CCExtractor / ccextractor

CCExtractor - Official version maintained by the core team

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[PROPOSAL] Validate TTML subtitles in ISO-BMFF #1323

Open donmartin00 opened 3 years ago

donmartin00 commented 3 years ago

CCExtractor Version: 0.88

Necessary information

Is this a regression (i.e. did it work before)? {NO}
What platform did you use? {Window}
What were the used arguments? {No arguments - we did not attempt to run this type of file through the gui because we did not see an option for the ISO-BMFF.}

Additional information

Add a feature to validate TTML subtitles in ISO-BMFF format per specification 14496-30, the format used in DVB Dash and ATSC 3.0).

bubbaprog commented 3 years ago

Not sure what method they're using to do it, but I just uploaded a raw ATSC 3.0 broadcast to Twitter and the captions appeared in the tweet— so a method for extracting and converting them is already out there in something presumably avconv/ffmpeg-related, & could possibly be used to develop it here.

bubbaprog commented 8 months ago

FWIW VLC can decode captions in ATSC3.0 video, and the code can likely be ported over. https://code.videolan.org/videolan/vlc/-/tree/master/modules/codec