WebCam Uploaded FLV File Problems

Question

Hello,
I have a Flash project in which the user records a video with
their webcam in Flash. The video is transmitted to Flash
Communications Server as an FLV file, and I leave it there to be
played later.

1. Because I have the quality set high (90), the file is huge
(~80 KBytes/sec). Is there any way that I can compress the video
either client-side while it uploads or server-side when it gets
there?

2. One idea that I had was to transcode the video server-side
to another format in hopes of improving the compression.
Unfortunately, none of the transcoding or compression engines
recognize the FLV as a valid file. I tried On2, ffmpeg, Riva,
Sorenson, etc. The FLV does play ok and seems valid, but these
tools fail when trying to convert it.

Thanks very much for any help.

Anonymous · Answer

To decrease the bitrate, see the docs for camera.setMode, camera.setRate, and camera.setQuality.

Transcoding flv files created by FMS is a tough one. The problem is that the audio is encoded with Nellymoser's Asao codec, with is closed and proprietary. At the moment, the only way to leagally obtain the codec is to buy Nellymoser's conversion utility, whick comes with a hefty price tag.

See this site for links to flv to XXX conversion discussions:

http://nellymoser.codec.googlepages.com/

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