[FFmpeg-user] ac3 to mp3 converting bug

Michael Niedermayer michaelni at gmx.at
Thu Jul 5 15:43:18 CEST 2012

On Thu, Jul 05, 2012 at 11:44:33AM +0200, Ingo Brückl wrote:
> Clément Boesch wrote on Wed, 4 Jul 2012 20:19:59 +0200:
> > Can you run a valgrind before & after the -af patch? It might give more
> > information.
> I haven't used valgrind before, but it actually seems to hint to the problem:
>   vex x86->IR: unhandled instruction bytes: 0x66 0xF 0x61 0xC2
>   ==16881== valgrind: Unrecognised instruction at address 0x8791031.
>   ==16881==    at 0x8791031: ??? (audio_convert.asm:387)
> And, indeed, after compiling ffmpeg with --disable-yasm everything is fine
> again.
> On Tue, 03 Jul 2012 17:34:43 I've asked:
> > Is there some assembler code that is in effect now and wasn't before and
> > has some SSE1-only related issues?
> It seems that something like that might be the case with my AMD Athlon XP.
> Is that enough information to fix the bug or shall I provide further
> information?

please retry, should be fixed.

Also we need fate clients for (fate.ffmpeg.org) that lack SSE2 or
other modern things so such issues are caught earlier.

If you or someone else could spare some cpu cycles and run a fate
client per cronjob or occasionally this would be very helpfull for
detecting this kind of bugs early

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Freedom in capitalist society always remains about the same as it was in
ancient Greek republics: Freedom for slave owners. -- Vladimir Lenin
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