[FFmpeg-devel] [PATCH] fix crash in realmedia demuxer

Ronald S. Bultje rsbultje
Mon Dec 29 18:07:37 CET 2008


On Mon, Dec 29, 2008 at 8:25 AM, Ronald S. Bultje <rsbultje at gmail.com> wrote:
> On Mon, Dec 29, 2008 at 3:19 AM, Jai Menon <jmenon86 at gmail.com> wrote:
>> You could try this sample ->
>> http://talkischeap.com/audio/TalkisCheap/RA/fly_me_ss.rm
>> I believe it has multiple audio streams.
> It has 6 audio streams, and (I've never seen that before) an ASM
> rulebook for bitrate selection, in the actual .rm file. I'll have a
> look, very interesting. (Note: it no longer crashes, but doesn't sound
> right for some tracks.)

I don't think the ffmpeg RM demuxer has any code to deal with these
kind of multirate files. ./ffplay -ast 4 works, that's the only
non-multirate track in it, all other tracks are multirate and don't
work. I don't know what that means, mplayer can play track 0-3 and 5,
but not track 4 (apparently it does either only multirate for
multirate files, or only non-multirate for plain files, but not both
for multirate files).

Maybe whoever added multirate support to the mplayer demuxer could
port that to ffmpeg, or sort of explain what it means (or both)? I'm
not quite sure what the difference is, but I didn't really look very


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