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doc/bitstream_filters.texi: Document types used by filter_units 

Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Reviewed-by: Marth64 <marth64@proxyid.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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Andreas Rheinhardt 2024-03-10 16:33:23 +01:00
parent 2c82ec9b4a
commit cc95fd4531
1 changed files with 7 additions and 0 deletions
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doc/bitstream_filters.texi
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@ -199,6 +199,13 @@ Identical to @option{pass_types}, except the units in the given set
removed and all others passed through.
@end table
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.