Thanks for weighing in, I guess I will have to try various combinations of operating system and FFMPEG releases to get to the bottom of this.
As a last resort I could imagine myself editing the ffmpeg plug-in source code. I would also try to add variable speed playback (without audio, as this would require audio resampling) Christian 2014-12-09 14:52 GMT+01:00 Robert Osfield <[email protected]>: > Hi Christian, > > I have just tried your video with osgmultiplemovies with svn/trunk but it > comes out black. I run the same movie in osgmovie it comes out fine > though. No stats though so doesn't reveal any particular problem. > > I'm not the author of the ffmpeg plugin so I can't provide any particular > insights off the top of my head. > > Robert. > > On 9 December 2014 at 13:31, Christian Buchner < > [email protected]> wrote: > >> Hi, >> >> the OSG 3.2 seems to have a problem with reported timestamps while >> replaying movies. I haven't tested never OSG development versions yet. The >> issue occurs close to the end of an MP4 file. >> >> The timestamp wraps around back to 0 before the end of the file is played >> out. There are also side effects, like the playout stopping temporarily >> until the wrapped around timestamps has caught up. >> >> I suspect this is due to ffpmeg having pre-buffered all data to the end >> of the file, and wrapping back around to 0 to re-buffer from the start of >> the file. But at that point the playout of the file hasn't finished yet, >> but the plug-in already reports timestamps of 0. >> >> I have a short 40 frame file (all I-frames) of 1.333 seconds duration >> that demonstrates the effect. >> >> >> https://www.dropbox.com/s/dzolh5kf2xk8zpa/overlay_iot_applications.mp4?dl=0 >> >> osgmultiplemovies -e FFMPEG overlay_iot_applications.mp4 >> >> would demonstrate the problem. Instead of playing out and looping >> smoothly, it interrupts playback at half the duration, only to resume later >> when the wrapped-around timestamp has caught up. This is bizarre. >> >> The ffmpeg version I've been testing with is the GPL'ed version >> ffmpeg-20140924-git-3bc0361-win64-shared >> >> Christian >> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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