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View Full Version : Blockiness (and a bit jittery)




SnapperUK
Aug 14, 2012, 02:24 PM
Hi,
So last night I watched the first episode of a 1080 box set I ripped using Aisee-soft Blu-ray Ripper for Mac. 95% of it was fine, but every now and again I would get a bit of blockiness. I quickly tried to replicate it on my MBP by playing the same file but couldn't see it.
Is it likely to be the rip or could it be caused by the file size (4.16GB for 60 minutes) and glitch in streaming?
The other thing is that the whole rip felt ever so slightly uncomfortable to watch. I can't quite put my finger on it. Could the frame rate be out?
Does anyone else use Aisee-soft? If so what settings are you using?



mic j
Aug 14, 2012, 02:36 PM
Hi,
So last night I watched the first episode of a 1080 box set I ripped using Aisee-soft Blu-ray Ripper for Mac. 95% of it was fine, but every now and again I would get a bit of blockiness. I quickly tried to replicate it on my MBP by playing the same file but couldn't see it.
Is it likely to be the rip or could it be caused by the file size (4.16GB for 60 minutes) and glitch in streaming?
The other thing is that the whole rip felt ever so slightly uncomfortable to watch. I can't quite put my finger on it. Could the frame rate be out?
Does anyone else use Aisee-soft? If so what settings are you using?
If you watch the movie again, will the blockiness occur at the same point in the movie? File size is not a problem, possibly wifi capacity/speed or maybe bitrate. I am not familiar with the application you used. Does it compress the movie or just change the container?

waw74
Aug 14, 2012, 06:26 PM
take a look at makemkv (http://www.makemkv.com/) and handbrake (http://handbrake.fr/).

The 2 of them will let you do the same thing, makemkv will rip the disc, and then handbrake converts it to aTV (or other) formats.

the "strangeness" you're seeing is probably frame rate related, most movies are 24 Frames/sec (fps) , while the aTV outputs 60fps. since you wind up with extra frames each second, the aTV makes them up as a combination of 2 frames. This is most noticeable in side to side movement, it makes vertical lines look jagged or makes the movement seem to stutter.
check out 3:2 Pulldown (http://en.wikipedia.org/wiki/Three-two_pull_down) and telecine (http://en.wikipedia.org/wiki/Telecine) at wikipedia.

Cobra611
Aug 14, 2012, 07:47 PM
Do you happen to be watching on a Samsung tv? I have the same issues, which kinda upset me thinking I would have perfect streaming capabilities of HD content. But, the issue is a LOT less noticeable on my 5 year old Sharp Aquos, than it is on my Samsung with I believe a 120htz rate.

MacinJosh
Aug 15, 2012, 03:48 AM
the "strangeness" you're seeing is probably frame rate related, most movies are 24 Frames/sec (fps) , while the aTV outputs 60fps. since you wind up with extra frames each second, the aTV makes them up as a combination of 2 frames. This is most noticeable in side to side movement, it makes vertical lines look jagged or makes the movement seem to stutter.
check out 3:2 Pulldown (http://en.wikipedia.org/wiki/Three-two_pull_down) and telecine (http://en.wikipedia.org/wiki/Telecine) at wikipedia.

Yeah. Only way around that on an ATV is to conform movie to 25FPS, lower audio pitch which has raised as a result of speeding the movie slightly. Then output at 50Hz and make sure TV supports 50Hz (most do).

But this is way too much work to be worth the effort. You need Pro software to do it anyway. This is how studios release PAL DVDs.