Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > Apple Hardware > Apple TV and Home Theater

Reply
 
Thread Tools Search this Thread Display Modes
Old Dec 22, 2012, 08:46 AM   #1
DaGrandMastah
macrumors 6502a
 
Join Date: Mar 2011
Subler? Change profile for Apple TV and how to optimize?

2 Questions. I'm converting some mkv files to m4v to play on my apple tv 3 but i'm not sure on the following:

1. Should I automatically change the profile to main @ 3.1 since it's playing on an apple tv 3? It loaded up as high @ 4.1

2. How do I optimize the file? Do I first convert the file to m4v and then optimize? What exactly does that do?
DaGrandMastah is offline   0 Reply With Quote
Old Dec 22, 2012, 05:33 PM   #2
Pyromonkey83
macrumors 6502
 
Join Date: May 2009
Quote:
Originally Posted by DaGrandMastah View Post
2 Questions. I'm converting some mkv files to m4v to play on my apple tv 3 but i'm not sure on the following:

1. Should I automatically change the profile to main @ 3.1 since it's playing on an apple tv 3? It loaded up as high @ 4.1

2. How do I optimize the file? Do I first convert the file to m4v and then optimize? What exactly does that do?
1. Main @ 3.1 has a resolution limit of 720p. The Apple TV 3 supports up to High or Main @ 4.0 levels, but I do in fact believe you will be fine by leaving it at High @ 4.1. iTunes will end up dropping or compressing certain video and audio packets for streaming to support the ATV better but it should still work fine. At the very most I would say just change to High @ 4.0.

2. After you add the mkv to Subler and select all of your settings, add it to your queue. In the queue window at the bottom there is a small arrow that opens a mini menu. In here you will find a checkbox to "optimize" before you start your queue. This does some fancy stuff (I have no idea what it does technologically speaking) that causes your videos to be optimized for web streaming. If you make 2 files, one optimized and one not, you will find that the optimized version starts playback much quicker and does not have a long load time at the beginning of the movie or when changing chapters.
Pyromonkey83 is offline   0 Reply With Quote
Old Dec 22, 2012, 11:45 PM   #3
DaGrandMastah
Thread Starter
macrumors 6502a
 
Join Date: Mar 2011
Quote:
Originally Posted by Pyromonkey83 View Post
1. Main @ 3.1 has a resolution limit of 720p. The Apple TV 3 supports up to High or Main @ 4.0 levels, but I do in fact believe you will be fine by leaving it at High @ 4.1. iTunes will end up dropping or compressing certain video and audio packets for streaming to support the ATV better but it should still work fine. At the very most I would say just change to High @ 4.0.

2. After you add the mkv to Subler and select all of your settings, add it to your queue. In the queue window at the bottom there is a small arrow that opens a mini menu. In here you will find a checkbox to "optimize" before you start your queue. This does some fancy stuff (I have no idea what it does technologically speaking) that causes your videos to be optimized for web streaming. If you make 2 files, one optimized and one not, you will find that the optimized version starts playback much quicker and does not have a long load time at the beginning of the movie or when changing chapters.
Thanks for answering. That basically clears it up. No point in me messing with the files then. I'll just leave hte profile as is and make sure everything is optimized.
DaGrandMastah is offline   0 Reply With Quote
Old Dec 23, 2012, 08:42 AM   #4
mic j
macrumors 68000
 
Join Date: Mar 2012
Quote:
Originally Posted by Pyromonkey83 View Post
This does some fancy stuff (I have no idea what it does technologically speaking) that causes your videos to be optimized for web streaming.
Just for the sake of understanding, the optimization is the moving of a small packet of information, called the moov atom, from the end of the file to the beginning of file. The moov atom contains playback information. When it's at the end, your player will not know how to play the file until it reads the atom. Moving it to the beginning, allows the player to have that information before the file is entirely loaded, thus speeding up the process. Of course, there is a reason the moov atom is normally placed at the end. If you modify the information (metadata), you only need to re-write moov atom. If it is placed at the beginning, you have to re-write the whole file (everything is shifted) which is a little slower. So far, though, I have found the re-write time of an optimized file to be very tolerable. Schools over.
__________________
17" MBP '09, 2.66 GHz, 8GB RAM; 13" MBP (Retina) '12, 2.5GHz, 8GB RAM; iPad 2, 32GB; AE; TV 3; AEBS w 1TB Seagate HDD; 65" Mits DLP, Sony STR-DB1070 AVR
mic j is online now   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Apple TV and Home Theater

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Subler won't Optimize some files MoodyM Apple TV and Home Theater 3 Aug 31, 2013 05:06 AM
Apple TV subtitle size ! subler AjeeB Apple TV and Home Theater 13 Nov 23, 2012 05:50 PM
Subler and no sound on Apple TV? DaGrandMastah Apple TV and Home Theater 12 Nov 5, 2012 10:00 PM
Changing h.264 profile w/ Subler (getting 1080p on ipad 1) kbutler84 Apple TV and Home Theater 2 Jul 10, 2012 09:04 PM

Forum Jump

All times are GMT -5. The time now is 02:31 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC