ATV2 with subtitles enabled causes lag

Ned Scott Wrote:Subs work fine for me on my iPhone 4 with iOS 5.0.1 and XBMC v11 beta 3. The only difference between it and the iPad 1 is RAM.

what kind of subs ? srt work fine here too (atv2 4.1 eden beta3 and iPhone 4 4.1 eden beta3), its sub/idx subs that are problematic.

biGdada Wrote:what kind of subs ? srt work fine here too (atv2 4.1 eden beta3 and iPhone 4 4.1 eden beta3), its sub/idx subs that are problematic.

different issue

Th3avatar Wrote:Also, when I was monitoring the resources with top, it seems that XBMC was only running with 1 thread. If XBMC were running with 2 threads I think everything would be faster.

Top only show all threads combined. XBMC has always been multi-threaded.

Ned Scott Wrote:different issue

what's the difference ?

Hmm then any idea why the XBMC cpu level are higher than the overall cpu level?
For now the way I play is play it scaled at 50%.
Is there any way to fix this or did we just lose to apple?

EDIT: Seems like top also shows the combines CPU, so CPU0 + CPU1 etc. But then it only shows about 110% at max while the iPad 2 should be able to handle up to 200% minus Springboard.

Th3avatar Wrote:EDIT: Seems like top also shows the combines CPU, so CPU0 + CPU1 etc. But then it only shows about 110% at max while the iPad 2 should be able to handle up to 200% minus Springboard.

standard behavior from top under multiple cpus.

biGdada Wrote:what's the difference ?

The issue in this thread is specifically SSA/ASS subs, specifically on 4.4.x

4.4.4 on atv an 5.0.1 on iPad/iPad2 Not sure if this is the case for iphone.

I'm probably not adding anything new to the discussion, but I've seen this problem for a long time and assumed that what was happening was that when you watched an MP4 movie without subtitles, all the work got offloaded to the GPU, but when subtitles were involved, it now required that the subtitles be overlayed on top of the video, which then meant pushing everything through the CPU. But if other subtitle formats can be overlayed without causing any slowdown, that's actually a positive bit of news. I wonder if XBMC could do some sort of on-the-fly conversion to a simpler subtitle format, non-antialised font, or something along those lines.

Scott R Wrote:I'm probably not adding anything new to the discussion, but I've seen this problem for a long time and assumed that what was happening was that when you watched an MP4 movie without subtitles, all the work got offloaded to the GPU, but when subtitles were involved, it now required that the subtitles be overlayed on top of the video, which then meant pushing everything through the CPU. But if other subtitle formats can be overlayed without causing any slowdown, that's actually a positive bit of news. I wonder if XBMC could do some sort of on-the-fly conversion to a simpler subtitle format, non-antialised font, or something along those lines.

Then the whole point of having styled subs would be quite useless. I think it can be fixed, but people don't know where to start.