AppleTV 2 (black) Light Stutter but CPU:~50% FPS:24

If anyone experiences the same or has a solution please comment because its driving met nuts

Problem Description:
- I experience weird/light stuttering on ATV2. This is especially noticable when camera's move e.g. left-right/right-left, zoom-outs and flyovers.
- The stutter isnt long

So first things first:
- I enabled the debugging, and to my surprise CPU was around 50% and XBMC FPS:24 constantly.
- File(s) used are mostly *.mp4
* Video Resolution: 720 x 360, Aspect ratio: 2.8082, Format: H264, Bitrate: 1055 kbps,Frames per second: 23.976
* Initial Audio Stream, Format: MP4A, Bitrate:159 kbps, Rate: 48000 Hz, Channels:2
- Networking: Wireless, but i also experience the problem while wired.
- Protocol: SMB but experience the same over NFS.
- Read all related content on stuttering and applied those settings (if its in the wik or on the forumi i've tried it) (disbled sync/16-bit output...etc..etc)
- Installed top "apt-get install top", this shows cpu-usage for all ATV2 processes around 50%.
- Same problem occurs when i copy a part of the movie to ATV2 itself.

I have had stuttering and buffering issues, even with my computer before. I traced this back to my network setup.

I have AT&T Uverse, which uses IP for the TV signal. When any TV streams were operating, the switch in the modem would not have enough bandwidth to also deliver my .mkv stream to XBMC.

To solve this, I added an additional switch and put all non-TV traffic on it.This allowed the external switch to handle the XBMC stream while the modem switch handled the TV. This may not be your issue, but could be similar.

it-king - what you describe is the stuttering which is mostly visible during pan scenes when 23.97fps work against 60hz refreshrate. Since it is not possible to change the atv2 output to 24hz refreshrate this is something you have to live with for now...

(2012-05-01 12:45)Memphiz Wrote:  it-king - what you describe is the stuttering which is mostly visible during pan scenes when 23.97fps work against 60hz refreshrate. Since it is not possible to change the atv2 output to 24hz refreshrate this is something you have to live with for now...

I had (and sold) an ATV 3 and I noticed that in the Video settings, they had some video settings for refresh rate, along with the ubiquitous "auto". Do we know at this time whether this is hardware or is this available for ATV 2 with ios 5.1?

only 50 and 60hz. Its there for atv2 too since ios 4.4.4. There is no api for switching the refreshrate from within xbmc.

It is also there in 4.4.3, i already had the ouput set to 720p 50hz. It makes no difference.

(2012-05-01 12:45)Memphiz Wrote:  it-king - what you describe is the stuttering which is mostly visible during pan scenes when 23.97fps work against 60hz refreshrate. Since it is not possible to change the atv2 output to 24hz refreshrate this is something you have to live with for now...

This sounds interesting...

Did i miss type it?

I just hoped that you meant something with the dots " for now..."

lol ... nope ... i allways use dots ... see?