[MEncoder-users] Can you slow down mencoder?

[Pete Davis]

What version of mencoder are you using?

I believe 1.0pre7 has problem running multiple instances of mencoder
simultaneously. I know it was periodically causing me problems to run
multiple instances, but switching a more recent build (from CVS) fixed that.

Pete

> -----Original Message-----
> From: mencoder-users-bounces at mplayerhq.hu [mailto:mencoder-users-
> bounces at mplayerhq.hu] On Behalf Of Jonathan Lundberg
> Sent: Thursday, August 18, 2005 9:44 AM
> To: MEncoder usage discussions
> Subject: Re: [MEncoder-users] Can you slow down mencoder?
> 
> Hi guys,
> 
> Only looking at this situation again now after a few months hiatus..
> 
> Running the following script:
> 
> =================================
> #!/bin/sh
> 
> cd /root/grabs
> 
> DATE=`date`
> /bin/echo $DATE >> test.log
> 
> /bin/echo "Starting Capture" >> test.log
> 
> /usr/local/bin/mencoder  -noodml -tv  driver=v4l:width=352:height=288
> tv://  -o input  -ovc raw -oac pcm  &
> 
> /usr/bin/tee output1 < input | /usr/local/bin/mencoder -  -of avi
> -noodml -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1000 -oac lavc -o
> good.avi &
> 
> /usr/local/bin/mencoder output1 -of avi -noodml -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=250 -oac lavc -o bad.avi  &
> 
> sleep 5
> # Run Mplayer to monitor output
> mplayer bad.avi -nosound &
> mplayer good.avi -nosound &
> 
> ===================================
> 
> But every time, after 1079.6 seconds, both of the mencoders working on
> the fifo's die off like so:
> 
> Flushing video frames
> 
> Writing AVI header...
> Fixing AVI header...
> ODML: Aspect information not (yet?) available or unspecified, not
> writing vprp header.
> 
> Video Stream: 1000.525kbit/s etc etc
> Audio Strea: 224.000 kbit/s etc etc
> /usr/bin/tee: standard output: Broken pipe
> /usr/bin/tee: output1: Broken pipe
> 
> 
> and same for the 2nd encoder.. while the primary encoder capturing from
> the card continues on..
> 
> Any thoughts?
> 
> Cheers,
> 
> Jonathan
> 
> D Richard Felker III wrote:
> 
> >On Thu, Mar 10, 2005 at 09:24:02PM +0200, Oded Shimon wrote:
> >
> >
> >>On Thursday 10 March 2005 17:39, Martin Ankerl wrote:
> >>
> >>
> >>># start capturing
> >>>captureprog | tee testfilename.avi | mencoder settings-for-high-quality
> >>>cat testfilename.avi | mencoder settings-for-low-quality
> >>>
> >>>
> >>Whats the cat for?... That's redundant
> >>
> >>This is very hackish, but it does work and I don't see a better
> solution.
> >>You said your capture program is MEncoder, so:
> >>
> >>mkfifo input output1
> >>mencoder tv:// -endpos 30:00 -o input -ovc raw -oac pcm &
> >>cat input | tee output1 | mencoder - -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=100000 -oac pcm -o goodquality.avi &
> >>
> >>
> >
> >Do NOT use cat here. All it will do is increase cpu usage. Instead:
> >tee output1 < input | mencoder - -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=100000 -oac pcm -o goodquality.avi &
> >
> >
> >
> >>Change options as necessary obviously.
> >>Do NOT use mencoder for capturing directly to stdout and then to tee.
> >>MEncoder outputs too much garbage on stdout and on stderr.
> >>
> >>
> >
> >Very true.. :)
> >
> >Rich
> >
> >_______________________________________________
> >MEncoder-users mailing list
> >MEncoder-users at mplayerhq.hu
> >http://mplayerhq.hu/mailman/listinfo/mencoder-users
> >
> >
> >
> 
> 
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