[vlc-devel] Speex audio in .flv container

Baptiste Coudurier baptiste.coudurier at smartjog.com
Fri Aug 29 19:10:34 CEST 2008


Steven Woolley wrote:
> Hi all, I'm messing with the flash player 10 beta, which allows audio
> to be recorded in Speex format, but having a hard time converting it
> to anything else from the .flv.  I'm betting this will become a lot
> more common in the future given the openness and lack of patents for
> Speex vs. other flash audio codec's (nellymoser in particular).
> In a nutshell, speex in a .flv is new enough that noone supports it
> yet (and I'm not even sure the .flv's I'm generating are correct, but
> noone is, because until you have something that will read it, there's
> now way to say it's working or not!)
> All I do know is that both vlc and ffmpeg give "Unsupported audio codec" errors.
> So, a) is there any way to get vlc or ffmpeg to work with speex?  I am
> willing to do a custom compile, change code, etc. (if I knew where to start!)
> or b) failing that, how do I simply output the raw speex audio stream from
> the flv to a pipe or file? So I can decode it with the official speex stuff?

FFmpeg r15028 flv demuxer now supports speex.

It seems speex in flv does not embed extradata however (could not find
it in the file I got), so decoder might need some tweaking.

Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
Smartjog USA Inc.                                http://www.smartjog.com
Key fingerprint                 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA

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