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 --list-bsfs.

You can disable all the bitstream filters using the configure option --disable-bsfs, and selectively enable any bitstream filter using the option --enable-bsf=BSF, or you can disable a particular bitstream filter using the option --disable-bsf=BSF.

The option -bsfs of the ff* tools will display the list of all the supported bitstream filters included in your build.

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 '='.

     ffmpeg -i INPUT -c:v copy -bsf:v filter1[=opt1=str1:opt2=str2][,filter2] OUTPUT

Below is a description of the currently available bitstream filters, with their parameters, if any.

aac_adtstoasc
=============

Convert MPEG-2/4 AAC ADTS to an MPEG-4 Audio Specific Configuration bitstream.

This filter creates an MPEG-4 AudioSpecificConfig from an MPEG-2/4 ADTS header and removes the ADTS header.

This filter is required for example when copying an AAC stream from a raw ADTS AAC or an MPEG-TS container to MP4A-LATM, to an FLV file, or to MOV/MP4 files and related formats such as 3GP or M4A. Please note that it is auto-inserted for MP4A-LATM and MOV/MP4 and related formats.

av1_metadata
============

Modify metadata embedded in an AV1 stream.

td
     Insert or remove temporal delimiter OBUs in all temporal units of the stream.

     insert
          Insert a TD at the beginning of every TU which does not already have one.

     remove
          Remove the TD from the beginning of every TU which has one.

color_primaries

transfer_characteristics

matrix_coefficients
     Set the color description fields in the stream (see AV1 section 6.4.2).

color_range
     Set the color range in the stream (see AV1 section 6.4.2; note that this cannot be set for streams using BT.709 primaries, sRGB transfer characteristic and identity (RGB) matrix coefficients).

     tv
          Limited range.

     pc
          Full range.

chroma_sample_position
     Set the chroma sample location in the stream (see AV1 section 6.4.2). This can only be set for 4:2:0 streams.

     vertical
          Left position (matching the default in MPEG-2 and H.264).

     colocated
          Top-left position.

tick_rate
     Set the tick rate (time_scale / num_units_in_display_tick) in the timing info in the sequence header.

num_ticks_per_picture
     Set the number of ticks in each picture, to indicate that the stream has a fixed framerate.  Ignored if tick_rate is not also set.

delete_padding
     Deletes Padding OBUs.

chomp
=====

Remove zero padding at the end of a packet.

dca_core
========

Extract the core from a DCA/DTS stream, dropping extensions such as DTS-HD.

dovi_rpu
========

Manipulate Dolby Vision metadata in a HEVC/AV1 bitstream, optionally enabling metadata compression.

strip
     If enabled, strip all Dolby Vision metadata (configuration record + RPU data blocks) from the stream.

compression
     Which compression level to enable.

     none
          No metadata compression.

     limited
          Limited metadata compression scheme. Should be compatible with most devices. This is the default.

     extended
          Extended metadata compression. Devices are not required to support this. Note that this level currently behaves the same as limited in libavcodec.

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.

freq
     The additional argument specifies which packets should be filtered. It accepts the values:

     k

     keyframe
          add extradata to all key packets

     e

     all
          add extradata to all packets

If not specified it is assumed k.

For example the following ffmpeg command forces a global header (thus disabling individual packet headers) in the H.264 packets generated by the libx264 encoder, but corrects them by adding the header stored in extradata to the key packets:

     ffmpeg -i INPUT -map 0 -flags:v +global_header -c:v libx264 -bsf:v dump_extra out.ts

dv_error_marker
===============

Blocks in DV which are marked as damaged are replaced by blocks of the specified color.

color
     The color to replace damaged blocks by

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.

     ok
          No error, no concealment

     err
          Error, No concealment

     res
          Reserved

     notok
          Error or concealment

     notres
          Not reserved

     Aa, Ba, Ca, Ab, Bb, Cb, A, B, C, a, b, erri, erru
          The specific error status code

     see page 44-46 or section 5.5 of http://web.archive.org/web/20060927044735/http://www.smpte.org/smpte_store/standards/pdf/s314m.pdf

eac3_core
=========

Extract the core from a E-AC-3 stream, dropping extra channels.

eia608_to_smpte436m
===================

Convert from a EIA_608 stream to a SMPTE_436M_ANC data stream, wrapping the closed captions in CTA-708 CDP VANC packets.

line_number
     Choose which line number the generated VANC packets should go on. You generally want either line 9 (the default) or 11.

wrapping_type
     Choose the SMPTE 436M wrapping type, defaults to vanc_frame. It accepts the values:

     vanc_frame
          VANC frame (interlaced or segmented progressive frame)

     vanc_field_1

     vanc_field_2

     vanc_progressive_frame

sample_coding
     Choose the SMPTE 436M sample coding, defaults to 8bit_luma. It accepts the values:

     8bit_luma
          8-bit component luma samples

     8bit_color_diff
          8-bit component color difference samples

     8bit_luma_and_color_diff
          8-bit component luma and color difference samples

     10bit_luma
          10-bit component luma samples

     10bit_color_diff
          10-bit component color difference samples

     10bit_luma_and_color_diff
          10-bit component luma and color difference samples

     8bit_luma_parity_error
          8-bit component luma samples with parity error

     8bit_color_diff_parity_error
          8-bit component color difference samples with parity error

     8bit_luma_and_color_diff_parity_error
          8-bit component luma and color difference samples with parity error

initial_cdp_sequence_cntr
     The initial value of the CDP's 16-bit unsigned integer cdp_hdr_sequence_cntr and cdp_ftr_sequence_cntr fields. Defaults to 0.

cdp_frame_rate
     Set the CDP's cdp_frame_rate field. This doesn't actually change the timing of the data stream, it just changes the values inserted in that field in the generated CDP packets. Defaults to 30000/1001.

extract_extradata
=================

Extract the in-band extradata.

Certain codecs allow the long-term headers (e.g. MPEG-2 sequence headers, or H.264/HEVC (VPS/)SPS/PPS) to be transmitted either "in-band" (i.e. as a part of the bitstream containing the coded frames) or "out of band" (e.g. on the container level). This latter form is called "extradata" in FFmpeg terminology.

This bitstream filter detects the in-band headers and makes them available as extradata.

remove
     When this option is enabled, the long-term headers are removed from the bitstream after extraction.

filter_units
============

Remove units with types in or not in a given set from the stream.

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 '-'.

remove_types
     Identical to pass_types, except the units in the given set removed and all others passed through.

The types used by pass_types and remove_types correspond to NAL unit types (nal_unit_type) in H.264, HEVC and H.266 (see Table 7-1 in the H.264 and HEVC specifications or Table 5 in the H.266 specification), to marker values for JPEG (without 0xFF prefix) and to start codes without start code prefix (i.e. the byte following the 0x000001) for MPEG-2. For VP8 and VP9, every unit has type zero.

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.

For example, to remove all non-VCL NAL units from an H.264 stream:

     ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=pass_types=1-5' OUTPUT

To remove all AUDs, SEI and filler from an H.265 stream:

     ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=35|38-40' OUTPUT

To remove all user data from a MPEG-2 stream, including Closed Captions:

     ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=178' OUTPUT

To remove all SEI from a H264 stream, including Closed Captions:

     ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=6' OUTPUT

To remove all prefix and suffix SEI from a HEVC stream, including Closed Captions and dynamic HDR:

     ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=39|40' OUTPUT

hapqa_extract
=============

Extract Rgb or Alpha part of an HAPQA file, without recompression, in order to create an HAPQ or an HAPAlphaOnly file.

texture
     Specifies the texture to keep.

     color

     alpha

Convert HAPQA to HAPQ

     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

Convert HAPQA to HAPAlphaOnly

     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

h264_metadata
=============

Modify metadata embedded in an H.264 stream.

aud
     Insert or remove AUD NAL units in all access units of the stream.

     pass

     insert

     remove

     Default is pass.

sample_aspect_ratio
     Set the sample aspect ratio of the stream in the VUI parameters. See H.264 table E-1.

overscan_appropriate_flag
     Set whether the stream is suitable for display using overscan or not (see H.264 section E.2.1).

video_format

video_full_range_flag
     Set the video format in the stream (see H.264 section E.2.1 and table E-2).

colour_primaries

transfer_characteristics

matrix_coefficients
     Set the colour description in the stream (see H.264 section E.2.1 and tables E-3, E-4 and E-5).

chroma_sample_loc_type
     Set the chroma sample location in the stream (see H.264 section E.2.1 and figure E-1).

tick_rate
     Set the tick rate (time_scale / num_units_in_tick) in the VUI 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).

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).

zero_new_constraint_set_flags
     Zero constraint_set4_flag and constraint_set5_flag in the SPS. 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.

crop_left

crop_right

crop_top

crop_bottom
     Set the frame cropping offsets in the SPS.  These values will replace the current ones if the stream is already cropped.

     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).

sei_user_data
     Insert a string as SEI unregistered user data.  The argument must be of the form UUID+string, where the UUID is as hex digits possibly separated by hyphens, and the string can be anything.

     For example, 086f3693-b7b3-4f2c-9653-21492feee5b8+hello will insert the string ``hello'' associated with the given UUID.

delete_filler
     Deletes both filler NAL units and filler SEI messages.

display_orientation
     Insert, extract or remove Display orientation SEI messages. See H.264 section D.1.27 and D.2.27 for syntax and semantics.

     pass

     insert

     remove

     extract

     Default is pass.

     Insert mode works in conjunction with rotate and flip 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.

rotate
     Set rotation in display orientation SEI (anticlockwise angle in degrees). Range is -360 to +360. Default is NaN.

flip
     Set flip in display orientation SEI.

     horizontal

     vertical

     Default is unset.

level
     Set the level in the SPS.  Refer to H.264 section A.3 and tables A-1 to A-5.

     The argument must be the name of a level (for example, 4.2), a level_idc value (for example, 42), or the special name auto indicating that the filter should attempt to guess the level from the input stream properties.

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).

This is required by some streaming formats, typically the MPEG-2 transport stream format (muxer mpegts).

For example to remux an MP4 file containing an H.264 stream to mpegts format with ffmpeg, you can use the command:

     ffmpeg -i INPUT.mp4 -codec copy -bsf:v h264_mp4toannexb OUTPUT.ts

Please note that this filter is auto-inserted for MPEG-TS (muxer mpegts) and raw H.264 (muxer h264) output formats.

h264_redundant_pps
==================

This applies a specific fixup to some Blu-ray BDMV H264 streams which contain redundant PPSs. The PPSs modify irrelevant parameters of the stream, confusing other transformations which require the correct extradata.

The encoder used on these impacted streams adds extra PPSs throughout the stream, varying the initial QP and whether weighted prediction was enabled. This causes issues after copying the stream into a global header container, as the starting PPS is not suitable for the rest of the stream. One side effect, for example, is seeking will return garbled output until a new PPS appears.

This BSF removes the extra PPSs and rewrites the slice headers such that the stream uses a single leading PPS in the global header, which resolves the issue.

hevc_metadata
=============

Modify metadata embedded in an HEVC stream.

aud
     Insert or remove AUD NAL units in all access units of the stream.

     insert

     remove

sample_aspect_ratio
     Set the sample aspect ratio in the stream in the VUI parameters.

video_format

video_full_range_flag
     Set the video format in the stream (see H.265 section E.3.1 and table E.2).

colour_primaries

transfer_characteristics

matrix_coefficients
     Set the colour description in the stream (see H.265 section E.3.1 and tables E.3, E.4 and E.5).

chroma_sample_loc_type
     Set the chroma sample location in the stream (see H.265 section E.3.1 and figure E.1).

tick_rate
     Set the tick rate in the VPS and VUI parameters (time_scale / num_units_in_tick). Combined with num_ticks_poc_diff_one, 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.

num_ticks_poc_diff_one
     Set poc_proportional_to_timing_flag in VPS and VUI 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 tick_rate is not also set.

crop_left

crop_right

crop_top

crop_bottom
     Set the conformance window cropping offsets in the SPS.  These values will replace the current ones if the stream is already cropped.

     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).

width

height
     Set width and height after crop.

level
     Set the level in the VPS and SPS.  See H.265 section A.4 and tables A.6 and A.7.

     The argument must be the name of a level (for example, 5.1), a general_level_idc value (for example, 153 for level 5.1), or the special name auto indicating that the filter should attempt to guess the level from the input stream properties.

hevc_mp4toannexb
================

Convert an HEVC/H.265 bitstream from length prefixed mode to start code prefixed mode (as defined in the Annex B of the ITU-T H.265 specification).

This is required by some streaming formats, typically the MPEG-2 transport stream format (muxer mpegts).

For example to remux an MP4 file containing an HEVC stream to mpegts format with ffmpeg, you can use the command:

     ffmpeg -i INPUT.mp4 -codec copy -bsf:v hevc_mp4toannexb OUTPUT.ts

Please note that this filter is auto-inserted for MPEG-TS (muxer mpegts) and raw HEVC/H.265 (muxer h265 or hevc) output formats.

imxdump
=======

Modifies the bitstream to fit in MOV 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 -tag:v.

For example, to remux 30 MB/sec NTSC IMX to MOV:

     ffmpeg -i input.mxf -c copy -bsf:v imxdump -tag:v mx3n output.mov

mjpeg2jpeg
==========

Convert MJPEG/AVI1 packets to full JPEG/JFIF packets.

MJPEG is a video codec wherein each video frame is essentially a JPEG image. The individual frames can be extracted without loss, e.g. by

     ffmpeg -i ../some_mjpeg.avi -c:v copy frames_%d.jpg

Unfortunately, these chunks are incomplete JPEG images, because they lack the DHT segment required for decoding. Quoting from http://www.digitalpreservation.gov/formats/fdd/fdd000063.shtml:

Avery Lee, writing in the rec.video.desktop newsgroup in 2001, commented that "MJPEG, or at least the MJPEG in AVIs having the MJPG fourcc, is restricted JPEG with a fixed -- and *omitted* -- Huffman table. The JPEG 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 MJPEG frames and decode them with a regular JPEG decoder, but you have to prepend the DHT 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."

This bitstream filter patches the header of frames extracted from an MJPEG stream (carrying the AVI1 header ID and lacking a DHT segment) to produce fully qualified JPEG images.

     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

mjpegadump
==========

Add an MJPEG A header to the bitstream, to enable decoding by Quicktime.

mov2textsub
===========

Extract a representable text file from MOV subtitles, stripping the metadata header from each subtitle packet.

See also the text2movsub filter.

mpeg2_metadata
==============

Modify metadata embedded in an MPEG-2 stream.

display_aspect_ratio
     Set the display aspect ratio in the stream.

     The following fixed values are supported:

     4/3

     16/9

     221/100

     Any other value will result in square pixels being signalled instead (see H.262 section 6.3.3 and table 6-3).

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).

video_format
     Set the video format in the stream (see H.262 section 6.3.6 and table 6-6).

colour_primaries

transfer_characteristics

matrix_coefficients
     Set the colour description in the stream (see H.262 section 6.3.6 and tables 6-7, 6-8 and 6-9).

mpeg4_unpack_bframes
====================

Unpack DivX-style packed B-frames.

DivX-style packed B-frames are not valid MPEG-4 and were only a workaround for the broken Video for Windows subsystem. They use more space, can cause minor AV sync issues, require more CPU 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 MPEG-4 decoders may not be able to decode them, since they are not valid MPEG-4.

For example to fix an AVI file containing an MPEG-4 stream with DivX-style packed B-frames using ffmpeg, you can use the command:

     ffmpeg -i INPUT.avi -codec copy -bsf:v mpeg4_unpack_bframes OUTPUT.avi

noise
=====

Damages the contents of packets or simply drops them without damaging the container. Can be used for fuzzing or testing error resilience/concealment.

Parameters:

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 -1. See below for accepted variables.

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.

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. dropamount=4 is the same as drop=-4. Ignored if drop is also specified.

Both amount and drop accept expressions containing the following variables:

n
     The index of the packet, starting from zero.

tb
     The timebase for packet timestamps.

pts
     Packet presentation timestamp.

dts
     Packet decoding timestamp.

nopts
     Constant representing AV_NOPTS_VALUE.

startpts
     First non-AV_NOPTS_VALUE PTS seen in the stream.

startdts
     First non-AV_NOPTS_VALUE DTS seen in the stream.

duration
d
     Packet duration, in timebase units.

pos
     Packet position in input; may be -1 when unknown or not set.

size
     Packet size, in bytes.

key
     Whether packet is marked as a keyframe.

state
     A pseudo random integer, primarily derived from the content of packet payload.

Examples
--------

Apply modification to every byte but don't drop any packets.

     ffmpeg -i INPUT -c copy -bsf noise=1 output.mkv

Drop every video packet not marked as a keyframe after timestamp 30s but do not modify any of the remaining packets.

     ffmpeg -i INPUT -c copy -bsf:v noise=drop='gt(pts*tb\,30)*not(key)' output.mkv

Drop one second of audio every 10 seconds and add some random noise to the rest.

     ffmpeg -i INPUT -c copy -bsf:a noise=amount=-1:drop='between(mod(pts*tb\,10)\,9\,10)' output.mkv

null
====

This bitstream filter passes the packets through unchanged.

pcm_rechunk
===========

Repacketize PCM audio to a fixed number of samples per packet or a fixed packet rate per second. This is similar to the asetnsamples audio filter (ffmpeg-filters) but works on audio packets instead of audio frames.

nb_out_samples, n
     Set the number of samples per each output audio packet. The number is intended as the number of samples per each channel. Default value is 1024.

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 frame_rate) as the previous ones. Default value is 1.

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 nb_out_samples.

You can generate the well known 1602-1601-1602-1601-1602 pattern of 48kHz audio for NTSC frame rate using the frame_rate option.

     ffmpeg -f lavfi -i sine=r=48000:d=1 -c pcm_s16le -bsf pcm_rechunk=r=30000/1001 -f framecrc -

pgs_frame_merge
===============

Merge a sequence of PGS Subtitle segments ending with an "end of display set" segment into a single packet.

This is required by some containers that support PGS subtitles (muxer matroska).

prores_metadata
===============

Modify color property metadata embedded in prores stream.

color_primaries
     Set the color primaries. Available values are:

     auto
          Keep the same color primaries property (default).

     unknown

     bt709

     bt470bg
          BT601 625

     smpte170m
          BT601 525

     bt2020

     smpte431
          DCI P3

     smpte432
          P3 D65

transfer_characteristics
     Set the color transfer. Available values are:

     auto
          Keep the same transfer characteristics property (default).

     unknown

     bt709
          BT 601, BT 709, BT 2020

     smpte2084
          SMPTE ST 2084

     arib-std-b67
          ARIB STD-B67

matrix_coefficients
     Set the matrix coefficient. Available values are:

     auto
          Keep the same colorspace property (default).

     unknown

     bt709

     smpte170m
          BT 601

     bt2020nc

Set Rec709 colorspace for each frame of the file

     ffmpeg -i INPUT -c copy -bsf:v prores_metadata=color_primaries=bt709:color_trc=bt709:colorspace=bt709 output.mov

Set Hybrid Log-Gamma parameters for each frame of the file

     ffmpeg -i INPUT -c copy -bsf:v prores_metadata=color_primaries=bt2020:color_trc=arib-std-b67:colorspace=bt2020nc output.mov

remove_extra
============

Remove extradata from packets.

It accepts the following parameter:

freq
     Set which frame types to remove extradata from.

     k
          Remove extradata from non-keyframes only.

     keyframe
          Remove extradata from keyframes only.

     e, all
          Remove extradata from all frames.

setts
=====

Set PTS and DTS in packets.

It accepts the following parameters:

ts

pts

dts
     Set expressions for PTS, DTS or both.

duration
     Set expression for duration.

time_base
     Set output time base.

The expressions are evaluated through the eval API and can contain the following constants:

N
     The count of the input packet. Starting from 0.

TS
     The demux timestamp in input in case of ts or dts option or presentation timestamp in case of pts option.

POS
     The original position in the file of the packet, or undefined if undefined for the current packet

DTS
     The demux timestamp in input.

PTS
     The presentation timestamp in input.

DURATION
     The duration in input.

STARTDTS
     The DTS of the first packet.

STARTPTS
     The PTS of the first packet.

PREV_INDTS
     The previous input DTS.

PREV_INPTS
     The previous input PTS.

PREV_INDURATION
     The previous input duration.

PREV_OUTDTS
     The previous output DTS.

PREV_OUTPTS
     The previous output PTS.

PREV_OUTDURATION
     The previous output duration.

NEXT_DTS
     The next input DTS.

NEXT_PTS
     The next input PTS.

NEXT_DURATION
     The next input duration.

TB
     The timebase of stream packet belongs.

TB_OUT
     The output timebase.

SR
     The sample rate of stream packet belongs.

NOPTS
     The AV_NOPTS_VALUE constant.

For example, to set PTS equal to DTS (not recommended if B-frames are involved):

     ffmpeg -i INPUT -c:a copy -bsf:a setts=pts=DTS out.mkv

showinfo
========

Log basic packet information. Mainly useful for testing, debugging, and development.

smpte436m_to_eia608
===================

Convert from a SMPTE_436M_ANC data stream to a EIA_608 stream, extracting the closed captions from CTA-708 CDP VANC packets, and ignoring all other data.

text2movsub
===========

Convert text subtitles to MOV subtitles (as used by the mov_text codec) with metadata headers.

See also the mov2textsub filter.

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.

Supports AV1, H.264, H.265, (M)JPEG, MPEG-2 and VP9, but depending on the build only a subset of these may be available.

truehd_core
===========

Extract the core from a TrueHD stream, dropping ATMOS data.

vp9_metadata
============

Modify metadata embedded in a VP9 stream.

color_space
     Set the color space value in the frame header.  Note that any frame set to RGB will be implicitly set to PC range and that RGB is incompatible with profiles 0 and 2.

     unknown

     bt601

     bt709

     smpte170

     smpte240

     bt2020

     rgb

color_range
     Set the color range value in the frame header.  Note that any value imposed by the color space will take precedence over this value.

     tv

     pc

vp9_superframe
==============

Merge VP9 invisible (alt-ref) frames back into VP9 superframes. This fixes merging of split/segmented VP9 streams where the alt-ref frame was split from its visible counterpart.

vp9_superframe_split
====================

Split VP9 superframes into single frames.

vp9_raw_reorder
===============

Given a VP9 stream with correct timestamps but possibly out of order, insert additional show-existing-frame packets to correct the ordering.