Le duodi 12 brumaire, an CCXXV, Clement Boesch a écrit : > --- > So this is just a prototype that is starting to work. It needs a split > (and completion of the long TODO list) before review but I wanted to > share it for early feedbacks. > > So long story short: AVSubtitle → AVFrame, you have to use the new M:N > API, and it's integrated into lavfi.
Yay! > Now a bit longer: the AVFrame->extended_data are > AVFrameSubtitleRectangle (declared in lavu/frame). Frames are > refcounted. So far this is not really meaningful as a frame ref will > alloc and copy every rectangle but that's a limitation we will have to > deal with for now but it allows proper integration into the framework. Can you briefly explain how you handled the duration and sparseness? Also, I see you kept the text field a simple string with ASS syntax. Is it final? > It actually simplifies a lot the workflow so I'm optimistic about the > end result. Unfortunately, there is a lot of work remaining. > > End note: despite my obsession with subtitles, I'd like to remind > everyone that I actually hate working with them, I just believe it's > really important to get that historical burden out of sight. That means, > if anyone wants to help with that, they are extremelly welcome. > > Thanks, > > TODO: > - what to do about sub2video? The plan was always to remove it as soon as a proper solution in libavfilter was implemented and does the same job. Preferably with a short transitional period for the users, but not if it is too inconvenient. > - properly deal with -ss and -t (need strim filter?) > - sub_start_display/sub_end_display needs to be honored > - find a test case for dvbsub as it's likely broken (ffmpeg.c hack is > removed and should be replaced by a EAGAIN logic in lavc/utils.c) > - make it pass FATE: > * fix cc/subcc > * broke various other stuff > - split commit > - Changelog/APIchanges > - proper API doxy > - update lavfi/subtitles? Regards, -- Nicolas George
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