On Mon, Dec 9, 2024 at 1:24 PM Vladimir Kharchevin <vkharche...@gmail.com> wrote: > > When importing text subtitles from libzvbi_teletext stream the duration of > subtitle > frames is -1 by default or fixed value per codec setting. > For hls webvtt stream it makes disappear time always 1193:02:47.295 for every > subtitle. > Suggested to add hls option fix_teletext_durations to fix this behavior and > set subtitle > duration to the next subtitle packet time. > > Signed-off-by: Vladimir Kharchevin <vkharche...@gmail.com>
I would point you towards `fix_sub_duration` together with the related heartbeat option for this for CLI usage. Also as a note, there are already multiple formats that support "show until next" functionality: - US captions - ARIB captions from Japan and South America - DVB Teletext So this is not specific to one specific format or decoder. Finally, the way to support actual pass-through of show-until-next values with webvtt would be to check if the specification supports handling show-until-next subtitles. This could then be then implemented in the WebVTT encoder and muxer. Not in the HLS muxer. Best regards, Jan _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
