sample_aspect_ratio" | |
| Set the sample aspect ratio of the stream in the \s-1VUI\s0 parameters. | |
| See H.264 table E\-1. | |
| .IP "\fBoverscan_appropriate_flag\fR" 4 | |
| .IX Item "overscan_appropriate_flag" | |
| Set whether the stream is suitable for display using overscan | |
| or not (see H.264 section E.2.1). | |
| .IP "\fBvideo_format\fR" 4 | |
| .IX Item "video_format" | |
| .PD 0 | |
| .IP "\fBvideo_full_range_flag\fR" 4 | |
| .IX Item "video_full_range_flag" | |
| .PD | |
| Set the video format in the stream (see H.264 section E.2.1 and | |
| table E\-2). | |
| .IP "\fBcolour_primaries\fR" 4 | |
| .IX Item "colour_primaries" | |
| .PD 0 | |
| .IP "\fBtransfer_characteristics\fR" 4 | |
| .IX Item "transfer_characteristics" | |
| .IP "\fBmatrix_coefficients\fR" 4 | |
| .IX Item "matrix_coefficients" | |
| .PD | |
| Set the colour description in the stream (see H.264 section E.2.1 | |
| and tables E\-3, E\-4 and E\-5). | |
| .IP "\fBchroma_sample_loc_type\fR" 4 | |
| .IX Item "chroma_sample_loc_type" | |
| Set the chroma sample location in the stream (see H.264 section | |
| E.2.1 and figure E\-1). | |
| .IP "\fBtick_rate\fR" 4 | |
| .IX Item "tick_rate" | |
| Set the tick rate (time_scale / num_units_in_tick) in the \s-1VUI\s0 | |
| parameters. This is the smallest time unit representable in the | |
| stream, and in many cases represents the field rate of the stream | |
| (double the frame rate). | |
| .IP "\fBfixed_frame_rate_flag\fR" 4 | |
| .IX Item "fixed_frame_rate_flag" | |
| Set whether the stream has fixed framerate \- typically this indicates | |
| that the framerate is exactly half the tick rate, but the exact | |
| meaning is dependent on interlacing and the picture structure (see | |
| H.264 section E.2.1 and table E\-6). | |
| .IP "\fBzero_new_constraint_set_flags\fR" 4 | |
| .IX Item "zero_new_constraint_set_flags" | |
| Zero constraint_set4_flag and constraint_set5_flag in the \s-1SPS.\s0 These | |
| bits were reserved in a previous version of the H.264 spec, and thus | |
| some hardware decoders require these to be zero. The result of zeroing | |
| this is still a valid bitstream. | |
| .IP "\fBcrop_left\fR" 4 | |
| .IX Item "crop_left" | |
| .PD 0 | |
| .IP "\fBcrop_right\fR" 4 | |
| .IX Item "crop_right" | |
| .IP "\fBcrop_top\fR" 4 | |
| .IX Item "crop_top" | |
| .IP "\fBcrop_bottom\fR" 4 | |
| .IX Item "crop_bottom" | |
| .PD | |
| Set the frame cropping offsets in the \s-1SPS.\s0 These values will replace | |
| the current ones if the stream is already cropped. | |
| .Sp | |
| These fields are set in pixels. Note that some sizes may not be | |
| representable if the chroma is subsampled or the stream is interlaced | |
| (see H.264 section 7.4.2.1.1). | |
| .IP "\fBsei_user_data\fR" 4 | |
| .IX Item "sei_user_data" | |
| Insert a string as \s-1SEI\s0 unregistered user data. The argument must | |
| be of the form \fIUUID+string\fR, where the \s-1UUID\s0 is as hex digits | |
| possibly separated by hyphens, and the string can be anything. | |
| .Sp | |
| For example, \fB086f3693\-b7b3\-4f2c\-9653\-21492feee5b8+hello\fR will | |
| insert the string ``hello'' associated with the given \s-1UUID.\s0 | |
| .IP "\fBdelete_filler\fR" 4 | |
| .IX Item "delete_filler" | |
| Deletes both filler \s-1NAL\s0 units and filler \s-1SEI\s0 messages. | |
| .IP "\fBdisplay_orientation\fR" 4 | |
| .IX Item "display_orientation" | |
| Insert, extract or remove Display orientation \s-1SEI\s0 messages. | |
| See H.264 section D.1.27 and D.2.27 for syntax and semantics. | |
| .RS 4 | |
| .IP "\fBpass\fR" 4 | |
| .IX Item "pass" | |
| .PD 0 | |
| .IP "\fBinsert\fR" 4 | |
| .IX Item "insert" | |
| .IP "\fBremove\fR" 4 | |
| .IX Item "remove" | |
| .IP "\fBextract\fR" 4 | |
| .IX Item "extract" | |
| .RE | |
| .RS 4 | |
| .PD | |
| .Sp | |
| Default is pass. | |
| .Sp | |
| Insert mode works in conjunction with \f(CW\*(C`rotate\*(C'\fR and \f(CW\*(C`flip\*(C'\fR options. | |
| Any pre-existing Display orientation messages will be removed in insert or remove mode. | |
| Extract mode attaches the display matrix to the packet as side data. | |
| .RE | |
| .IP "\fBrotate\fR" 4 | |
| .IX Item "rotate" | |
| Set rotation in display orientation \s-1SEI\s0 (anticlockwise angle in degrees). | |
| Range is \-360 to +360. Default is NaN. | |
| .IP "\fBflip\fR" 4 | |
| .IX Item "flip" | |
| Set flip in display orientation \s-1SEI.\s0 | |
| .RS 4 | |
| .IP "\fBhorizontal\fR" 4 | |
| .IX Item "horizontal" | |
| .PD 0 | |
| .IP "\fBvertical\fR" 4 | |
| .IX Item "vertical" | |
| .RE | |
| .RS 4 | |
| .PD | |
| .Sp | |
| Default is unset. | |
| .RE | |
| .IP "\fBlevel\fR" 4 | |
| .IX Item "level" | |
| Set the level in the \s-1SPS.\s0 Refer to H.264 section A.3 and tables A\-1 | |
| to A\-5. | |
| .Sp | |
| The argument must be the name of a level (for example, \fB4.2\fR), a | |
| level_idc value (for example, \fB42\fR), or the special name \fBauto\fR | |
| indicating that the filter should attempt to guess the level from the | |
| input stream properties. | |
| .SS "h264_mp4toannexb" | |
| .IX Subsection "h264_mp4toannexb" | |
| Convert an H.264 bitstream from length prefixed mode to start code | |
| prefixed mode (as defined in the Annex B of the ITU-T H.264 | |
| specification). | |
| .PP | |
| This is required by some streaming formats, typically the \s-1MPEG\-2\s0 | |
| transport stream format (muxer \f(CW\*(C`mpegts\*(C'\fR). | |
| .PP | |
| For example to remux an \s-1MP4\s0 file containing an H.264 stream to mpegts | |
| format with \fBffmpeg\fR, you can use the command: | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT.mp4 \-codec copy \-bsf:v h264_mp4toannexb OUTPUT.ts | |
| .Ve | |
| .PP | |
| Please note that this filter is auto-inserted for MPEG-TS (muxer | |
| \&\f(CW\*(C`mpegts\*(C'\fR) and raw H.264 (muxer \f(CW\*(C`h264\*(C'\fR) output formats. | |
| .SS "h264_redundant_pps" | |
| .IX Subsection "h264_redundant_pps" | |
| This applies a specific fixup to some Blu-ray streams which contain | |
| redundant PPSs modifying irrelevant parameters of the stream which | |
| confuse other transformations which require correct extradata. | |
| .SS "hevc_metadata" | |
| .IX Subsection "hevc_metadata" | |
| Modify metadata embedded in an \s-1HEVC\s0 stream. | |
| .IP "\fBaud\fR" 4 | |
| .IX Item "aud" | |
| Insert or remove \s-1AUD NAL\s0 units in all access units of the stream. | |
| .RS 4 | |
| .IP "\fBinsert\fR" 4 | |
| .IX Item "insert" | |
| .PD 0 | |
| .IP "\fBremove\fR" 4 | |
| .IX Item "remove" | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBsample_aspect_ratio\fR" 4 | |
| .IX Item "sample_aspect_ratio" | |
| .PD | |
| Set the sample aspect ratio in the stream in the \s-1VUI\s0 parameters. | |
| .IP "\fBvideo_format\fR" 4 | |
| .IX Item "video_format" | |
| .PD 0 | |
| .IP "\fBvideo_full_range_flag\fR" 4 | |
| .IX Item "video_full_range_flag" | |
| .PD | |
| Set the video format in the stream (see H.265 section E.3.1 and | |
| table E.2). | |
| .IP "\fBcolour_primaries\fR" 4 | |
| .IX Item "colour_primaries" | |
| .PD 0 | |
| .IP "\fBtransfer_characteristics\fR" 4 | |
| .IX Item "transfer_characteristics" | |
| .IP "\fBmatrix_coefficients\fR" 4 | |
| .IX Item "matrix_coefficients" | |
| .PD | |
| Set the colour description in the stream (see H.265 section E.3.1 | |
| and tables E.3, E.4 and E.5). | |
| .IP "\fBchroma_sample_loc_type\fR" 4 | |
| .IX Item "chroma_sample_loc_type" | |
| Set the chroma sample location in the stream (see H.265 section | |
| E.3.1 and figure E.1). | |
| .IP "\fBtick_rate\fR" 4 | |
| .IX Item "tick_rate" | |
| Set the tick rate in the \s-1VPS\s0 and \s-1VUI\s0 parameters (time_scale / | |
| num_units_in_tick). Combined with \fBnum_ticks_poc_diff_one\fR, this can | |
| set a constant framerate in the stream. Note that it is likely to be | |
| overridden by container parameters when the stream is in a container. | |
| .IP "\fBnum_ticks_poc_diff_one\fR" 4 | |
| .IX Item "num_ticks_poc_diff_one" | |
| Set poc_proportional_to_timing_flag in \s-1VPS\s0 and \s-1VUI\s0 and use this value | |
| to set num_ticks_poc_diff_one_minus1 (see H.265 sections 7.4.3.1 and | |
| E.3.1). Ignored if \fBtick_rate\fR is not also set. | |
| .IP "\fBcrop_left\fR" 4 | |
| .IX Item "crop_left" | |
| .PD 0 | |
| .IP "\fBcrop_right\fR" 4 | |
| .IX Item "crop_right" | |
| .IP "\fBcrop_top\fR" 4 | |
| .IX Item "crop_top" | |
| .IP "\fBcrop_bottom\fR" 4 | |
| .IX Item "crop_bottom" | |
| .PD | |
| Set the conformance window cropping offsets in the \s-1SPS.\s0 These values | |
| will replace the current ones if the stream is already cropped. | |
| .Sp | |
| These fields are set in pixels. Note that some sizes may not be | |
| representable if the chroma is subsampled (H.265 section 7.4.3.2.1). | |
| .IP "\fBlevel\fR" 4 | |
| .IX Item "level" | |
| Set the level in the \s-1VPS\s0 and \s-1SPS.\s0 See H.265 section A.4 and tables | |
| A.6 and A.7. | |
| .Sp | |
| The argument must be the name of a level (for example, \fB5.1\fR), a | |
| \&\fIgeneral_level_idc\fR value (for example, \fB153\fR for level 5.1), | |
| or the special name \fBauto\fR indicating that the filter should | |
| attempt to guess the level from the input stream properties. | |
| .SS "hevc_mp4toannexb" | |
| .IX Subsection "hevc_mp4toannexb" | |
| Convert an \s-1HEVC/H.265\s0 bitstream from length prefixed mode to start code | |
| prefixed mode (as defined in the Annex B of the ITU-T H.265 | |
| specification). | |
| .PP | |
| This is required by some streaming formats, typically the \s-1MPEG\-2\s0 | |
| transport stream format (muxer \f(CW\*(C`mpegts\*(C'\fR). | |
| .PP | |
| For example to remux an \s-1MP4\s0 file containing an \s-1HEVC\s0 stream to mpegts | |
| format with \fBffmpeg\fR, you can use the command: | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT.mp4 \-codec copy \-bsf:v hevc_mp4toannexb OUTPUT.ts | |
| .Ve | |
| .PP | |
| Please note that this filter is auto-inserted for MPEG-TS (muxer | |
| \&\f(CW\*(C`mpegts\*(C'\fR) and raw \s-1HEVC/H.265\s0 (muxer \f(CW\*(C`h265\*(C'\fR or | |
| \&\f(CW\*(C`hevc\*(C'\fR) output formats. | |
| .SS "imxdump" | |
| .IX Subsection "imxdump" | |
| Modifies the bitstream to fit in \s-1MOV\s0 and to be usable by the Final Cut | |
| Pro decoder. This filter only applies to the mpeg2video codec, and is | |
| likely not needed for Final Cut Pro 7 and newer with the appropriate | |
| \&\fB\-tag:v\fR. | |
| .PP | |
| For example, to remux 30 MB/sec \s-1NTSC IMX\s0 to \s-1MOV:\s0 | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i input.mxf \-c copy \-bsf:v imxdump \-tag:v mx3n output.mov | |
| .Ve | |
| .SS "mjpeg2jpeg" | |
| .IX Subsection "mjpeg2jpeg" | |
| Convert \s-1MJPEG/AVI1\s0 packets to full \s-1JPEG/JFIF\s0 packets. | |
| .PP | |
| \&\s-1MJPEG\s0 is a video codec wherein each video frame is essentially a | |
| \&\s-1JPEG\s0 image. The individual frames can be extracted without loss, | |
| e.g. by | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i ../some_mjpeg.avi \-c:v copy frames_%d.jpg | |
| .Ve | |
| .PP | |
| Unfortunately, these chunks are incomplete \s-1JPEG\s0 images, because | |
| they lack the \s-1DHT\s0 segment required for decoding. Quoting from | |
| <\fBhttp://www.digitalpreservation.gov/formats/fdd/fdd000063.shtml\fR>: | |
| .PP | |
| Avery Lee, writing in the rec.video.desktop newsgroup in 2001, | |
| commented that \*(L"\s-1MJPEG,\s0 or at least the \s-1MJPEG\s0 in AVIs having the | |
| \&\s-1MJPG\s0 fourcc, is restricted \s-1JPEG\s0 with a fixed \*(-- and *omitted* \*(-- | |
| Huffman table. The \s-1JPEG\s0 must be YCbCr colorspace, it must be 4:2:2, | |
| and it must use basic Huffman encoding, not arithmetic or | |
| progressive. . . . You can indeed extract the \s-1MJPEG\s0 frames and | |
| decode them with a regular \s-1JPEG\s0 decoder, but you have to prepend | |
| the \s-1DHT\s0 segment to them, or else the decoder won't have any idea | |
| how to decompress the data. The exact table necessary is given in | |
| the OpenDML spec.\*(R" | |
| .PP | |
| This bitstream filter patches the header of frames extracted from an \s-1MJPEG\s0 | |
| stream (carrying the \s-1AVI1\s0 header \s-1ID\s0 and lacking a \s-1DHT\s0 segment) to | |
| produce fully qualified \s-1JPEG\s0 images. | |
| .PP | |
| .Vb 3 | |
| \& ffmpeg \-i mjpeg\-movie.avi \-c:v copy \-bsf:v mjpeg2jpeg frame_%d.jpg | |
| \& exiftran \-i \-9 frame*.jpg | |
| \& ffmpeg \-i frame_%d.jpg \-c:v copy rotated.avi | |
| .Ve | |
| .SS "mjpegadump" | |
| .IX Subsection "mjpegadump" | |
| Add an \s-1MJPEG A\s0 header to the bitstream, to enable decoding by | |
| Quicktime. | |
| .SS "mov2textsub" | |
| .IX Subsection "mov2textsub" | |
| Extract a representable text file from \s-1MOV\s0 subtitles, stripping the | |
| metadata header from each subtitle packet. | |
| .PP | |
| See also the \fBtext2movsub\fR filter. | |
| .SS "mp3decomp" | |
| .IX Subsection "mp3decomp" | |
| Decompress non-standard compressed \s-1MP3\s0 audio headers. | |
| .SS "mpeg2_metadata" | |
| .IX Subsection "mpeg2_metadata" | |
| Modify metadata embedded in an \s-1MPEG\-2\s0 stream. | |
| .IP "\fBdisplay_aspect_ratio\fR" 4 | |
| .IX Item "display_aspect_ratio" | |
| Set the display aspect ratio in the stream. | |
| .Sp | |
| The following fixed values are supported: | |
| .RS 4 | |
| .IP "\fB4/3\fR" 4 | |
| .IX Item "4/3" | |
| .PD 0 | |
| .IP "\fB16/9\fR" 4 | |
| .IX Item "16/9" | |
| .IP "\fB221/100\fR" 4 | |
| .IX Item "221/100" | |
| .RE | |
| .RS 4 | |
| .PD | |
| .Sp | |
| Any other value will result in square pixels being signalled instead | |
| (see H.262 section 6.3.3 and table 6\-3). | |
| .RE | |
| .IP "\fBframe_rate\fR" 4 | |
| .IX Item "frame_rate" | |
| Set the frame rate in the stream. This is constructed from a table | |
| of known values combined with a small multiplier and divisor \- if | |
| the supplied value is not exactly representable, the nearest | |
| representable value will be used instead (see H.262 section 6.3.3 | |
| and table 6\-4). | |
| .IP "\fBvideo_format\fR" 4 | |
| .IX Item "video_format" | |
| Set the video format in the stream (see H.262 section 6.3.6 and | |
| table 6\-6). | |
| .IP "\fBcolour_primaries\fR" 4 | |
| .IX Item "colour_primaries" | |
| .PD 0 | |
| .IP "\fBtransfer_characteristics\fR" 4 | |
| .IX Item "transfer_characteristics" | |
| .IP "\fBmatrix_coefficients\fR" 4 | |
| .IX Item "matrix_coefficients" | |
| .PD | |
| Set the colour description in the stream (see H.262 section 6.3.6 | |
| and tables 6\-7, 6\-8 and 6\-9). | |
| .SS "mpeg4_unpack_bframes" | |
| .IX Subsection "mpeg4_unpack_bframes" | |
| Unpack DivX-style packed B\-frames. | |
| .PP | |
| DivX-style packed B\-frames are not valid \s-1MPEG\-4\s0 and were only a | |
| workaround for the broken Video for Windows subsystem. | |
| They use more space, can cause minor \s-1AV\s0 sync issues, require more | |
| \&\s-1CPU\s0 power to decode (unless the player has some decoded picture queue | |
| to compensate the 2,0,2,0 frame per packet style) and cause | |
| trouble if copied into a standard container like mp4 or mpeg\-ps/ts, | |
| because \s-1MPEG\-4\s0 decoders may not be able to decode them, since they are | |
| not valid \s-1MPEG\-4.\s0 | |
| .PP | |
| For example to fix an \s-1AVI\s0 file containing an \s-1MPEG\-4\s0 stream with | |
| DivX-style packed B\-frames using \fBffmpeg\fR, you can use the command: | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT.avi \-codec copy \-bsf:v mpeg4_unpack_bframes OUTPUT.avi | |
| .Ve | |
| .SS "noise" | |
| .IX Subsection "noise" | |
| Damages the contents of packets or simply drops them without damaging the | |
| container. Can be used for fuzzing or testing error resilience/concealment. | |
| .PP | |
| Parameters: | |
| .IP "\fBamount\fR" 4 | |
| .IX Item "amount" | |
| Accepts an expression whose evaluation per-packet determines how often bytes in that | |
| packet will be modified. A value below 0 will result in a variable frequency. | |
| Default is 0 which results in no modification. However, if neither amount nor drop is specified, | |
| amount will be set to \fI\-1\fR. See below for accepted variables. | |
| .IP "\fBdrop\fR" 4 | |
| .IX Item "drop" | |
| Accepts an expression evaluated per-packet whose value determines whether that packet is dropped. | |
| Evaluation to a positive value results in the packet being dropped. Evaluation to a negative | |
| value results in a variable chance of it being dropped, roughly inverse in proportion to the magnitude | |
| of the value. Default is 0 which results in no drops. See below for accepted variables. | |
| .IP "\fBdropamount\fR" 4 | |
| .IX Item "dropamount" | |
| Accepts a non-negative integer, which assigns a variable chance of it being dropped, roughly inverse | |
| in proportion to the value. Default is 0 which results in no drops. This option is kept for backwards | |
| compatibility and is equivalent to setting drop to a negative value with the same magnitude | |
| i.e. \f(CW\*(C`dropamount=4\*(C'\fR is the same as \f(CW\*(C`drop=\-4\*(C'\fR. Ignored if drop is also specified. | |
| .PP | |
| Both \f(CW\*(C`amount\*(C'\fR and \f(CW\*(C`drop\*(C'\fR accept expressions containing the following variables: | |
| .IP "\fBn\fR" 4 | |
| .IX Item "n" | |
| The index of the packet, starting from zero. | |
| .IP "\fBtb\fR" 4 | |
| .IX Item "tb" | |
| The timebase for packet timestamps. | |
| .IP "\fBpts\fR" 4 | |
| .IX Item "pts" | |
| Packet presentation timestamp. | |
| .IP "\fBdts\fR" 4 | |
| .IX Item "dts" | |
| Packet decoding timestamp. | |
| .IP "\fBnopts\fR" 4 | |
| .IX Item "nopts" | |
| Constant representing \s-1AV_NOPTS_VALUE.\s0 | |
| .IP "\fBstartpts\fR" 4 | |
| .IX Item "startpts" | |
| First non\-AV_NOPTS_VALUE \s-1PTS\s0 seen in the stream. | |
| .IP "\fBstartdts\fR" 4 | |
| .IX Item "startdts" | |
| First non\-AV_NOPTS_VALUE \s-1DTS\s0 seen in the stream. | |
| .IP "\fBduration\fR" 4 | |
| .IX Item "duration" | |
| .PD 0 | |
| .IP "\fBd\fR" 4 | |
| .IX Item "d" | |
| .PD | |
| Packet duration, in timebase units. | |
| .IP "\fBpos\fR" 4 | |
| .IX Item "pos" | |
| Packet position in input; may be \-1 when unknown or not set. | |
| .IP "\fBsize\fR" 4 | |
| .IX Item "size" | |
| Packet size, in bytes. | |
| .IP "\fBkey\fR" 4 | |
| .IX Item "key" | |
| Whether packet is marked as a keyframe. | |
| .IP "\fBstate\fR" 4 | |
| .IX Item "state" | |
| A pseudo random integer, primarily derived from the content of packet payload. | |
| .PP | |
| \fIExamples\fR | |
| .IX Subsection "Examples" | |
| .PP | |
| Apply modification to every byte but don't drop any packets. | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c copy \-bsf noise=1 output.mkv | |
| .Ve | |
| .PP | |
| Drop every video packet not marked as a keyframe after timestamp 30s but do not | |
| modify any of the remaining packets. | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c copy \-bsf:v noise=drop=\*(Aqgt(t\e,30)*not(key)\*(Aq output.mkv | |
| .Ve | |
| .PP | |
| Drop one second of audio every 10 seconds and add some random noise to the rest. | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c copy \-bsf:a noise=amount=\-1:drop=\*(Aqbetween(mod(t\e,10)\e,9\e,10)\*(Aq output.mkv | |
| .Ve | |
| .SS "null" | |
| .IX Subsection "null" | |
| This bitstream filter passes the packets through unchanged. | |
| .SS "pcm_rechunk" | |
| .IX Subsection "pcm_rechunk" | |
| Repacketize \s-1PCM\s0 audio to a fixed number of samples per packet or a fixed packet | |
| rate per second. This is similar to the \fBasetnsamples audio | |
| filter\fR but works on audio packets instead of audio frames. | |
| .IP "\fBnb_out_samples, n\fR" 4 | |
| .IX Item "nb_out_samples, n" | |
| Set the number of samples per each output audio packet. The number is intended | |
| as the number of samples \fIper each channel\fR. Default value is 1024. | |
| .IP "\fBpad, p\fR" 4 | |
| .IX Item "pad, p" | |
| If set to 1, the filter will pad the last audio packet with silence, so that it | |
| will contain the same number of samples (or roughly the same number of samples, | |
| see \fBframe_rate\fR) as the previous ones. Default value is 1. | |
| .IP "\fBframe_rate, r\fR" 4 | |
| .IX Item "frame_rate, r" | |
| This option makes the filter output a fixed number of packets per second instead | |
| of a fixed number of samples per packet. If the audio sample rate is not | |
| divisible by the frame rate then the number of samples will not be constant but | |
| will vary slightly so that each packet will start as close to the frame | |
| boundary as possible. Using this option has precedence over \fBnb_out_samples\fR. | |
| .PP | |
| You can generate the well known 1602\-1601\-1602\-1601\-1602 pattern of 48kHz audio | |
| for \s-1NTSC\s0 frame rate using the \fBframe_rate\fR option. | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-f lavfi \-i sine=r=48000:d=1 \-c pcm_s16le \-bsf pcm_rechunk=r=30000/1001 \-f framecrc \- | |
| .Ve | |
| .SS "pgs_frame_merge" | |
| .IX Subsection "pgs_frame_merge" | |
| Merge a sequence of \s-1PGS\s0 Subtitle segments ending with an \*(L"end of display set\*(R" | |
| segment into a single packet. | |
| .PP | |
| This is required by some containers that support \s-1PGS\s0 subtitles | |
| (muxer \f(CW\*(C`matroska\*(C'\fR). | |
| .SS "prores_metadata" | |
| .IX Subsection "prores_metadata" | |
| Modify color property metadata embedded in prores stream. | |
| .IP "\fBcolor_primaries\fR" 4 | |
| .IX Item "color_primaries" | |
| Set the color primaries. | |
| Available values are: | |
| .RS 4 | |
| .IP "\fBauto\fR" 4 | |
| .IX Item "auto" | |
| Keep the same color primaries property (default). | |
| .IP "\fBunknown\fR" 4 | |
| .IX Item "unknown" | |
| .PD 0 | |
| .IP "\fBbt709\fR" 4 | |
| .IX Item "bt709" | |
| .IP "\fBbt470bg\fR" 4 | |
| .IX Item "bt470bg" | |
| .PD | |
| \&\s-1BT601 625\s0 | |
| .IP "\fBsmpte170m\fR" 4 | |
| .IX Item "smpte170m" | |
| \&\s-1BT601 525\s0 | |
| .IP "\fBbt2020\fR" 4 | |
| .IX Item "bt2020" | |
| .PD 0 | |
| .IP "\fBsmpte431\fR" 4 | |
| .IX Item "smpte431" | |
| .PD | |
| \&\s-1DCI P3\s0 | |
| .IP "\fBsmpte432\fR" 4 | |
| .IX Item "smpte432" | |
| P3 D65 | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBtransfer_characteristics\fR" 4 | |
| .IX Item "transfer_characteristics" | |
| Set the color transfer. | |
| Available values are: | |
| .RS 4 | |
| .IP "\fBauto\fR" 4 | |
| .IX Item "auto" | |
| Keep the same transfer characteristics property (default). | |
| .IP "\fBunknown\fR" 4 | |
| .IX Item "unknown" | |
| .PD 0 | |
| .IP "\fBbt709\fR" 4 | |
| .IX Item "bt709" | |
| .PD | |
| \&\s-1BT 601, BT 709, BT 2020\s0 | |
| .IP "\fBsmpte2084\fR" 4 | |
| .IX Item "smpte2084" | |
| \&\s-1SMPTE ST 2084\s0 | |
| .IP "\fBarib\-std\-b67\fR" 4 | |
| .IX Item "arib-std-b67" | |
| \&\s-1ARIB STD\-B67\s0 | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBmatrix_coefficients\fR" 4 | |
| .IX Item "matrix_coefficients" | |
| Set the matrix coefficient. | |
| Available values are: | |
| .RS 4 | |
| .IP "\fBauto\fR" 4 | |
| .IX Item "auto" | |
| Keep the same colorspace property (default). | |
| .IP "\fBunknown\fR" 4 | |
| .IX Item "unknown" | |
| .PD 0 | |
| .IP "\fBbt709\fR" 4 | |
| .IX Item "bt709" | |
| .IP "\fBsmpte170m\fR" 4 | |
| .IX Item "smpte170m" | |
| .PD | |
| \&\s-1BT 601\s0 | |
| .IP "\fBbt2020nc\fR" 4 | |
| .IX Item "bt2020nc" | |
| .RE | |
| .RS 4 | |
| .RE | |
| .PP | |
| Set Rec709 colorspace for each frame of the file | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c copy \-bsf:v prores_metadata=color_primaries=bt709:color_trc=bt709:colorspace=bt709 output.mov | |
| .Ve | |
| .PP | |
| Set Hybrid Log-Gamma parameters for each frame of the file | |
| .PP | |
| .Vb 1 | |
| \& ffmpeg \-i INPUT \-c copy \-bsf:v prores_metadata=color_primaries=bt2020:color_trc=arib\-std\-b67:colorspace=bt2020nc output.mov | |
| .Ve | |
| .SS "remove_extra" | |
| .IX Subsection "remove_extra" | |
| Remove extradata from packets. | |
| .PP | |
| It accepts the following parameter: | |
| .IP "\fBfreq\fR" 4 | |
| .IX Item "freq" | |
| Set which frame types to remove extradata from. | |
| .RS 4 | |
| .IP "\fBk\fR" 4 | |
| .IX Item "k" | |
| Remove extradata from non-keyframes only. | |
| .IP "\fBkeyframe\fR" 4 | |
| .IX Item "keyframe" | |
| Remove extradata from keyframes only. | |
| .IP "\fBe, all\fR" 4 | |
| .IX Item "e, all" | |
| Remove extradata from all frames. | |
| .RE | |
| .RS 4 | |
| .RE | |
| .SS "setts" | |
| .IX Subsection "setts" | |
| Set \s-1PTS\s0 and \s-1DTS\s0 in packets. | |
| .PP | |
| It accepts the following parameters: | |
| .IP "\fBts\fR" 4 | |
| .IX Item "ts" | |
| .PD 0 | |
| .IP "\fBpts\fR" 4 | |
| .IX Item "pts" | |
| .IP "\fBdts\fR" 4 | |
| .IX Item "dts" | |
| .PD | |
| Set expressions for \s-1PTS, DTS\s0 or both. | |
| .IP "\fBduration\fR" 4 | |
| .IX Item "duration" | |
| Set expression for duration. | |
| .IP "\fBtime_base\fR" 4 | |
| .IX Item "time_base" | |
| Set output time base. | |
| .PP | |
| The expressions are evaluated through the eval \s-1API\s0 and can contain the following | |
| constants: | |
| .IP "\fBN\fR" 4 | |
| .IX Item "N" | |
| The count of the input packet. Starting from 0. | |
| .IP "\fB\s-1TS\s0\fR" 4 | |
| .IX Item "TS" | |
| The demux timestamp in input in case of \f(CW\*(C`ts\*(C'\fR or \f(CW\*(C`dts\*(C'\fR option or presentation | |
| timestamp in case of \f(CW\*(C`pts\*(C'\fR option. | |
| .IP "\fB\s-1POS\s0\fR" 4 | |
| .IX Item "POS" | |
| The original position in the file of the packet, or undefined if undefined | |
| for the current packet | |
| .IP "\fB\s-1DTS\s0\fR" 4 | |
| .IX Item "DTS" | |
| The demux timestamp in input. | |
| .IP "\fB\s-1PTS\s0\fR" 4 | |
| .IX Item "PTS" | |
| The presentation timestamp in input. | |
| .IP "\fB\s-1DURATION\s0\fR" 4 | |
| .IX Item "DURATION" | |
| The duration in input. | |
| .IP "\fB\s-1STARTDTS\s0\fR" 4 | |
| .IX Item "STARTDTS" | |
| The \s-1DTS\s0 of the first packet. | |
| .IP "\fB\s-1STARTPTS\s0\fR" 4 | |
| .IX Item "STARTPTS" | |
| The \s-1PTS\s0 of the first packet. | |
| .IP "\fB\s-1PREV_INDTS\s0\fR" 4 | |
| .IX Item "PREV_INDTS" | |
| The previous input \s-1DTS.\s0 | |
| .IP "\fB\s-1PREV_INPTS\s0\fR" 4 | |
| .IX Item "PREV_INPTS" | |
| The previous input \s-1PTS.\s0 | |
| .IP "\fB\s-1PREV_INDURATION\s0\fR" 4 | |
| .IX Item "PREV_INDURATION" | |
| The previous input duration. | |
| .IP "\fB\s-1PREV_OUTDTS\s0\fR" 4 | |
| .IX Item "PREV_OUTDTS" | |
| The previous output \s-1DTS.\s0 | |
| .IP "\fB\s-1PREV_OUTPTS\s0\fR" 4 | |
| .IX Item "PREV_OUTPTS" | |
| The previous output \s-1PTS.\s0 | |
| .IP "\fB\s-1PREV_OUTDURATION\s0\fR" 4 | |
| .IX Item "PREV_OUTDURATION" | |
| The previous output duration. | |
| .IP "\fB\s-1NEXT_DTS\s0\fR" 4 | |
| .IX Item "NEXT_DTS" | |
| The next input \s-1DTS.\s0 | |
| .IP "\fB\s-1NEXT_PTS\s0\fR" 4 | |
| .IX Item "NEXT_PTS" | |
| The next input \s-1PTS.\s0 | |
| .IP "\fB\s-1NEXT_DURATION\s0\fR" 4 | |
| .IX Item "NEXT_DURATION" | |
| The next input duration. | |
| .IP "\fB\s-1TB\s0\fR" 4 | |
| .IX Item "TB" | |
| The timebase of stream packet belongs. | |
| .IP "\fB\s-1TB_OUT\s0\fR" 4 | |
| .IX Item "TB_OUT" | |
| The output timebase. | |
| .IP "\fB\s-1SR\s0\fR" 4 | |
| .IX Item "SR" | |
| The sample rate of stream packet belongs. | |
| .IP "\fB\s-1NOPTS\s0\fR" 4 | |
| .IX Item "NOPTS" | |
| The \s-1AV_NOPTS_VALUE\s0 constant. | |
| .SS "text2movsub" | |
| .IX Subsection "text2movsub" | |
| Convert text subtitles to \s-1MOV\s0 subtitles (as used by the \f(CW\*(C`mov_text\*(C'\fR | |
| codec) with metadata headers. | |
| .PP | |
| See also the \fBmov2textsub\fR filter. | |
| .SS "trace_headers" | |
| .IX Subsection "trace_headers" | |
| Log trace output containing all syntax elements in the coded stream | |
| headers (everything above the level of individual coded blocks). | |
| This can be useful for debugging low-level stream issues. | |
| .PP | |
| Supports \s-1AV1, H.264, H.265,\s0 (M)JPEG, \s-1MPEG\-2\s0 and \s-1VP9,\s0 but depending | |
| on the build only a subset of these may be available. | |
| .SS "truehd_core" | |
| .IX Subsection "truehd_core" | |
| Extract the core from a TrueHD stream, dropping \s-1ATMOS\s0 data. | |
| .SS "vp9_metadata" | |
| .IX Subsection "vp9_metadata" | |
| Modify metadata embedded in a \s-1VP9\s0 stream. | |
| .IP "\fBcolor_space\fR" 4 | |
| .IX Item "color_space" | |
| Set the color space value in the frame header. Note that any frame | |
| set to \s-1RGB\s0 will be implicitly set to \s-1PC\s0 range and that \s-1RGB\s0 is | |
| incompatible with profiles 0 and 2. | |
| .RS 4 | |
| .IP "\fBunknown\fR" 4 | |
| .IX Item "unknown" | |
| .PD 0 | |
| .IP "\fBbt601\fR" 4 | |
| .IX Item "bt601" | |
| .IP "\fBbt709\fR" 4 | |
| .IX Item "bt709" | |
| .IP "\fBsmpte170\fR" 4 | |
| .IX Item "smpte170" | |
| .IP "\fBsmpte240\fR" 4 | |
| .IX Item "smpte240" | |
| .IP "\fBbt2020\fR" 4 | |
| .IX Item "bt2020" | |
| .IP "\fBrgb\fR" 4 | |
| .IX Item "rgb" | |
| .RE | |
| .RS 4 | |
| .RE | |
| .IP "\fBcolor_range\fR" 4 | |
| .IX Item "color_range" | |
| .PD | |
| Set the color range value in the frame header. Note that any value | |
| imposed by the color space will take precedence over this value. | |
| .RS 4 | |
| .IP "\fBtv\fR" 4 | |
| .IX Item "tv" | |
| .PD 0 | |
| .IP "\fBpc\fR" 4 | |
| .IX Item "pc" | |
| .RE | |
| .RS 4 | |
| .RE | |
| .PD | |
| .SS "vp9_superframe" | |
| .IX Subsection "vp9_superframe" | |
| Merge \s-1VP9\s0 invisible (alt-ref) frames back into \s-1VP9\s0 superframes. This | |
| fixes merging of split/segmented \s-1VP9\s0 streams where the alt-ref frame | |
| was split from its visible counterpart. | |
| .SS "vp9_superframe_split" | |
| .IX Subsection "vp9_superframe_split" | |
| Split \s-1VP9\s0 superframes into single frames. | |
| .SS "vp9_raw_reorder" | |
| .IX Subsection "vp9_raw_reorder" | |
| Given a \s-1VP9\s0 stream with correct timestamps but possibly out of order, | |
| insert additional show-existing-frame packets to correct the ordering. | |
| .SH "SEE ALSO" | |
| .IX Header "SEE ALSO" | |
| \&\fBffmpeg\fR\|(1), \fBffplay\fR\|(1), \fBffprobe\fR\|(1), \fBlibavcodec\fR\|(3) | |
| .SH "AUTHORS" | |
| .IX Header "AUTHORS" | |
| The FFmpeg developers. | |
| .PP | |
| For details about the authorship, see the Git history of the project | |
| (https://git.ffmpeg.org/ffmpeg), e.g. by typing the command | |
| \&\fBgit log\fR in the FFmpeg source directory, or browsing the | |
| online repository at <\fBhttps://git.ffmpeg.org/ffmpeg\fR>. | |
| .PP | |
| Maintainers for the specific components are listed in the file | |
| \&\fI\s-1MAINTAINERS\s0\fR in the source code tree. | |