> -----Original Message----- > From: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx> > Sent: Montag, 28. September 2020 22:06 > If you have some (public) bitstream that are known to timeout, and that you could > share with me, that would be nice, so I could have a more complete set of samples. Thanks for the response! We only have MPEG4 and H.264 encoded videos in use and the described problem occurs only with MPEG4. I analyzed the video streams with ffprobe [1] and found out that the problem occurs when the video contains a couple of small P frames between key frames. For my test bitstreams, I basically did the same as your colleague Nicolas, but additionally I did some variations with ffmpeg [1]. To get really small P frames, only little changes between frames are allowed. Therefore, a "single color video" seems to be the best choice. Since the problem seemed to be related to the size of a frame, I varied: width, height, bitrate and GoP (amount of P frames between key frames). This should also be possible with your gstreamer pipeline [2, 3]. These things also lead to my "simplistic approach" to solve the issue. I saw your patch series and will try it as soon as possible. Regards Benjamin [1] https://ffmpeg.org/ [2] https://gstreamer.freedesktop.org/documentation/libav/avenc_mpeg2video.html?gi-language=c#avenc_mpeg2video:gop-size [3] https://gstreamer.freedesktop.org/documentation/libav/avenc_mpeg2video.html?gi-language=c#avenc_mpeg2video:maxrate *Get "packet sizes" of video stream:* ffprobe -hide_banner -select_streams v -show_entries packet=flags,size -of compact video.avi
