> Express duration in seconds > Repeat the last image as per > https://trac.ffmpeg.org/wiki/Slideshow#Concatdemuxer
Thanks for this hint. This really works and -vsync vfr seems to be necessary for mp4. (For mkv it works without that.) It works as well if you provide the durations in milliseconds, but there seems to be a problem with short durations, which are not reproduced exactly. So one should rather use durations larger than one second, as in the cited example. I now successfully produced a vfr mp4 with ffmpeg. Indeed, some applications as VLC do not handle the timestamps correctly, but AVidemux and ffplay do. Plus the vfr is preserved when the slide show is processed with ffmpeg (using -vsync vfr). Possibly, the relatively short durations in my original video are the reason for the problems with the original video, as there seem to be rounding errors. Wolfgang Hugemann _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
