[FFmpeg-user] "corrupt decoded frame"

[Rob Hallam]

On Thu, 14 Aug 2025 at 19:19, Mark Filipak via ffmpeg-user
<ffmpeg-user at ffmpeg.org> wrote:
>
> On 14/08/2025 02.55, Paul B Mahol via ffmpeg-user wrote:
> > see -xerror flag ?
> >
> > On Wed, Aug 13, 2025 at 10:08 PM Mark Filipak <markfilipak.imdb at gmail.com>
> > wrote:
> >
> >> Here are two notices out of hundreds like them. They are in an FFREPORT
> >> log.
> >>
> >> =====
> >> [h264 @ 00000000198b8040] concealing 7744 DC, 7744 AC, 7744 MV errors in
> >> P frame
> >>
> >> [vist#0:0/h264 @ 0000000006fc2e00] [dec:h264 @ 0000000005a0fc80] corrupt
> >> decoded frame
> >> =====
> >>
> >> FFmpeg continued as though nothing had happened. The resulting video had
> >> some seriously f'ed-up frames.
> >>
> >> The lines above are seen only if one makes and views an FFREPORT log.
> >>
> >> To state this clearly: When such errors happen, I want FFmpeg to tell
> >> me, and I want FFmpeg to immediately stop, abort. How can I get FFmpeg
> >> to do that? to do what I want? to stop and tell me?
> >> see -xerror flag ?
>
> I tried it. It's too blunt an instrument, Paul. It aborts on even
> trivial errors. Let me explain...

There are also various flags to the err_detect option [1] which could
be tried; and -max_error_rate, but that only lets you set a threshold
for detection after the fact [2].

I haven't seen a way to get ffmpeg to exit on a specific error, or to
ignore a specific error.

If the monotonic DTS error is i) the sole other error reported and ii)
you definitely don't care about it: it would be possible to modify the
source and recompile ffmpeg to stop it doing so. I am no expert in
either C or the ffmpeg source so I would welcome correction, but the
conditional on line 188 of ffmpeg_mux.c [3] looks like the one you
would need to remove.

Alternatively, you could go the other way: find "corrupt decoded
frame" and add a line there to cause ffmpeg to always exit if so.

Cheers,
Rob

[1]: https://ffmpeg.org/ffmpeg-formats.html#toc-Format-Options
[2]: https://ffmpeg.org/ffmpeg-all.html#toc-Advanced-options
[3]: https://github.com/FFmpeg/FFmpeg/blob/a7c8c4ee1ce1f0d66953ec1d924ab9c48ee14199/fftools/ffmpeg_mux.c#L188