[FFmpeg-devel] [PATCH] avcodec/mjpegdec: Try to continue decoding on zero quant matrix value

[Andriy Gelman]

On Sun, 04. Jul 21:28, Michael Niedermayer wrote:
> On Sat, Jul 03, 2021 at 12:25:28PM -0400, Andriy Gelman wrote:
> > From: Andriy Gelman <andriy.gelman at gmail.com>
> > 
> > A zero value in the quantization matrix is invalid but in practice will
> > just set the transform coefficient to zero after inverse quantization.
> > Try to continue decoding if the AV_EF_EXPLODE flag is not set.
> > 
> > Fixes ticket #9287.
> > 
> > Signed-off-by: Andriy Gelman <andriy.gelman at gmail.com>
> > ---
> > 
> > The last frame in the sample of the ticket does not decode because the
> > input file appears truncated.
> > Something like the following patch would still be needed to output the final
> > frame:
> > https://patchwork.ffmpeg.org/project/ffmpeg/patch/20210627135307.14008-1-michael@niedermayer.cc/
> > 
> >  libavcodec/mjpegdec.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)

> 
> LGTM
> 

Thanks, will apply.

-- 
Andriy