Le quartidi 14 frimaire, an CCXXIII, Anshul a écrit : > It would be valid, c708 is backward compatible as far as > I have seen while working with ccextractor. > C708 is made in such a way that people dont have to throw there older TV > sets or device. > if any decoder is not able to decode c708 part, even then they can get > correct subtitle.
So if I understand you correctly, the format could have kept the same name, just as when Matroska adds a new codec name, and the name is only relevant as an indication of what a decoder is capable of handling. > Yes while doing that only I realized, if we use "i" then cc must be in > first stream. > When I had multiple stream(with audio), then I was not able to map subcc > to my video stream. > using stream_idx , we are saying that if we can use out0+subcc and > out1+subcc. > "i" logic fails when there is audio in 1st stream, there was no way i > could get the subtitle > if my first stream is not the one where closed caption are present. I will look more closely into it. In the meantime, you may want to have a look at this one: http://samples.ffmpeg.org/MPEG2/subcc/ClosedCaptions/subccItalic.mpg I see quite a few subcc packets, but the decoder does not output anything. Furthermore, I do not see any ASS styling in the decoder, that would be a good test case. More comments to come. Regards, -- Nicolas George
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