[FFmpeg-devel] [PATCH] RealAudio SIPR @16k decoder (4/4) demuxer

Michael Niedermayer michaelni
Wed Sep 24 19:59:46 CEST 2008

On Wed, Sep 24, 2008 at 04:51:06PM +0200, Benjamin Larsson wrote:
> Hi.
> > Could you try the code with some damaged files? (created by tools/trasher or
> > some other tool)
> I ran:
> zzuf -c -r0.001:0.02 -s0:10000 -F5 -D0.5 -T60 -S ./ffmpeg -- -y -i
> intro.rm -acodec copy out.wav
> (file from mphq)
> And crashes started coming, none that I could relate to the extra code
> though.

> ------------------------------------
> s=10
> wav_write_header
> av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
>  s->streams[0]->codec->codec->name); with s->streams[0]->codec->codec
> being NULL
> I removed the lookup and it ran better.


> ------------------------------------
> At s=85 it crashed on a division by zero, block_align was 0 cause of
> sub_packet_size corruption. Added a check for nozero block_size at the
> end of rm_read_audio_stream_info fixed it.

a clean fix is welcome, checking block_align==0 for all codecs is likely
going to break some ...

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I hate to see young programmers poisoned by the kind of thinking
Ulrich Drepper puts forward since it is simply too narrow -- Roman Shaposhnik
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