Hello Devin, Thank you for all your input. I understand the A/V sync issues is a hard task and we need to save the original video to catch where the issue happened.
You may be well served to simultaneously write out a copy of the > original TS to disk prior to transcoding. This will allow you to > debug cases where A/V sync was lost and reproduce the issue. Also, > it's much easier to be able to hand a sample to the developers and say > "Try this 100MB sample and you can see for yourself" as opposed to not > being able to provide any detail as to specifically what the source of > the A/V sync issue was. > I will do my best to save the source and transcoded output to file to see where the A/V sync started so that it can be easily reproduced. > Also, bear in mind that the issue could be on the transcoding or the > resulting decoder you are using to view the stream, and restarting the > transcoder may cause the issue to "go away" in the decoder just > because the stream is reset. When dealing with A/V sync issues I > commonly find two classes of issues: Isn't the decoder considered "reset" everytime I re-launch VLC (if I see sync issues in VLC) ? If yes then I can mostly rule out decoder issues. I have another question for anyone who can answer it. I currently today do a "ffprobe -i /tmp/hls/playlist.m3u8 -show_streams" and look at the audio and videos "start_time" and I look at the difference. I am currently considering a stream to be "out of sync" when the difference is above 1. What does difference of 1 in start_pts actually mean? Is it wrong or correct to consider A/V out of sync when there is a difference in start_pts ? -- *Ibrahim Tachijian* CEO Net Sat AB Mobile: +46723321377 bar...@netsat.se _________________________ *Net Sat ABC/O Jayway AB*Klara Östra Kyrkogata 2B, 1TR, 111 52 Stockholm, Sweden Office: +46 (0)8 408 394 53 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
