How set limit to output bandwidth

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erotavlas_turbo
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How set limit to output bandwidth

Postby erotavlas_turbo » 12 Mar 2010 19:16

Hi,

I know the vb parameter is used to set the output video bandwidth. If I try to set vb=100, the output video always requires 350 kbps. Why?

These are my command line parameters

Code: Select all

vlc image.jpg --sout '#transcode{vcodec=H263p,fps=1,width=352,height=288,vb=100,acodec=none}:duplicate{dst=rtp{dst=195.223.177.46,port-audio=11318,port-video=16444}}'
Thank

Rémi Denis-Courmont
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Re: How set limit to output bandwidth

Postby Rémi Denis-Courmont » 13 Mar 2010 09:24

Not all encoders implement all bit rate values.
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erotavlas_turbo
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Re: How set limit to output bandwidth

Postby erotavlas_turbo » 13 Mar 2010 09:29

Ok, so only H264 implement bit rate variable. Where can I find the bit-rate value for H263p?

erotavlas_turbo
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Re: How set limit to output bandwidth

Postby erotavlas_turbo » 14 Mar 2010 19:23

Ok, so only H264 implement bit rate variable. Where can I find the bit-rate value for H263p?
The H264 codec implements VBR very well. I can set through the vb parameter the bandwidth value and the video changes accordingly. The H263p doesn't care about the vb parameter. If I try to change vb the results don't change. Is this a implementation choice?

Rémi Denis-Courmont
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Re: How set limit to output bandwidth

Postby Rémi Denis-Courmont » 14 Mar 2010 21:29

You'd have to ask FFmpeg people if you want to know about their design choices.
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erotavlas_turbo
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Re: How set limit to output bandwidth

Postby erotavlas_turbo » 15 Mar 2010 08:38

Ok, thank you for your support

erotavlas_turbo
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Re: How set limit to output bandwidth

Postby erotavlas_turbo » 15 Mar 2010 11:05

How can I use FFmpeg encoding parameters inside VLC?


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