Re: [Red5] Record as MP3, audio conferencing

Tue, 09 May 2006 10:47:27 -0700

Ben,

Not impossible... just not cheap or easy. 

From file format X to FLV with ffmpeg should be fine, assuming that ffmpeg can handle the codecs & file format of X. The other direction, from a Red5-stored FLV into, say, an MPG file with an MP3 audio track -- not as possible. The video would work, but the audio wouldn't be readable by ffmpeg.

There has been discussion of this on the ffmpeg lists, as I recall. It certainly would be possible to license the NellyMoser codec and add it to your own private version of ffmpeg, and it would then do what you need. But, you would have to be comfortable with the ffmpeg code. And I have no idea what the license fee for that would be. 

And, if Adobe were to release a command-line NellyMoser transcoding tool, you could simply use that as part of the post processing chain.

Rob


On May 9, 2006, at 1:22 PM, Ben Weekes wrote:

Does this mean that it will be impossible to capture audio via Red5 (or any FLASH server) and dynamically transcode it for other non flash purposes e.g. transmitting to a mobile phone?

 

My plan was to use FFMPEG etc to import / export Audio and Video to / from our video conferencing server (based on openH323)


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