> Did you try another application that uses sdl? Yes, I tried VLC, I also got problems. I think about using Gstreamer, but I am looking for how to use it to do decoding.
You are right. I agree with all your comments. But, I still don't know what the source of these issues is. Thank you On Sun, Jun 17, 2018 at 11:17 PM Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > 2018-06-17 22:40 GMT+02:00, Mohammed Bey Ahmed Khernache < > mohbeyi...@gmail.com>: > >> ffplay does not work > >> with video via ssh which I don't consider very worrying. > > > > This time, I am connecting the board directly to the screen > > via Micro-HDMI, and I got the same issue. That's why, I > > am sure that problem didn't come from ssh connection. > > Did you try another application that uses sdl? > > >> Anything wrong with using ffmpeg > > > > FFmpeg works fine, without any problem. But, it can not do anything to > > reach the requested framerate (fps). For example, if a video is encoded > at > > 25 fps, FFmpag can decode it at 5 fps if we use for example only one > core, > > or at 60 fps if we use 8 cores. Therefore, FFmpeg decodes at the capacity > > of the hardware. I consider this as a constraint, because I can not > > calculate miss rate which is an important metric to evaluate a video > > decoder. > > I may misunderstand but please believe me that ffplay is nearly > unsuitable for performance tests, many people use ffmpeg -i > input -f null - to measure libavcodec (and libavformat) performance. > You can specify what number of threads libavcodec should use for > decoding, both when using ffplay and ffmpeg. > > In your example, libavcodec is not (nearly) fast enough to decode > the given video in real-time using one cpu core, from what you write > it is possible using multiple cores. While decoding (h264) often > scales badly, using more than one core is not unusual, especially > to reach a given performance. > > Please remember not to top-post here, it is considered rude. > > Carl Eugen > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".