'ffmpeg generate timecode list from concatenated sequence of videos

how do i get a list of the Timecodes (from the source) in a merged video?

for example:

# filelist.txt:
# file cat.mp4
# file dog.mp4
# file duck.mp4

ffmpeg -f concat -i filelist.txt -c copy animals.mp4

each source video is one minute long:

# videoindex.txt:
00:00 cat
01:00 dog
02:00 duck

how is it possible to generate such an index file for the jointed video file?

list video indexing ffmpeg

Sources

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