This is to partially fulfil my qualification task for the "Implement full support for 3GPP Timed Text (movtext, QuickTime?) subtitle" as part of this year's GSoC. This does not meet all the requirements of the task, but I will submit additional patches before the end of the application period to implement encoding of rich text from text sample modifier boxes as well as decoding/encoding to/from the default style record in sample descriptions.
Bold, italic, and underline styles from mid-stream sample modifiers are converted to ASS subtitles. I verified this behaviour using a 3GP video with embedded subtitles displaying text in various styles (this can be provided if needed to verify my code). A text sample can have multiple text style sample modifiers associated with it (zero or more), but each modifier's starting offset will never be before the ending offset of preceding records, if they exist. This makes it easy to read modifiers sequentially and avoid needing a stack to store the records before generating styles, which is done in microdvddec. Please review this patch and let me know if it looks good or can be improved. Thank you, Wesley Castro Wesley Castro (1): 3GPP TS 26.245 Timed Text decoder: decode rich formatting in sample modifier boxes libavcodec/movtextdec.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 69 insertions(+), 3 deletions(-) -- 1.9.1 _______________________________________________ ffmpeg-devel mailing list firstname.lastname@example.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel