Rashkae wrote: >> 2. Should one sync the refresh rate to the video fps? (Multiple?) > > The video driver should do this for you, if it's supported. So if I play two videos in separate windows requiring different refresh rates (have not tried this yet) I wonder how could this work? I just have no idea how I would implement that properly... >> 3. What does mplayer do different when playing the same video source, on >> different refresh rate monitors? > This is called Vsync, and I believe it should be part of either the xv > or gl video output driver. When working properly vsync should refresh > the video frame at an interval timed with the monitor refresh. If I understand you correctly, the refresh can only be done exactly right if the refresh rate is a multiple of the framerate. By exactly I mean showing each movie frame for the same length of time (as intended). >> The movie is marked 29.97 fps so I figure that the original was recorded in >> 24fps and then to display it as 30fps every 4th frame is repeated (4/5 = >> 24/30). I guess that then to use the 60Hz refresh rate every frame (included >> the duplicated ones) are shown twice by the hardware. >> >> What program is doing the frame duplication? Is it mplayer figuring out my >> refresh rate and repeating the frames? >> > > If the movie is marked 29.97, then its not progressive, it is interlaced > or Telecined. Since you aren't seeing the interlace combing effects, > then you have some kind of de-interlacing filter going over the video. To clarify: during playback I did not see any messages regarding fps, which usually indicates progressive content. But mplayer -identify -frames 0 LOVE.mpg prints among others: ID_VIDEO_FORMAT=0x10000002 ID_VIDEO_BITRATE=8239888 ID_VIDEO_WIDTH=720 ID_VIDEO_HEIGHT=480 ID_VIDEO_FPS=29.970 ID_VIDEO_ASPECT=0.0000 I produced the LOVE.mpg file by issuing: mencoder -oac copy -ovc copy dvd://3 -ss 90 -endpos 10 -o LOVE.mpg so no changes to the content. I wrote the above and then I found the explanation. The problem is the behaviour of -ovc copy, I do not say it is a bug, the behaviour is probably documented... The command mencoder -oac copy -ovc copy dvd://3 -ss 90 -endpos 10 -o LOVE.mpg took the 24fps progressive content and changed it to 29.97 fps. It appears to me that every fourth frame was duplicated in order to achieve this. I could force the output frame rate: mencoder -oac copy -ovc copy dvd://3 -ss 90 -endpos 10 -o LOVE.mpg -ofps 24000/1001 This produced correct results. As for my x264 encode: it also lacked the -ofps 24000/1001 in the script. The script was generated by h264enc I will let the authors of that package know. Thanks for your response again. Matyas - Every hardware eventually breaks. Every software eventually works. _______________________________________________ MPlayer-users mailing list MPlayer-users@xxxxxxxxxxxx https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
