[FFmpeg-devel] Past Duration too large

[Nicholas Robbins]

It seems like this is more an ffmpeg-user question. I asked there and got no responses.

During some of my encodes, I get quite a lot of these warnings.

What do they mean?

For example: here is a chuck of the output I am talking about

Past duration 0.998009 too large=  718546kB time=01:33:23.23 bitrate=1050.5kbits/s dup=0 drop=7
Past duration 0.994011 too large
Past duration 0.990013 too large
Past duration 0.999992 too large
Past duration 0.995995 too large
Past duration 0.991997 too large
Past duration 0.987999 too large
Past duration 0.998009 too large
Past duration 0.994011 too large
Past duration 0.990013 too large=  718665kB time=01:33:24.54 bitrate=1050.5kbits/s dup=0 drop=7

that repeats pretty much constantly. In a 1h48m encode, it happens 42417 times.

What is this telling me?

The command is:

/usr/bin/ffmpeg -hide_banner -benchmark -i laptop.film.mkv -map 0 -c:a copy -c:s copy -c:v libx264
-preset veryfast -crf 17 -r 24000/1001 laptop.mkv


the input file is a mkv with ntsc-film material claiming to be ntsc rate. (23.97 framerate per the frames, but container thinks it is 29.97 fps)


I can provide the uncut output if that is helpful.

-Nick