How can I get the frame number closest to a given time (relative to the start of the video) using ffmpeg? The video has variable frame rate. I do not need any other metadata or the actual frame (image) itself. Speed is more important than precision (unless the possible error is more than a couple of seconds).
Example:
Input
Output
ffmpeg -t 01:05 -i input.mp4 -nostats -vcodec copy -y -f rawvideo /dev/null 2>&1 | grep frame | awk '{print $2}' | tr -d ,
This ffmpeg command takes your input.mp4, truncates it to -t (in the example above 01:05, and writes the file to /dev/null. the -y overwrites whatever is on /dev/null.
The grep command grabs the number of frames.
INPUT:
ffmpeg -t 01:05 -i baywatch.mp4 -nostats -vcodec copy -y -f rawvideo /dev/null 2>&1 | grep frame | awk '{print $2}' | tr -d
OUTPUT:
1559