'Jerky' playback on apple tv2

hatcheeks

macrumors member
Original poster
Jun 7, 2010
46
0
Sheffield
i have recently converted some mkv 720p files using handbrakes appletv2 setting and when i watch them on my tv the playback is a little bit 'jerky' i.e.not very smooth. if i watch the mkv file on my iMac I'm sure they play much smoother. anyone got any ideas? would apple tv3 play them better ?
 

Macbooky

macrumors newbie
Feb 18, 2008
24
7
How have you got your Apple TV connected to your network? Is it through wifi or ethernet? If its wifi, I'd try connecting an ethernet cable and see if it improves playback.
 

Dan DRC

macrumors member
Nov 15, 2011
45
0
Experiment with the refresh rate on the TV this could help a lot depends on the TV. Do a forum search there are several threads about this. From what I understand this is not a a handbreak problem. I adjusted my TV and I would say about 95 percent of the issue went away.
 

Macbooky

macrumors newbie
Feb 18, 2008
24
7
I would also suggest using Video Monkey to encode one of the videos and see if you still get the same problem. Its a free program and using the Apple TV2 setting on it, gives excellent results for 720p video. I prefer that to Handbrake.
 

waw74

macrumors 68040
May 27, 2008
3,269
247
it's due to the fact that a lot of media is encoded at 24 frames/sec (fps) while the aTV outputs 30 or 60 fps (can't remember which, but it doesn't do 24), it has to do with adding the frames to fill in the missing ones.


for more info...
http://en.wikipedia.org/wiki/Telecine#Frame_rate_differences


it's why you'll see 240 fps (or hertz) advertised on newer TVs, since 240 is evenly divisible by 24, 30 and 60 it doesn't have to make up or skip frames so them all play back smoothly.
 

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