Am Di., 5. Mai 2020 um 17:41 Uhr schrieb PPRJ01 <[email protected]>: > I don't understand why neither ffmpeg nor ffprobe detect presence of closed > captions within MP4/H.264 in some video streams when VLC does. > > Let me explain this... In the past 20 years, I have been working in several > countries over the world and I bought official DVDs. Not duplicates ;-) I > ripped them first to VOB and recently converted them to MP4/H.264 with ffmpeg > without using the "-a53cc" option. > > Reminder : when running ffmpeg and ffprobe, a few lines are written first to > stderr. The words "Closed Captions", when present, indicate that the video > stream contains closed captions. > > ==> The point is that ffmpeg/ffprobe do not show closed captions existence > for MP4/H.264 files that come from ZONE 1 DVDs but VLC does and displays them. > > ==> Conversely, for zone 2 DVD, ffmpeg/ffprobe work properly. > > ==> Do you know why this happens ??? > > I am currently using a Windows 10 version of ffmpeg/ffprobe. Please see the > details below with a DVD, bought in zone 1, that contains closed captions.
> ________________________________________ > > ffprobe version 4.1 Copyright (c) 2007-2018 the FFmpeg developers Please test current FFmpeg git head before reporting issues on this mailing list. For future questions: Please understand that your subject is maximally misleading, please try to improve... Finally: Please confirm that this happens for files where the first closed captions appear later in the stream and retry with (very) large values for -analyzeduration and -probesize. Carl Eugen _______________________________________________ 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".
