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I want to extract a single frame from an AVI file - from the command
line.
I found out that my best bet is to use mjpegtools, but I didnt
understand how to use this complex tool.
Can some good soul help me by giving me the correct command line?
Thanks!
Alessandro Magni
On 1 Jan 2005 12:00:07 -0800, Alythh staggered into the Black Sun and
said:[color=blue]
> I want to extract a single frame from an AVI file - from the command
> line. I found out that my best bet is to use mjpegtools, but I didnt
> understand how to use this complex tool.[/color]
"man mjpegtools" is a good start. The person who wrote the man page
didn't speak English natively, so it's a little garbled, but there's a
command line that looks useful at about line 1612.
[color=blue]
> Can some good soul help me by giving me the correct command line?[/color]
lavtrans -f i -i $NUM -o test.jpg test.avi
$NUM is the frame number of the frame you want.
You can also use mplayer to do this, which may work better than
mjpegtools. Like so:
mplayer -vo jpeg -ss 1:00 -frames 1 file.mov
....-ss is the start position, which is 1 minute here. Many people find
dealing with minutes/seconds easier than calculating frame numbers, but
YMMV. HTH,
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