[MEncoder-users] Can you slow down mencoder?

[Jonathan Lundberg]

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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