Same project, different size files

AVIGuy

Newbie Joined: Aug 16, 2012 07:42 Messages: 10 Offline

Solved by

Jan 12, 2013 21:27

Hi, I just upgraded from PDR 10 ultra to PDR 11 Ultimate, I loaded a project that I have already rendered in PDR 10 to see if the speed was really faster. When it was done I noticed that the same project, same profile and stats for production exactly, are different file sizes. The file from PDR 11 was 25% larger than the one from PDR 10.

The Project consists of an .avi 720HD (1280 X 720) 10kbps in stereo with a couple edits, 1 picture at the begining and ending with 1 or 2 fades and it's being converted to 720HD .mpg2 at 13kbps and dolby 5.1

Both profiles used custom settings of:
1280x720 at 13Kkbps, dolby 5.1 at 384kbps sample rate of 48 kHz. The project is 22:05 minutes long.

There were no changes made whatsoever in the project.
the PDR 10 size is 1.00 GB (1,074,835,456 butes)
the PDR 11 size is 1.26 GB (1,355,155,456 bytes)

Over 25% larger for the same project! can anyone tell me why this is please?
Even in PDR 10 I could produce similar length MPG2 files with the same profile and get significantly different sizes, I figured it was the differences in cuts and splices and any extras, pips, fades, subtitles, etc.

Any help is greatly appreciated as I am new to the editing game.
Thanks in advance

P.S. I can't tell a significant speed increase in PDR 11 over PDR 10, I was hoping that running the 2 video cards would help out. Any clues on how to optimize speed would be helpful as well. PDR 11 Ultimate
Current setup: Intel I7 2500K 3.4ghz, 12 gigs ram, 4TB internal HDD, 2X AMD 6950 video cards total of 4 gigs ram running in crossfire mode, Windows 7 64bit

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Jan 13, 2013 00:16

Hi AVIGuy -

There's probably something a little different in the profiles you've selected... I'd check the video bitrate of the produced files using MediaInfo.

I just dropped in some 1920x1080 MPEG-4 (14MBps) clips - total duration 22 minutes - into PD10 & produced to MPEG-4 1920x1080 @ 13MBps.

It took 15mins 30secs to render & the output file size is 2.06GB

Next - I opened the same project with PD11 & rendered to exactly the same format & profile.

It took 12mins 17secs to render & the output file size is 2.06GB

So - same file size in both & PD11 rendered a little quicker.

Cheers - Tony
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James Dotson

Senior Contributor Location: Tennessee Joined: Aug 24, 2009 20:40 Messages: 3066 Offline

Jan 13, 2013 01:02

One of the improvements for PD11 was better MPEG 2. As Tony said, it could mean a higher bit rate and larger file sizes. __________________________________
CORNBLOSSOM

AVIGuy

Newbie Joined: Aug 16, 2012 07:42 Messages: 10 Offline

Jan 14, 2013 14:03

Thank you both for the fast replies, I downloaded Media Info and installed it.

It says that the one from PDR 10 is 5,971kbps and the PDR11 one is 7,628 so the one is a good bit higher. What I don't understand is that PDR11 and PDR 10 are both set at 13kbps and neither of these are even close to that. When you look at the properties in windows in the file itself it says that it's 13K as well, am I missing something here?

I appreciate any help, I'm new at the editing game so there is a lot I don't understand yet.
Thanks in advance PDR 11 Ultimate
Current setup: Intel I7 2500K 3.4ghz, 12 gigs ram, 4TB internal HDD, 2X AMD 6950 video cards total of 4 gigs ram running in crossfire mode, Windows 7 64bit

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Jan 14, 2013 15:12

Don't worry about the discrepancy between how Windows, PD & MediaInfo analyse the bitrate. That's quite normal. Of the three, MediaInfo is the most reliable... though you're right - 7MBps isn't anywhere near 13MBps!

The only way to make a valid comparison between PD10 & 11 is to use exactly the same source material & produce to exactly the same format & profile. The default profiles in PD10 & 11 aren't necessarily exactly the same.

Anyway - the bitrate difference could easily account for the file size difference in your case. It may even have had some impact on rendering time, since the original AVIs were 10MBps.

Cheers - Tony

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AVIGuy

Newbie Joined: Aug 16, 2012 07:42 Messages: 10 Offline

Jan 14, 2013 19:55

Thank you Tony,

Yes I agree on the size difference now that I see that the PDR11 is much higher on the bitrate, I just don't know why 13K in 11 only comes out to be 7K in media info, and I used the same custom profile for both of the renders from the same source file as well. I set the customs because all the defaults set quality at 6 and I want to best so I set them to 7 even when I use a profile that has no other changes from default.

Still for the most part the video seems just fine, I have captured video on the PC before with Aimersoft Ultimate Converter before as well and it captures .wmv files at 6kbs, still in PDR 10 the videos end results are acceptable to me. I seem to have problems with Aimersoft sometimes having audio pitch problems and/or audio sync problems tho. It seems to happen a lot these days so I have all but stopped using it now. I guess I should contact thier tech support hehe

Thank you again sir PDR 11 Ultimate
Current setup: Intel I7 2500K 3.4ghz, 12 gigs ram, 4TB internal HDD, 2X AMD 6950 video cards total of 4 gigs ram running in crossfire mode, Windows 7 64bit