Go Back   MacRumors Forums > Apple Hardware > Apple TV and Home Theater

Reply
 
Thread Tools Search this Thread Display Modes
Old Sep 8, 2013, 04:52 AM   #1
LevMac
macrumors 6502
 
Join Date: Feb 2008
Location: QLD, Australia
Question Handbrake issue?

Sorry guys, wasn't sure whether to post this in another Handbrake thread or not.

The issue im having is, im converting MKV files through Handbrake using the Apple TV 3 preset, and lets say the MKV is about 8GB or 9GB, my Handbrake conversion comes out at 4.5GB ? Even if the MKV is about 5GB, the Handbrake conversion comes out at almost 4GB?

From memory, my Handbrake conversions from an 8GB MKV used to come out at around 6GB or so? Has anything changed in the latest update to Handbrake?

I guess what im trying to get at is that Handbrake might be lowering the quality on my MKV's ? I do know it compresses these files but didn't know it lowered the file size that much
LevMac is offline   0 Reply With Quote
Old Sep 8, 2013, 05:00 AM   #2
priitv8
macrumors 65832
 
Join Date: Jan 2011
Location: Estonia
I'm not sure what's your reference to compare with, but recent HB-s default to constant quality (as opposed to constant bitrate) setting, which effectively creates a VBR compression. You can test with various CQ slider settings to see the effects.
IMHO, HB (in essence the free x264 coder) does the best job on achieving picture quality from least bitrate.
priitv8 is offline   0 Reply With Quote
Old Sep 8, 2013, 05:29 AM   #3
LevMac
Thread Starter
macrumors 6502
 
Join Date: Feb 2008
Location: QLD, Australia
Quote:
Originally Posted by priitv8 View Post
I'm not sure what's your reference to compare with, but recent HB-s default to constant quality (as opposed to constant bitrate) setting, which effectively creates a VBR compression. You can test with various CQ slider settings to see the effects.
IMHO, HB (in essence the free x264 coder) does the best job on achieving picture quality from least bitrate.
Thanks for the reply

So would I need to adjust the Constant Quality setting to the left or right ?

Also, does changing the H.264 Level higher than 4.0 make things better?

Sorry I have no idea lol

Last edited by LevMac; Sep 8, 2013 at 05:46 AM.
LevMac is offline   0 Reply With Quote
Old Sep 8, 2013, 11:33 AM   #4
priitv8
macrumors 65832
 
Join Date: Jan 2011
Location: Estonia
Quote:
Originally Posted by LevMac View Post
So would I need to adjust the Constant Quality setting to the left or right ?

Also, does changing the H.264 Level higher than 4.0 make things better?
Yes, but pay attention that the scale is logarithmic! And larger figure gives you less quality. I've left mine at default 20 for 720p encodings and reduced to 22.5 for 1080p encodings.
The H.264 level has no direct impact on bitrate, but depending on your playback device, there might be a limit. E.g. Apple TV 3 can't play back any profile above High 4.0!
A primer to H.264 levels and profiles
priitv8 is offline   0 Reply With Quote
Old Sep 8, 2013, 01:08 PM   #5
mic j
macrumors 68020
 
Join Date: Mar 2012
I would also like to add that the transcoded file size is heavily dependent on the source. For instance, films with a lot of grain get compressed a lot less than films with minimal/no grain. Similar thing goes on with dark scenes, amount of action, etc. So file size may/may not be an indication of transcode quality depending on source material. I tend to ignore file size, trusting in HB to give me the best possible quality regardless of the source.
__________________
17" MBP '09, 2.66 GHz, 8GB RAM; 13" MBP (Retina) '12, 2.5GHz, 8GB RAM; iPad 2, 32GB; iPhone 5s; AE; AppleTV 3; AEBS w 1TB Seagate HDD; 65" Mits DLP, Sony STR-DB1070 AVR
mic j is online now   0 Reply With Quote
Old Sep 10, 2013, 03:51 AM   #6
LevMac
Thread Starter
macrumors 6502
 
Join Date: Feb 2008
Location: QLD, Australia
Thanks for the replies guys

I have decided to set my CQ setting at 16 and the quality is fantastic
LevMac is offline   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
Handbrake Cropping issue - Blu Ray safe? iOrbit Apple TV and Home Theater 1 Aug 28, 2013 03:00 PM
Handbrake Audio Output Issue kumquat Digital Audio 4 Aug 21, 2013 05:30 PM
Handbrake - Audio Source Issue kumquat Mac Applications and Mac App Store 2 Aug 17, 2013 03:57 AM
Handbrake issue with images mancuk29 Mac Basics and Help 1 Jul 11, 2013 05:26 AM
Handbrake issue Lil Chillbil Mac Pro 3 Jun 21, 2013 05:50 PM

Forum Jump

All times are GMT -5. The time now is 01:40 PM.

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

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