[FFmpeg-user] resolution problem with recording from webcam

Jeff L jeffreylaut at gmail.com
Fri Mar 23 14:25:37 CET 2012

Andrey Utkin wrote
> 2012/3/23 Jeff L <jeffreylaut@>:
>> I am trying to record webcam (logitech pro 9000) video using ffmpeg... If
>> I
>> use cheese, the webcam will record at whatever resolution I tell it to.
> What is cheese?
>> If I use the following command;
>> ffmpeg -t 10 -f video4linux2 -s 1280x720 -r 9 -i /dev/video0 -an
>> webcam.avi
> Why do you have _two_ inputs?
> Why do you set explicitly the resolution?
>> The webcam will record, and I'll have a video that is 1280x720 in size,
>> but
>> the quality is crap. It looks like it is just stretching a low resolution
>> image to be 1280x720. Recording with cheese it looks great. I can't seem
>> to
>> figure out why.
>> Any ideas?
> Stick with single video input, and use "-c copy".
> -- 
> Andrey Utkin
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cheese is a webcam recording program.

I have two inputs?  I thought that /dev/video0 was my only input....

I explicitly set the resolution because it was using the default framerate
(25 fps I think?).  I thought that maybe it was using a lower image
resolution to get that framerate, so I tried lowering it to something
reasonable for that framesize.

"-c" doesn't seem to be an option for me, but if I use "-vcodec copy", it
seems to do the trick.  Thanks!

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