I can't reproduce this here.
When I load a cfr 23.976 fps video and use "Filtering->Speed Change->Change speed" to speed it up to 25fps I end up with 25fps cfr video.
Hybrid should only output vfr if the source is already vfr. -> Are you sure your video is 23.976 cfr and not 29.976fps telecined content?
Without any details about your source and no debug output of what you are doing: No clue
Also if your audio was synced against the initial 23.976fps video (and not stretched or anything), speeding up the video would cause an async output, since the playback speed of the video stream (and thus it's playback length) would be changed, but the audio stream length would still be the same
Seems to me that you described only half of what you are doing.
a. speeding up audio&video playback speed (and thus shorten the playback length)
b. adding additional frames to the video stream (by duplication or interpolation) and not touching the audio.
c. when using mkv one could change the playback speed of the audio and video without re-encoding (changing the frame rate info of the video and adjusting the audio stretch factor of the audio)
Cu Selur
When I load a cfr 23.976 fps video and use "Filtering->Speed Change->Change speed" to speed it up to 25fps I end up with 25fps cfr video.
Hybrid should only output vfr if the source is already vfr. -> Are you sure your video is 23.976 cfr and not 29.976fps telecined content?
Without any details about your source and no debug output of what you are doing: No clue
Also if your audio was synced against the initial 23.976fps video (and not stretched or anything), speeding up the video would cause an async output, since the playback speed of the video stream (and thus it's playback length) would be changed, but the audio stream length would still be the same
Seems to me that you described only half of what you are doing.
Quote:I need to convert a video with CFR from 23.976 fps to 25 fpsIn general this can be archived by:
a. speeding up audio&video playback speed (and thus shorten the playback length)
b. adding additional frames to the video stream (by duplication or interpolation) and not touching the audio.
c. when using mkv one could change the playback speed of the audio and video without re-encoding (changing the frame rate info of the video and adjusting the audio stretch factor of the audio)
Cu Selur
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.