Thanks, Ivanov. I'll stick to my current solution now. Same as you, will further consider the way ffmpeg workaround it in the future.
Get Outlook for Android<https://aka.ms/ghei36> ________________________________ From: Libav-user <[email protected]> on behalf of Hristo Ivanov <[email protected]> Sent: Wednesday, October 24, 2018 10:08:57 PM To: This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter. Subject: Re: [Libav-user] Inconsistent dts/pts in packets read by av_read_frame from rtsp stream. Is it expected behavior? Hi Yang, > While I'm using av_read_frame to extract frames from some rtsp stream from IP > cameras, the dts/pts of the next frame occasionally will be smaller than the > previous frames. Currently I am facing the same problem. > Is it a bug of libav or a P frame or maybe there's a bug in the IP cameras' > rtsp implementation? I doubt this being a bug with libav, but I can not tell if it is a bug in the IP cameras or something inherited from the rtsp protocol itself. > then I should discard the consequent frames with smaller dts when I mux it to > avoid non increasing dts, should I? Currently my solution to this problem does exactly this, but ffmpeg(the tool) uses other solution, which is to modify the pts/dts values. [ https://github.com/FFmpeg/FFmpeg/blob/master/fftools/ffmpeg.c#L782 ] My current solution works fine, but I will try the one ffmpeg uses. I hope this helps.
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