Re: MJPEG Streams on MacOS, Linux, Windows
Kevan Hashemi <[email protected]>
| Newsgroups | gmane.comp.video.mplayer.user |
|---|---|
| Organization | Open Source Instruments |
| Message-ID | <[email protected]> |
Dear Reimar, Thank you for your help. > But the "-f mpeg" to FFmpeg and MJPEG codec... Are you putting MJPEG > into a MPEG container? It's the Raspberry Pi that's producing the stream, and calls is MJPEG. When I receive with ffmpeg and copy the stream codec into a file, ffmpeg says the file is "Video: mjpeg (mp4v / 0x7634706D), yuvj420p(pc, bt470bg/unknown/unknown)" Is there a container involved in the stream? I don't know. > Either is quite a horrible format. When your choice is H264 or MJPEG, these being the camera options, MJPEG does have certain advantages: every frame is a key frame, and arrives within one frame period of being captured by the image sensor. We synchronize video recordings with wireless EEG recordings to within fifty milliseconds. > I would most strongly recommend to pick some other format (e.g. mkv, > nut or such) I'm not using a container, so far as I know. I'm directing an incoming stream to MPlayer. If that incoming stream has a container, I have no control over it. > specifying -demuxer lavf and maybe even -lavdopts format=mpeg The first one works on MacOS MPlayer. The stream starts right away. The second one I believe is an mencoder option. > As far as I know, basically all MPlayer versions will fail to > properly auto-detect that and hang randomly, and what you are seeing > is probably some versions handling it better than others. I think you're right. The MPlayer versions that could figure it out took about ten seconds to do so. With "-demuxer" lavf they hook up and start streaming right away. I'm still getting this report from Linux MPlayer when I try to play the same stream: Playing ffmpeg://tcp://10.0.0.235:2222. libavformat version 53.32.100 (external) Using network protocols without global network initialization. Please use avformat_network_init(), this will become mandatory later. Cache fill: 4.00% (40960 bytes) Exiting... (End of file) Best, Kevan -- Kevan Hashemi, President Open Source Instruments Inc. www.opensourceinstruments.com _______________________________________________ MPlayer-users mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users