Originally Posted by Murilo
Also tiasur did your old set have any issues with xbmc? Xbmc does need to be setup right to play smoothly, I cant have use full screen window on for instance, and i also need to set my audio to wasapi hdmi, i just want to make sure its not xbmc settings giving you a jerky picture.
I have fixed this a while ago and did not mention as was thinking XBMC off topic here. However here is my shortcut for those who needs explanations or experience same problem I did.
The real reason of the choppy video I had was a wrong frame rate not a resolution. It just happened I have HD movies mostly in 24 fps and SD in 25 fps which firstly made me mistaken in detection of the root cause of a problem.
I use XBMC based on Ubuntu and here is it what I did to fix the problem. The TV must be connected to your HTPC.
1. Run “xrandr” from terminal and make sure there is all modes required to support your video. I had the following output:
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 1539mm x 866mm
1920x1080 60.0*+ 30.0 30.0 24.0
1024x768 75.1 70.1 60.0
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 60.0 59.9
You can see no 25 fps mode detected and so, it had to be added.
2. I needed to get mode values for 50fps which is normal for 25fps movies playback. I used gtf (it works more accurate than cvt) :
and here is its output (do not use them as values in your case supposed to be different):
# 1920x1080 @ 50.00 Hz (GTF) hsync: 55.62 kHz; pclk: 141.50 MHz
Modeline "1920x1080_50.00" 141.50 1920 2032 2232 2544 1080 1083 1088 1114 -hsync +vsync
3. Now I had to add this 50fps mode every time XBMC boot up. I used .xprofile file for that.
xrandr --newmode 1920x1080_50.00 141.50 1920 2032 2232 2544 1080 1083 1088 1114 -hsync +vsync
xrandr --addmode HDMI1 1920x1080_50.00
Save and exit:
Make it executable:
That is it. My XBMC automatically adjust frame rate according to source file. BTW, I do not have audio sync problem.
In regards of my second complain about motion issue I think it can be either my eyes or I am too picky. I am still investigating this. I have all motion enhancement off on my TV. There is no problem with the soap opera effect as you can turn it OFF.