[vlc-devel] transcoding network stream bugs

[Ricardo Kleemann]

Hi,

I'm accessing a network stream from Windows Media Encoder (vcodec is WMV3 acodec is wma2) and trying to transcode it via VLC to broadcast it out.

The problem is that no matter what I specify for the vb, the broadcast stream always has a much larger bitrate.

For example, the encoded stream I'm accessing from WME is 80K for video and 20K for audio. Then I try to broadcast it as follows:

--sout '#transcode{vcodec=WMV2,vb=80,acodec=mp3,ab=20,samplerate=22050,channels=2}:standard{access=mmsh,mux=asf,dst=:8010}'

(I also tried transcoding to vcodec DIV3)

Basically what I'm doing is copying the same bitrates of the WME output.

However, what I get streamed on 8010 is a video stream that is in excess of 500K bitrate. If I remove the vb=80, then it's even worse, the bitrate streamed goes up to > 1500K. 

This is on linux, 0.8.6-test1, but I behaves the same in previous versions of VLC.

Looks like VLC is not being able to detect the original bitrate? Why does it output such a high bitrate if I'm forcing it to a certain bitrate using the vb parameter?

Thanks for any help
Ricardo
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