Le primidi 1er pluviôse, an CCXXIV, Etienne Desautels a écrit : > I'm analyzing/converting video from DVD .iso and I use dvd2concat for > this. For at least 2 DVD, when using dvd2concat, ffmpeg return a video > that is 1.5 x longer then the original. ffmpeg report the good duration in > the stream info at the start, but the wrong duration at the end of the > process. The problem is not present if I don't use dvd2concat (by > specifying .iso directly as the input or by specifying .VOB of the mounted > .iso). Also, video converted with the concat file will have the same frame > repeated for the extra duration (almost 5 min. in the case below).
There is so much in the VOB files of a DVD image that anything can go wrong, especially with so-called anti-piracy measures. Full-fledged players have counter-measures, but not simple tools. > file > 'subfile,,start,0,end,312870912,,:/home/mmac/iso/mountpoint/VIDEO_TS/VTS_01_1.VOB' > duration 00:04:57.734 > > file > 'subfile,,start,312870912,end,625534976,,:/home/mmac/iso/mountpoint/VIDEO_TS/VTS_01_1.VOB' > duration 00:04:57.433 I suggest you extract the given segments of this file into temp files and try to decode them to see if they match the declared duration. Regards, -- Nicolas George
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