Use the keyframes output above as input to ffmpeg.The output is comma-delimited string of keyframes. Use ffprobe and awk to identify the keyframes as close as possibleįfprobe -show_frames -select_streams v:0 \Īwk 'BEGIN print str.Using a newer build of ffmpeg, can achieve this by using ffprobe and the ffmpeg segment muxer. Proceeding this way, I was able to have an efficient and robust way to split the video at key frames. I tried setting the keyintmin as 25 to make sure there is a amximum of 1 keyframe per second. So far all the commands I have tried do not extract keyframes but return all the frames ie 25fpstotal time number of frames in the output. ffprobe -show_frames -select_streams v -print_format json=c=1 0001.wmvįrom the output of ffprobe get the pkt_dts_time of the frame just before that key frame.įfmpeg on the exported chunk of step 1, specifying the same input and output file, and specifying -ss 00:00:00 and -t. I have been trying to extract keyframes from video using ffmpeg 0.11.1. Choose closest keyframe after desired chunk size. Use ffprobe to find where the keyframes are. I use the above command it cuts my movies not at closest keyframes. ffmpeg -i source.wmv -ss 00:00:00 -t 00:00:06 -acodec copy -vcodec copy -async 1 -y 0001.wmv ffmpeg -noaccurateseek -i input.mp4 -ss 1 -t 3 -acodec copy -vcodec copy -y out.mp4. Because ffprobe is very verbose and can take several seconds or even minutes to output all key frames and there is no way to scope the range of frames we want from a lengthy video, I proceed into 5 steps:Įxport a video chunk from the original file, around the double of the desired chunk size. However, I dont know how to replace the single left over keyframe with a custom PNG, any help is appreciated To be clear, I dont want to overwrite simply using. Here is the solution that I could get to work:Īs suggested by av501 and d33pika, I used ffprobe to find where the key frames are.
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