This answer to the question
How to extract one frame of a video every N seconds to an image? also shows how to number the output image filenames with %0xd
ffmpeg -i inputFile.mp4 -r 1 outputFile_%02d.png
I would like to know how I can get a timestamp instead (minutes_seconds offset from beginning), for example, the frame @ 5 min 23 sec 98 ms should be written to the file
outputFile_05_23_98.png
-frame_pts
option in the image muxer. You may have to adjust theround
option for the fps filter.