[FFmpeg-user] Can FFMPEG output multiple files with one command runs?

Zhen Ma alex.zhen.ma at gmail.com
Fri Nov 4 17:47:08 CET 2011

Thanks Robert !  It works like your mentioned.  But It turns out another
problem for me .  I am trying to do the 2pass encoding.  So the first
multiple line encoding command would be like that:

ffmpeg -y -i youtube_480.flv -pass 1 -stats 1 -f mp4 -s 864x480 -aspect 1.8
-r 25 -threads 0 -vcodec libx264 -b 600k -maxrate 600k -fpre
presets/main.ffpreset -an /dev/null -pass 1 -stats 2 -f mp4 -s 432x240
-aspect 1.8 -r 25 -threads 0 -vcodec libx264 -b 300k -maxrate 300k -fpre
presets/baseline.ffpreset -an /dev/null -pass 1 -stats 3  -f mp4 -s 320x180
-aspect 1.8 -r 25 -threads 0 -vcodec libx264 -b 200k -maxrate 200k -fpre
presets/baseline.ffpreset -an /dev/null

But the problem is the x264_2pass.log which was generated with first pass
of first sub-command was overwirtten by the second and third sub-command.
I was trying to find the way to specify the name of log file. I can only
see x264 has parameter stats which allows us to change the name of log
file, but by looking at the ffmpeg ,it seems it doesn't implement this
parameter in ffmpeg command line.

I don't know if you know something about it , how can I change the name of
pass log file with ffmpeg command line?

Thank you very much!

2011/11/3 Robert Krüger <krueger at lesspain.de>

> On Nov 3, 2011, at 22:09 , Zhen Ma wrote:
> > Hey guys,
> >
> > Is it possible to run one command  to output multiple files?  for
> example ,
> > I would like to covert one video into 3 videos format ,each video has
> > different video codec, different bitrate and different resolution.
> yes, just specify the output files one after the other, always keeping the
> arguments before the next output file, i.e.
> ffmpeg <infile options> -i <infile> <outfile 1 options> <outfile 1>
> <outfile 2 options> <outfile 2> ..... <outfile N options> <outfile N>
> e.g.
> ffmpeg -i input.mpg -vcodec mjpeg -acodec copy out1.mov -vcodec mpeg2video
> -acodec mp2 out2.avi .......
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Your sincerely !
Alex Zhen Ma
▪ Email: alex.zhen.ma at gmail.com
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