RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-31 03:42:11 +00:00
Code Issues Projects Releases Wiki Activity

doc/bitstream_filters: elaborate on h264_redundant_pps

Browse Source 
Signed-off-by: Marth64 <marth64@proxyid.net>
This commit is contained in:
Marth64 2024-10-12 11:44:49 -05:00
parent 13129f1af4
commit 6d5a0998b6
1 changed files with 15 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
doc/bitstream_filters.texi
View File

@ -423,9 +423,21 @@ Please note that this filter is auto-inserted for MPEG-TS (muxer
@section 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.
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.
@section hevc_metadata