20 gb in makemkv and 23 gb in dvdfab. 3 gb?

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srahulbose
Posts: 1
Joined: Wed Jan 30, 2013 1:36 am

20 gb in makemkv and 23 gb in dvdfab. 3 gb?

Post by srahulbose » Wed Jan 30, 2013 1:44 am

Can you please help me understand the file size difference?

I purchased Lion King and used makemkv and dvdfab to compare the files. Both produce excellent images.

But I am confused because of the difference in file sizes of the title video :
1. Original file in BR : 25 GB
2. DVDFab : 23 gb - default (mkv.remux)
3. MakeMKV : 20 gb

I understand there is zero compress to audio and video. Then, why is the makeMKV file not 25 gb? Or am I overlooking something?

Thanks.
Rahul

fryk.
Posts: 35
Joined: Tue Oct 09, 2012 7:57 am

Re: 20 gb in makemkv and 23 gb in dvdfab. 3 gb?

Post by fryk. » Wed Jan 30, 2013 6:43 am

Try to remux one of your MKVs with MKVToolnix (or an other MKV muxer) and you get a third file size. This is normal. MKV is not ZIP or RAR. See http://matroska.org/technical/specs/index.html

Smithcraft
Posts: 654
Joined: Mon May 02, 2011 8:56 pm
Location: Seattle, WA

Re: 20 gb in makemkv and 23 gb in dvdfab. 3 gb?

Post by Smithcraft » Wed Jan 30, 2013 7:33 am

By default, MakeMKV does not copy audio streams that are in the same language. So if you have a main audio stream that is English, MakeMKV will not copy the other English streams, like any commentary streams. That is the only thing I can think of.

SC

Romansh
Posts: 872
Joined: Sat Jan 22, 2011 7:09 pm

Re: 20 gb in makemkv and 23 gb in dvdfab. 3 gb?

Post by Romansh » Wed Jan 30, 2013 11:33 am

Smithcraft wrote:By default, MakeMKV does not copy audio streams that are in the same language. So if you have a main audio stream that is English, MakeMKV will not copy the other English streams, like any commentary streams. That is the only thing I can think of.

SC
Also, IIRC the default track selection profile only keeps the core audio, not the lossless substream.

HolgiB
Posts: 20
Joined: Sun Nov 25, 2012 8:47 pm

Re: 20 gb in makemkv and 23 gb in dvdfab. 3 gb?

Post by HolgiB » Tue Feb 05, 2013 10:07 am

Rahul,

simply using a different version of a MKV muxer may produce significant file size differences.
You can simply demux both MKV files to raw streams by using MVKExtract and compare both the number of stream and their corresponding sizes.

HTH,
Holger

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