[FFmpeg-devel] [ogg] Respect AVERROR codes returned by ogg header parsing.

[Dale Curtis]

On Tue, Nov 28, 2017 at 4:32 PM, Michael Niedermayer <michael at niedermayer.cc
> wrote:
>
>
> This breaks converting of this:
> ./ffmpeg -i bgc.sub.dub.ogm -vf subtitles=bgc.sub.dub.ogm -an  file.avi
>
> https://samples.ffmpeg.org/ogg/bgc.sub.dub.ogm
>
>
That's due to the vorbis parser returning AVERROR_INVALIDDATA here, with
pkt_type == 5 and priv->packet[0] == priv_packet[1] == null.
http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/oggparsevorbis.c;h=65b1998a02d92d0fcaeb740d8f4523641502dbea;hb=HEAD#l319


Which were added in 2010 here:
http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=73c44cb2869bfdbea829942eb35efa6d4c4e2f91

It seems that file has invalid vorbis streams if the check is to be
believed. What do you want to do here? Restrict this error behind
AV_EF_EXPLODE?

- dale