> Do you have an example stream recording? > And who are those who wouldn't be following? Broadcasters?
For what it's worth, I have seen this and it can definitely happen. It's not common though since it both technically violates the spec and also not best practice (for example, some televisions won't show you the option to enable captions if the caption stream isn't present at all). Generally it occurs when the broadcaster is doing splicing of TS streams entirely in the compressed domain (e.g. for ad insertion), or cases where ads or programs don't contain captions and the encoder/transcoder isn't smart enough to generate empty caption packets and include them in the output. That said, I think it's very defensible to say, "We don't set the flag saying captions are present if not detected within the probing window". Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com _______________________________________________ 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".
