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List:       mjpeg-users
Subject:    Re: [Mjpeg-users] Converting vnc session to a movie file.
From:       Bernhard Praschinger <shadowlord () utanet ! at>
Date:       2009-09-29 16:50:27
Message-ID: 4AC23AD3.7090509 () utanet ! at
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Hallo

Nagalenoj H. wrote:
> It's working great. Thanks. The video is clear. Finally, I've executed 
> the command as
> ./rfbproxy -x ../../files/q3.fbs | ppmtoy4m -S 420jpeg | mpeg2enc -b 
> 10000 --no-constraints -f 3 -4 1 -2 1 -q 4 -P -N 1.0 -M 2 -E -10 -D 10 
> -a 2 -o video.mp2
> 
> and
> 
> ./rfbproxy -x ../../files/q3.fbs | ppmtoy4m -S 420jpeg |mpeg2enc -f 3 -q 
> 4 -b 10000 --no-constraints -o video1.mp2
> 
> 
> The fbs file has one minute session(video). When I execute this command, 
> It is taking around 4 minutes to convert fbs file to mp2. I feel this is 
> quiet unfair, so is there any options to reduce this conversion duration 
> without any loss in video.?
How many cores do you have in your computer ?
The -M 2 (or 4) helps. Is there a program in the pipeline that uses 100% 
of one CPU ?

Did you run the pipeline with the time program ? So you know how much 
time each program consumes (should work):
time ./rfbproxy -x ../../files/q3.fbs | time ppmtoy4m -S 420jpeg | \
time mpeg2enc -f 3 ...

You might gain some speed by using a buffer program like bfr:
http://www.glines.org/software/bfr
You use it in a way like that:
./rfbproxy -x ../../files/q3.fbs | ppmtoy4m -S 420jpeg | \
bfr -b 64M | mpeg2enc ...

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: shadowlord@utanet.at
www: http://www.lysator.liu.se/~gz/bernhard

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