ffmpeg keyframe extraction in Windows - 【StackMirror】|video|ffmpeg

I had downloaded ffmpeg from this site : http://www.videohelp.com/tools/ffmpeg.

Can someone tell me how to extract keyframes from an flv, mp3 or mp4 video?

I tried this command that I found on the net :

ffmpeg -i Wildlife.wmv Desktop/img_%05d.jpeg

I got the error

could not open file : Desktop/img_%05.

Thank you.

video
ffmpeg

2012-04-05 01:52
by Pen Watson

The command you're looking for is:

ffmpeg -i INPUT.FLV -vf "select=key" key_frame_%d.jpg

See the ffmpeg documentation, especially the video filter selection on select, for more information.

2012-04-05 07:07
by blahdiblah

Thanks for replying. But Im getting an error : Access is denied. Whats the deal here - Pen Watson 2012-04-06 02:57

That sounds like a permissions problem, not something specific to ffmpeg. Do you have read access to the input movie and the directory you're writing the output to? Also, there was a slight mistake in my command, so that might've been what caused the error. Now fixed - blahdiblah 2012-04-06 03:18

Alright, I tried the new command you posted(the new one just didn'y have the path I think), the permission error went away and I get this error : "Output file was empty nothing was encoded(check --s/-t/--frames parameters if used)" - Pen Watson 2012-04-06 03:52