Hello！ I am a beginner. When I was reading your source code, I didn't quite understand the meaning of is_relative() and RELATIVE_TS_BASE. I would like to ask for your help. Thank you very much! -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://ffmpeg.org/pipermail/libav-user/attachments/20200730/85d64347/attachment.html>