I've got two very large AVI files that are supposedly backup copies of one another. They differ in exactly one bit (yes bit, not even a byte):
Windows "fc /b" reports the following as the only difference:
3759B86F: B1 B3
ffmpeg -v error reports same errors on both. Otherwise they are:
Duration: 00:33:33.17, start: 0.000000, bitrate: 30317 kb/s
Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv411p, 720x480 [SAR 8:9 DAR 4:3], 29.97 tbr, 29.97 tbn, 29.97 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2 channels, s16, 1536 kb/s
They are huge (7,629,216,528 bytes - >7 GB) and I want to keep only the right one... but can't figure out which one it is...
EDIT I lied. ffmpeg reports same KINDS of errors BUT at different locations (03D... for one file and 03C... for another):
...>ffmpeg -v error -i file1.avi -f null -
[dvvideo @ 03D108E0] AC EOB marker is absent pos=64
Last message repeated 2 times
Last message repeated 2 times
[dvvideo @ 03D108E0] AC EOB marker is absent pos=67
[dvvideo @ 03D108E0] AC EOB marker is absent pos=69
[dvvideo @ 03D108E0] AC EOB marker is absent pos=64
Last message repeated 1 times
...>ffmpeg -v error -i file2.avi -f null -
[dvvideo @ 03C108E0] AC EOB marker is absent pos=64
Last message repeated 2 times
Last message repeated 3 times
[dvvideo @ 03C108E0] AC EOB marker is absent pos=67
[dvvideo @ 03C108E0] AC EOB marker is absent pos=69
[dvvideo @ 03C108E0] AC EOB marker is absent pos=64
Last message repeated 1 times
Note that the actual difference is at offset 3759b86f - not sure how that relates to ffmpeg locations but it seems to be well after them. On a side note, every time I run ffmpeg on the same file it reports different locations
EDIT 2 with more detail (-v verbose) ffmpeg reports that the error is at 00:26:11.64. The entire video is 00:33:33.17 and the one bit difference at ~12% of the length of the file. With CBR that would be at ~ minute 4.