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Is this just my problem?

H

honam1021

macrumors regular
Original poster
Nov 4, 2012
242
113
I tried to play 2 1080p videos (Ripped from iTunes and Youtube respectively) on my 2.0 DP, Quicktime freezes every few seconds, VLC isn't much better(Smooth at the beginning then start dropping frames).

http://youtu.be/72mm8nTkW2o (It may take a while before it's processed)
(For some reason the second trailer plays better than the first one but it's still choppy)

My unit's air deflector is missing(It's insanely hard to find one in my region, you can notice the fan blasting in the background), it's true that the G5 will underclock(and slow down video playback) if it's missing?
 
Last edited:
honam1021 said:
I tried to play 2 1080p videos (Ripped from iTunes and Youtube respectively) on my 2.0 DP, Quicktime freezes every few seconds, VLC isn't much better(Smooth at the beginning then start dropping frames).

http://youtu.be/72mm8nTkW2o (It may take a while before it's processed)
(For some reason the second trailer plays better than the first one but it's still choppy)

My unit's air deflector is missing(It's insanely hard to find one in my region, you can notice the fan blasting in the background), it's true that the G5 will underclock(and slow down video playback) if it's missing?
Click to expand...

It might be the video format, go with mov or avi most wacky video formats have garbage decoders
 
According to Apple your computer will run with reduced speed if you don't have the air deflector. I have never inspected it but I assume the mechanism to be quite simple, maybe magnet or something so maybe you could try fooling the machine to believe that the deflector is in place. G5 runs hot and I'm not sure how important the deflector is but it is probably wise to check temps if you manage to figure out a way to fool the machine.
 
Zotaccian said:
According to Apple your computer will run with reduced speed if you don't have the air deflector. I have never inspected it but I assume the mechanism to be quite simple, maybe magnet or something so maybe you could try fooling the machine to believe that the deflector is in place. G5 runs hot and I'm not sure how important the deflector is but it is probably wise to check temps if you manage to figure out a way to fool the machine.
Click to expand...

Just insert a paper into the third hole at the right corner, since my intake fans are also broken I am worried it'd overheat
 
honam1021 said:
I tried to play 2 1080p videos (Ripped from iTunes and Youtube respectively) on my 2.0 DP, Quicktime freezes every few seconds, VLC isn't much better(Smooth at the beginning then start dropping frames).

http://youtu.be/72mm8nTkW2o (It may take a while before it's processed)
(For some reason the second trailer plays better than the first one but it's still choppy)

My unit's air deflector is missing(It's insanely hard to find one in my region, you can notice the fan blasting in the background), it's true that the G5 will underclock(and slow down video playback) if it's missing?
Click to expand...

download xbmc 9.11 (fastest playback) or 11 (latest PPC version) that will enable 1080p playback.
 
Older versions of VLC (1.x.x) tend to work better than version 2.x.x. Not sure if it's true, but I've read that some AltiVec code is disabled in version 2. (Edit: This may no longer be true with version 2.0.8. See below).

That said, I'd work on those cooling issues before experimenting with 1080p too much. Any way that you end up playing them will push your CPUs pretty hard.
 
Last edited:
Swampus said:
Older versions of VLC (1.x.x) tend to work better than version 2.x.x. Not sure if it's true, but I've read that some AltiVec code is disabled in version 2.

That said, I'd work on those cooling issues before experimenting with 1080p too much. Any way that you end up playing them will push your CPUs pretty hard.
Click to expand...

You are correct.
 
honam1021 said:
Not every video format will play smoothly?
Click to expand...

Correct. As an example, Blu-ray discs can be in either MPEG-2 or MPEG-4/AVC format. MPEG-2 requires less overhead, but tends to be larger file size for the same quality, compared to AVC.

The G5 should be able to handle MPEG-2 with no problems at all, but may struggle on higher-bitrate AVC.

In addition, some codecs have hardware-assisted decoding in certain graphics chips; while others rely solely on the CPU at present. And the ability to use hardware assistance varies from player software to player software as well.
 
Anonymous Freak said:
Correct. As an example, Blu-ray discs can be in either MPEG-2 or MPEG-4/AVC format. MPEG-2 requires less overhead, but tends to be larger file size for the same quality, compared to AVC.

The G5 should be able to handle MPEG-2 with no problems at all, but may struggle on higher-bitrate AVC.

In addition, some codecs have hardware-assisted decoding in certain graphics chips; while others rely solely on the CPU at present. And the ability to use hardware assistance varies from player software to player software as well.
Click to expand...

Both trailers are actually MP4, but I guess the Pacific Rim trailer has a much higher bitrate than the DM2 trailer
 
Swampus said:
Older versions of VLC (1.x.x) tend to work better than version 2.x.x. Not sure if it's true, but I've read that some AltiVec code is disabled in version 2.

That said, I'd work on those cooling issues before experimenting with 1080p too much. Any way that you end up playing them will push your CPUs pretty hard.
Click to expand...

the latest 2.0.8 seemed as fast as 1.1.12
 
MrPilot said:
the latest 2.0.8 seemed as fast as 1.1.12
Click to expand...

Thanks for the heads up! After a few tests, I think you are more than correct. I think it's even faster. I guess this was just released a couple of weeks ago?

----------

Wow! Is this more efficient than Core Player? I have "skip the loop filter for h.264 decoding" set to "all", but I'm getting better CPU performance playing 1080p on my dual G4 MDD with VLC than with Core Player--About 10-15% lower CPU load with VLC and still pretty good quality even with those settings.

Wow!!!!
 
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