Extracting the index of key frames from a video using ffmpeg

Question

Can you tell me the command for extracting the index of key frames from a video using ffmpeg in Windows. I tried

ffprobe -select_streams v -show_frames \-show_entries frame=pict_type \-of csv bbb480.avi \| grep -n I | cut -d ':' -f 1 > frame_indices.txt

but this error is displayed:

'grep' is not recognized as an internal or external command, operable program or batch file

Gyan · Answer 1 · 2016-07-08 15:06:15Z

On Windows, grep isn't available unless you install a package such as a port of coreutils.

Anyway, you can run

ffprobe in.mp4 -select_streams v -show_entries frame=key_frame,pkt_pts_time -of csv=nk=1:p=0 | findstr "1,"

Thank you sir for answering the question .But by using above command I am getting only key frame time instant not keyframe index.Can you please suggest the command for keyframe index. Thank you sir. — B Ganesh, Jul 28 '16 at 15:28

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