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Diffstat (limited to 'doc/bitstream_filters.texi')
| -rw-r--r-- | doc/bitstream_filters.texi | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi index aac4705..982e3ed 100644 --- a/doc/bitstream_filters.texi +++ b/doc/bitstream_filters.texi @@ -93,6 +93,35 @@ When this option is enabled, the long-term headers are removed from the bitstream after extraction. @end table +@section filter_units + +Remove units with types in or not in a given set from the stream. + +@table @option +@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 '-'. + +@item remove_types +Identical to @option{pass_types}, except the units in the given set +removed and all others passed through. +@end table + +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: +@example +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=pass_types=1-5' OUTPUT +@end example + +To remove all AUDs, SEI and filler from an H.265 stream: +@example +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=35|38-40' OUTPUT +@end example + @section hapqa_extract Extract Rgb or Alpha part of an HAPQA file, without recompression, in order to create an HAPQ or an HAPAlphaOnly file. |
