So please do correct me if I am using the wrong commands. I still do not know what -copyts means (after reading the docs) and when I need to put -ss position before -i and when to put it at the output part. I have just heard of ffmpeg this morning. Let's take "extract a frame at exactly every minute" as an example, how can we get / what is the command to get the frames 00:00:00.000, 00:00:01.000, 00:00:02.000, and so on? Those are my findings from trials and errors this morning. (adding the "B" prefix is to prevent overwriting by different commands.)įor example, to grab a frame every second from 00:03:00 to 00:04:00, the commend is: ffmpeg -i "video.mp4" -start_number 0 -vf fps=1 -ss 00:03:00 -to 00:04:00 "C 00-03-%" That is why I name to filename as follow: ffmpeg -i "video.mp4" -start_number 0 -vf fps=1/60 "B 00-%" You will understand shortly.įor example, the command to grab a frame every minute, it is in fact extracting the frame at the half minute, which means the 00:00:30, 00:01:30, 00:02:30, and so on. I wrote some commands that grab a frame every hour, every minute, and every second.Īfter exterminating the images, the screenshots are in fact taken from the half hour, half minute, and half second. With reference from this webpage: Create a thumbnail image every X seconds of the video The video is length is 00:48:43.71 and 23.98 fps (we can think it is 24 fps, isn't it?). Motivation: I would like to seek the frame, then take high quality and exact time screenshots (images) from a video.
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