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| author | Nicolas Gaullier <nicolas.gaullier@cji.paris> | 2024-03-29 10:26:19 +0100 |
|---|---|---|
| committer | Stefano Sabatini <stefasab@gmail.com> | 2024-04-02 19:53:40 +0200 |
| commit | ed9363052f4b8b89ed2f1415f392d39788dab0d3 (patch) | |
| tree | 710b11cf226965b1594f0ce92a00e45a62df794c /doc/APIchanges | |
| parent | 13cdef9d450e5a164740a57a92f723b1bd4b41c6 (diff) | |
| download | ffmpeg-ed9363052f4b8b89ed2f1415f392d39788dab0d3.tar.gz | |
avformat/demux: add duration_probesize AVOption
Yet another probesize used to get the durations when
estimate_timings_from_pts is required. It is aimed at users interested
in better durations probing for itself, or because using
avformat_find_stream_info indirectly and requiring exact values: for
concatdec for example, especially if streamcopying above it.
The current code is a performance trade-off that can fail to get video
stream durations in a scenario with high bitrates and buffering for
files ending cleanly (as opposed to live captures): the physical gap
between the last video packet and the last audio packet is very high in
such a case.
Default behaviour is unchanged: 250k up to 250k << 6 (step by step).
Setting this new option has two effects:
- override the maximum probesize (currently 250k << 6)
- reduce the number of steps to 1 instead of 6, this is to avoid
detecting the audio "too early" and failing to reach a video packet.
Even if a single audio stream duration is found but not the other
audio/video stream durations, there will be a retry, so at the end the
full user-overriden probesize will be used as expected by the user.
Signed-off-by: Nicolas Gaullier <nicolas.gaullier@cji.paris>
Diffstat (limited to 'doc/APIchanges')
| -rw-r--r-- | doc/APIchanges | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/APIchanges b/doc/APIchanges index aa102b4925..e7677658b1 100644 --- a/doc/APIchanges +++ b/doc/APIchanges @@ -2,6 +2,9 @@ The last version increases of all libraries were on 2024-03-07 API changes, most recent first: +2024-03-29 - xxxxxxxxxx - lavf 61.3.100 - avformat.h + Add AVFormatContext.duration_probesize. + 2024-03-27 - xxxxxxxxxx - lavu 59.10.100 - frame.h Add AVSideDataDescriptor, enum AVSideDataProps, and av_frame_side_data_desc(). |