Extracting keyframes

[Frigo]

Is there any way to extract all keyframes into separate image files from a video ? (Without manual intervention, of course)

Thank you in advance for your answers :)

[setarip_old]

What is the format of the video (AVI, MPEG, etc.)?

[Frigo]

Well, I have the videos mainly in MKV container with H.264 codec, but there are XviD, DivX codecs too, and some AVI files and DVD rips.

Though a solution to any of these formats would be a huge help.

[setarip_old]

All of the .AVIs that you've created, whether using DivX, XviD, or another codec, can be readily handled by using the "Frame Decimation" function in VirtualDub (Click on the "Video" dropdown menu,then select "Frame Rate")

[Frigo]

Meanwhile I found the ultimate way to do it.

mplayer filename -benchmark -nosound -noaspect -noframedrop -ao null -vo png:z=6 -vf framestep=I

Thanks anyway :)