If the API user doesn't set avg_frame_rate, matroskaenc will write the
current timebase as "default duration" for the video track. This makes
no sense, because the "default duration" implies the framerate of the
video. Since the timebase is forced to 1/1000, this will make the
resulting file claim 1000fps.

Drop it and don't write the element. It's optional, so it's better not
to write it if the framerate is unknown.

Strangely does not require FATE changes.

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

We may check priv->sei_needed only when writing SEI messages.
Signed-off-by: NHaihao Xiang <haihao.xiang@intel.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

avcodec/mpeg4videodec: Move decode_studiovisualobject() parsing in the branch for visual object parsing

Fixes: runtime error: shift exponent -1 is negative
Fixes: 7510/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5024523356209152

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This one actually works with hd1080 y4m files when seeking backwards.
Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

They are yet to be supported,
Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Enables one to test possibly nonstandard formats such as Opus or
FLAC in ISOBMFF, among other things.

This becomes much more useful if output segment format becomes an
option, or if the WebM segment feature gets removed.

It has not ever been working and has not been validated,
Additionally, mention that the segment file names should be changed
to end with webm instead of m4s, which is utilized for ISOBMFF
fragments.

Fixes crash when muxing MKV-in-DASH

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Specifically for yuv444, yuv422, yuv420 format when main stream has no alpha, and alpha
is straight.
Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Fixes stream field order written by avformat_write_header when "top"
option is specified on the command-line.
Signed-off-by: NTobias Rapp <t.rapp@noa-archive.com>

Before this, a failed test would keep failing because the output file
is not cleaned up and subsequent runs would refuse to overwrite it.

Uses the same mechanism as other codecs - conformance test files are
passed through the metadata filter (which, with no options, reads the
input and writes it back) and the output verified to match the input.

Can adjust the colour information.

This makes the trace output for arrays significantly nicer.

Make this clear in the documentation and add some asserts to ensure
that it is always true.

Helps with multi-channels audio. Otherwise use threads=1.
Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>

Reviewed-by: NMark Thompson <sw@jkqxz.net>
Signed-off-by: NJames Almer <jamrial@gmail.com>

Reviewed-by: NMark Thompson <sw@jkqxz.net>
Signed-off-by: NJames Almer <jamrial@gmail.com>

Reviewed-by: NMichael Niedermayer <michael@niedermayer.cc>
Signed-off-by: NJames Almer <jamrial@gmail.com>

Signed-off-by: NMarton Balint <cus@passwd.hu>

Create a buffer from the data instead and use the buffer destructor to free the
DeckLink frame. This avoids a memcpy of the frame data.
Signed-off-by: NMarton Balint <cus@passwd.hu>

Temporarily keep the old method for ffmpeg_filters.c choose_pix_fmt and
avfiltergraph.c pick_format() until a paletted pixel format without alpha is
introduced.
Signed-off-by: NMarton Balint <cus@passwd.hu>

Signed-off-by: NMarton Balint <cus@passwd.hu>

Signed-off-by: NMarton Balint <cus@passwd.hu>

Signed-off-by: NMarton Balint <cus@passwd.hu>

The specs says that the the first color component in the color array is
not alpha, but simply 0.

Fixes 0 alpha of fate-suite/cvid/catfight-cvid-pal8-partial.mov
Signed-off-by: NMarton Balint <cus@passwd.hu>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>