Extract still image/frames from avi/mpg

[bigbadguy]

I am looking for command line tools to script the process of extracting some still images/frames from a given avi/mpeg.

I had tried ffmpeg, which allow me to extract some gif ... but the quality crap... (may be i use the wrong switch ....)

Any advice will help Thx

[bigbadguy]

seems like VLC and ffmpeg (i tried an old version before... but actully all newer version) actually can do...

for VLC

vlc -V image --image-out-format jpeg --image-out-ratio 200 --image-out-prefix xxxx /usr/file.mpg

[bigbadguy]

final version...

for really small thumbnail
ffmpeg -y -i x.avi -vframes 1 -ss 00:00:10 -an -s 120x90 -qmin 20 x%d.jpg

for high quality output
ffmpeg -y -i x.avi -vframes 1 -ss 00:00:10 -an -vcodec png -f rawvideo -s 320x240 x.png