Hi,
I have come across this regardless of video format:
ffmbc -i ~/tmp/samples/software/fcp_7/prores/fcp7_prores_hq_1080_25p_2s.mov
-vcodec prores -an -r 50 50test.mov
FFmbc version 0.7-rc7
Copyright (c) 2008-2012 Baptiste Coudurier and the FFmpeg developers
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'/Users/krueger/tmp/samples/software/fcp_7/prores/fcp7_prores_hq_1080_25p_2 s.mov':
Metadata:
major_brand: qt
minor_version: 537199360
compatible_brands: qt
creation_time: 2012-05-24 12:42:17
com.apple.finalcutstudio.media.uuid:
AFFD54A5-936C-42FF-AEDA-31AF3F0ACFED
timecode: 01:00:00:00
Duration: 00:00:02.00, start: 0.000000, bitrate: 94526 kb/s
Stream #0.0(eng): Video: prores, yuv422p10le, 1920x1080p, 92946 kb/s,
PAR 1:1 DAR 16:9, 25.00 fps
Metadata:
codec_name: Apple ProRes 422 (HQ)
Stream #0.1(eng): Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
Stream #0.2(eng): Data: unknown (tmcd)
Output #0, mov, to '50test.mov':
Metadata:
encoder: FFmbc 0.7
Stream #0.0(und): Video: prores, yuv422p10le, 1920x1080p [PAR 1:1 DAR
16:9], 367001 kb/s, 50.00 fps
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
frame= 99 fps= 27 q=1.0 Lsize= 43781kB time=00:00:01.98
bitrate=181137.6kbits/s dup=49 drop=0
video:43779kB audio:0kB global headers:0kB muxing overhead 0.003395%
Roberts-MacBook-Pro:FFmbc-0.7-rc7 krueger$ ./ffmbc -i 50test.mov
FFmbc version 0.7-rc7
Copyright (c) 2008-2012 Baptiste Coudurier and the FFmpeg developers
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '50test.mov':
Metadata:
major_brand: qt
minor_version: 0
compatible_brands: qt
creation_time: 2012-11-05 07:58:25
encoder: FFmbc 0.7
Duration: 00:00:01.98, start: 0.000000, bitrate: 181137 kb/s
Stream #0.0(eng): Video: prores, yuv422p10le, 1920x1080p, 181131 kb/s,
50.00 fps
Metadata:
codec_name: prores
At least one output file must be specified
You can see that one frame was lost by looking at the duration and the
output. It should read "dup=50" but it's "dup=49", i.e. one frame of the
50 input frames was not duplicated.
Regards,
Robert
