* Carl Eugen Hoyos on Saturday, April 15, 2017 at 00:44:43 +0200 > 2017-04-14 23:44 GMT+02:00 Mark Burton <[email protected]>: >> I find it hard having to accept an encode will always play out of >> sync on certain players. > > Could you elaborate a little? > So far, for every ticket, it either turned out that out-of-sync was > not reproducible with MPlayer / vlc (and FFmpeg) or it was off- > by-one-frame which I consider hard to reproduce...
In theory it is probably correct that it's the task of the decoding application to make the aac priming work. In many real world scenarios this does not happen. I do a lot of segmenting, and can always reproduce it with the hls muxer: https://trac.ffmpeg.org/ticket/3859 I closed it because, as per last comment I finally resorted to the workaround(?) mentioned here. https://trac.ffmpeg.org/ticket/3859#comment:13 https://sourceforge.net/p/opencore-amr/mailman/message/32912437/ If you see a HLS playlist where the TARGETDURATION is higher than the duration of any segments than the first you can bet it has been created by ffmpeg. And if you don't clip at the end, you can easily get invalid audio-only segments as last segment, and end of video may not be detected in the majority of real world scenarios, arguably when you play HLS in a browser. So, apart from introducing minimal async, it also has other repercussions. Why not a warning, ideally with a hint as to how to best deal with the situation, similar to the one about pix_fmpt yuv420p: Use -pix_fmt yuv420p for compatibility with outdated media players. Maybe there is no correct solution, and the delay hint in the verbose output was certainly helpful, at least in my case; it also points to some awareness of a potential problem area. It just took me a long time to find it. -- Was heißt hier Dogma, ich bin Underdogma! [ What the hell do you mean dogma, I am underdogma. ] free movies --->>> https://blacktrash.org/underdogma http://itunes.apple.com/podcast/underdogma-movies/id363423596 _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
