[FFmpeg-devel] [PATCH v1] avcodec/av1_parser: ensure only one show frame packed data parsered

[Wang, Fei W]

On Fri, 2021-12-03 at 11:51 +0100, Michael Niedermayer wrote:
> On Fri, Dec 03, 2021 at 04:09:20PM +0800, Fei Wang wrote:
> > Split packed data when it contains multiple show frames in some
> > non-standard bitstream. This can benefit downstream decoder which
> > can
> > decode continuously instead of interrupt with unexpected error.
> > 
> > Signed-off-by: Fei Wang <fei.w.wang at intel.com>
> > ---
> >  libavcodec/av1_parser.c | 19 +++++++++++++++----
> >  1 file changed, 15 insertions(+), 4 deletions(-)
> 
> This results in a infinite loop
> 
> endlessly displaying
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.
> [av1 @ 0x55f62c2a6a00] Invalid OBU length: 1071323, but only 768
> bytes remaining in fragment.
> [av1 @ 0x55f62c2a6a00] Failed to parse temporal unit.

Thanks Michael to catch this. Will check it soon.

Fei
Thanks

> 
> i will send you the testsample privatly
> 
> thx
> 
> [...]
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