[FFmpeg-user] Problem using H263 Encoder

Rhodri James rhodri at kynesim.co.uk
Thu Mar 22 18:34:42 CET 2012

On Thu, 22 Mar 2012 17:04:45 -0000, Tom Alter <tom1.alter at gmail.com> wrote:

> Hi All,
> I am using ffmpeg h263 encoder to encode the live stream and sending the
> encoded stream to peer over RTP. Solution works one start but slowly  
> video
> quality gets degraded with time. After two to three hours video gets
> blurred. I have tweaked with various settings of H263 Encoder but did not
> able to fix the problem.

All together now: command line and complete, uncut output missing :-)

> Is anyone there who can suggest the reason of this behaviour? Any help
> would be greatly appreciated.

It sounds like you are seeing small errors accumulate over a long time,
which suggests that the encoder isn't producing I-frames often enough
(or at all).  It's impossible to tell without more information, but
some combination of your target bit rate and encoder parameters may
be, er, optimistic.

Rhodri James
Kynesim Ltd

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