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I'm using avprobe to get information about timecode and fps from videos. Getting the information isn't a problem but I'm a bit confused as to the result. When running avprobe on an H.264 file I'm seeing fps listed at 25 and the duration of the clip as 00:03:29.81. My understanding is that the number after the decimal point is frames, but this doesn't make sense since it's 25 fps.

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In ffmpeg and avconv, the number after the decimal point is in fractions of a second, i.e. centiseconds if given with two digits.

[-][HH:]MM:SS[.m...]

HH expresses the number of hours, MM the number of minutes for a maximum of 2 digits, and SS the number of seconds for a maximum of 2 digits. The m at the end expresses decimal value for SS.

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