[FFmpeg-user] AVCHD from a Canon HF G10: 'non monotonically increasing dts' + dts mess

[Damian Stewart]

Hi all,

I'm trying to convert a number of AVCHD 1080i 50fps videos from a Canon HF G10 to mp4/mov container format, but ffmpeg is failing with a 'non monotonically increasing dts' error message at the start of each one. I'm on Mac OSX 10.6, I've tried both ffmpeg 0.8.0 (compiled by Homebrew) and 0.8.2 (compiled by ./configure && make).

Here's the commandline. The file is here: http://frey.co.nz/share/00167.MTS (2.2MB)

$ ffmpeg -i 00167.MTS -vcodec copy -acodec copy out/00167.mp4

Output fails with:

Input #0, mpegts, from '00167.MTS':
  Duration: 00:00:01.44, start: 0.483578, bitrate: 12967 kb/s
  Program 1 
    Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
...
[mp4 @ 0x101071200] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 1 >= 1

If I run ffprobe, the timestamps seem to be scrambled:

$ ffprobe -show_packets 00167.MTS | grep dts

...
dts=47119
dts_time=0.523544 
dts=49999
dts_time=0.555544 
dts=52879
dts_time=0.587544 
dts=55759
dts_time=0.619544 
dts=43519
dts_time=0.483544 
dts=45319
dts_time=0.503544 
dts=47119
dts_time=0.523544 
dts=48919
dts_time=0.543544 
dts=50719
dts_time=0.563544 
dts=58639
dts_time=0.651544 
dts=52519
dts_time=0.583544 
...
dts=75919
dts_time=0.843544 
dts=75919
dts_time=0.843544 
dts=78799
dts_time=0.875544 
dts=77719
dts_time=0.863544 
dts=79519
dts_time=0.883544 
dts=81679
dts_time=0.907544 
dts=81319
dts_time=0.903544 
dts=83119
dts_time=0.9


What's going on here? Is my camera really putting out such scrambled timestamps? Is there anything I can do about it?

Any help appreciated.

Cheers,
Damian

--
damian stewart . @damian0815 .  damian at frey.co.nz
frey . contemporary art . http://www.frey.co.nz