nobody really does anything.
I’ve been working on some pro video player in an attempt at improving 24Hz playback performance. It turns out that the cause of the uneven framerate issue was the 24Hz modeline I was using. The TV and ??computer were not well synchronized, or something. The supposed “standard” modeline is:
ModeLine “1920x1080@23.976” 74.175 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync
Through painful experimentation, I tweaked the dot clock, the delay between drawing lines, and the delay between drawing frames. The resulting modeline,
Modeline “1920x1080@23.976” 74.19 1920 2558 2602 2751 1080 1084 1089 1124 +hsync +vsync
appears to work well, but I need to test this further. This reference on modelines was immensely helpful.
Update: I had to change an XFlush() call to XSync() in mplayer’s xv output driver, but now double buffering + direct rendering appear to work correctly. Approx. 0 glitches noticed so far…
