[FFmpeg-devel] [PATCH 10/24] avcodec/mjpegdec: replace YUVJ pixel formats

[James Almer]

On 12/13/2017 4:22 PM, Michael Niedermayer wrote:
> On Wed, Dec 13, 2017 at 11:59:26AM +0100, Paul B Mahol wrote:
>> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>> ---
>>  libavcodec/mjpegdec.c                | 18 +++++++++---------
>>  libavcodec/tdsc.c                    |  2 +-
>>  tests/fate/vcodec.mak                |  4 ++--
>>  tests/ref/fate/api-mjpeg-codec-param |  4 ++--
>>  tests/ref/fate/exif-image-embedded   |  2 +-
>>  tests/ref/fate/exif-image-jpg        |  2 +-
>>  6 files changed, 16 insertions(+), 16 deletions(-)
> 
> this breaks ffplay playing a mjpeg in avi
> 
> ./ffmpeg -i matrixbench_mpeg2.mpg -vcodec mjpeg -t 0.5  -qscale 1 mjpeg.avi
> ./ffplay mjpeg.avi
> 
> the output of ffplay looks darker than it should be

Without this patch swscale emits a warning about deprecated pixel
format. With it, the warning is gone.

Guess swscale needs to be adapted in some way before the same is done to
the decoders?