In 16x8 motion compensation, for lower 16x8 region, the input to mpeg_motion() for motion_y was "motion_y + 16", which causes wrong rounding. For 4:2:0, chroma scaling for y is dividing by two and rounding toward zero. When motion_y < 0 and motion_y + 16 > 0, the rounding direction of "motion_y" and "motion_y + 16" is different and rounding "motion_y + 16" would be incorrect.

We should input "motion_y" as is to round correctly. I add "is_16x8" flag to do that.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: out of array access
Fixes: 5919/clusterfuzz-testcase-minimized-5859311382167552
Fixes: special case for theora (untested due to lack of sample)

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

Fixes: OV_decode_plane.avi
Found-by: GwanYeong Kim <gy741.kim@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: OOM
Fixes: 5549/clusterfuzz-testcase-minimized-5390553567985664

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

Fixes: 5540/clusterfuzz-testcase-minimized-6122458273808384

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

For B field pictures, the spec says,

> The prediction shall be made from the field of the same parity as the field being predicted.

I did it.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes breakage with --disable-muxers as it was originally limited
to the muxer, and not the demuxer.

An index should never be equal to the count. Hence we must make sure
*ctts_index < ctts_count.
Reviewed-by: Sasi Inguva <isasi@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Should fix https://ffmpeg.org/pipermail/ffmpeg-devel/2018-February/225066.htmlSigned-off-by: Muhammad Faiz <mfcc64@gmail.com>

Should fix https://ffmpeg.org/pipermail/ffmpeg-devel/2018-February/225058.htmlSigned-off-by: Muhammad Faiz <mfcc64@gmail.com>

Use bsearch on avcodec_descriptor_get().
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

Reviewed-by: Steven Liu <lq@onvideo.cn>

Fixes: Timeout
Fixes: 5487/clusterfuzz-testcase-4696837035393024

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegReviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This reverts commit cdc78058.

It introduced several issues in the command line tools, and it's
implementing a new API that may still see some changes.
Revert for the time being until the state of the API is defined.
Signed-off-by: James Almer <jamrial@gmail.com>

Reviewed-by: Muhammad Faiz <mfcc64@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

If a subdemuxer has the updated metadata event flag set, the metadata is copied
to the corresponding stream. The flag is cleared on the subdemuxer and the
appropriate event flag is set on the stream.
Signed-off-by: wm4 <nfxjfg@googlemail.com>

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

It's not needed, and fixes compilation with network disabled.
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

avcodec bump missed in 7e8eba2d
avformat bump missed in ff46124b and
0694d870
avdevice bump missed in 0fd47570Signed-off-by: James Almer <jamrial@gmail.com>

Demuxing only. Muxing is disabled as altref frame handling is not
defined in the spec, and there's no way to know the presence of
such frames during stream initialization.

Based on a patch by Steven Liu.

Fixes ticket #7000
Reviewed-by: Carl Eugen Hoyos <ceffmpeg@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

Fixes misdetection of sbQ9.bin
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Signed-off-by: Menno <mrdegier@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This also adds an avpriv function to register devices in
libavformat