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Confused questions about Time and space...


Humunculus
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Hello all,

In My DVD I have created a project which included 1 background movie and 5 videos using overlays in the Menu system.

 

The background video was 48,900,096 mb in size, in MPG-2 form. It was 50 seconds long.

The line on the bottom of MyDVD states:

"8.5gb. Used:7947.9 Free: 592.1 Time remaining: 8:24" It is set to burn an ISO at HQ.

The end result was an ISO size of 8,088,551,424 mb.

 

Now I decide I want a different background video

The new background video is 153,927,680 mb in size, in MPG-2 form. It is 200 seconds long.

The line on the bottom of MyDVD states:

"8.5gb. Used:8125.1mb Free: 414.9mb Time remaining: 5:53" It is set to burn an ISO at HQ.

The end result was an ISO size of 7,654,014,976mb.

 

Can anyone suggest why replacing a background video with one four times as long,

adding 150 seconds in length, would result in a DECREASE in ISO file size of 434,536,448mb?

 

A dazed and confused Humunculus

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Hello all,

In My DVD I have created a project which included 1 background movie and 5 videos using overlays in the Menu system.

 

The background video was 48,900,096 mb in size, in MPG-2 form. It was 50 seconds long.

The line on the bottom of MyDVD states:

"8.5gb. Used:7947.9 Free: 592.1 Time remaining: 8:24" It is set to burn an ISO at HQ.

The end result was an ISO size of 8,088,551,424 mb.

 

Now I decide I want a different background video

The new background video is 153,927,680 mb in size, in MPG-2 form. It is 200 seconds long.

The line on the bottom of MyDVD states:

"8.5gb. Used:8125.1mb Free: 414.9mb Time remaining: 5:53" It is set to burn an ISO at HQ.

The end result was an ISO size of 7,654,014,976mb.

 

Can anyone suggest why replacing a background video with one four times as long,

adding 150 seconds in length, would result in a DECREASE in ISO file size of 434,536,448mb?

 

A dazed and confused Humunculus

 

Confused question or confused user? :P

 

Ignore all that crap about file size. Remember that you can get about 1 hour of best quality video on a standard disc; almost double that on a DL. You can get more but the quality suffers.

When you go to burn from Make DVD, select best quality then burn to an ISO file (if less than 2 hours) or to a folder set if a little more than 2 hours on a single sided disc. Once the project encodes, use Video Copy and Convert to copy the ISO file to the disc or the folder set to the disc. Those will both put the best possible quality on the available space.

 

As for the size, they may both be mpg2 files but the quality (bit rate may be different). Just a guess.

Edited by sknis
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Sknis, thanks for replying.

 

"When you go to burn from Make DVD, select best quality then burn to an ISO file " This I do.

 

Just downloaded Gspot and checked the files, yes there is a difference but it is just more confusing.

 

First Movie (the short one)

Container

MPEG-2 Program Stream << { 1 vid, 1 aud }

Sys Bitrate: 10080 kb/s VBR

Codec : MPEG-1 Layer 2

0xc0:48000Hz 192 kb/s tot , Stereo

 

Second Movie (the long one)

DVD "VOB" format

MPEG-2 Program Stream << { 1 vid, 1 aud }

Sys Bitrate: 10080 kb/s VBR

Codec:AC3

0xbd[0x80]:48000Hz 384 kb/s tot , 6 chnls (3/2 .1)

 

Typically a higher bit rate requires more disc space.

I'm concerned that during ISO creation MY DVD is is sacrificing quality somewhere else by compressing to make room to fit information that is too long.

Maybe this is something I can avoid by changing the format?

What is the best proceedure to change the second video to an equivalent audio stream (mpeg1 layer 2 48000Hz 192 kb/s tot , Stereo)

so I can create a comparison?

 

Since only the background video has that audio quality, it will not be missed in comparison to the rest of the disc.

 

Humnculus

 

 

 

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Sknis, thanks for replying.

 

"When you go to burn from Make DVD, select best quality then burn to an ISO file " This I do.

 

 

Since only the background video has that audio quality, it will not be missed in comparison to the rest of the disc.

 

Humnculus

 

Please enlighten me :rolleyes: Why would you want a 2.5 minute menu? If the background movie is that important then make it part of the main movie. Nobody is going to sit there and watch a "menu" for 2.5 minutes that is mostly obscured by objects on the menu screen. :unsure: If you watch a commercial DVD you will find that almost all menus are no longer then 30 secs.

Edited by myguggi
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Myguggi, that is a fair question.

 

Sometimes people put a disc in, but are not ready to immediately start watching the movie.

They get situated, gather their food and drink, wait for the late family member, etc.

Putting in a long background movie is actually a service, because it means that people waiting

for other things to happen before they start the movie, do not have to be subject to short,

endlessly and annoying repeating loops.

I do not expect someone to watch the whole background movie, but for as long as they will

delay making their choices at least they will have something interesting to watch and/or listen to.

Since it is a music video, I want to make the background movie the entire length of the song.

 

Update: I have used video capture and convert to regenerate the opening movie.

This brought the file down from 153,927,680 mb to 82.489,344 mb.

I thought this would not work, since there seems to be no separate control for audio, but the

mix automatically brought the audio down to the 48000Hz 192 kb/s tot , Stereo

 

After generating a new .iso using the smaller file, I still get an ISO of the same size, 434 mb

smaller than with an opening movie 1/4th the size. It still doesn't add up. :huh:

 

According to Nero Burning Rom, a blank DL disc holds 8148mb

or about 7.95703125 gigabytes

 

Now my original file with the short intro (50 seconds) was 8,088,551,424 bytes.

Divide that by 1024 and we get :7,898,976 megabytes.

The new introduction added 33,589,248 bytes (assuming a direct conversion)

So

8,088,551,424

+ 33,589,248

=8,122,140,672

Which translates to a total of 7,931,778 mb. Well below what the disc holds.

 

If there is some additional overhead that puts it over the limit, I can understand

that the software would compress it in some way. but that's all I can think of.

 

H.

Edited by Humunculus
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Adding 150 seconds to the background video decreased the file size from 8,088,551,424 to 7,654,014,976

Adding 100 seconds to the background video increased the file size to 8,207,892,480

Definitely some unwanted and unexplained compression going on.

I just wish the program would have warned me before making me go thru the process.

 

Humunculus

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Ha Ha! No I don't think so. I don't record in blu ray or HD.

If anything I will update to the 2010 version of this program.

 

Will project files created in MY DVD in media creator 10 be able to be read by the newest version of this product?

 

Updating will not make any difference to your perceived problems :rolleyes:

 

Project files created in easy media creator 10 are not compatible with newer versions of this product. That has always been so with Roxio even with older versions.

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Updating will not make any difference to your perceived problems :rolleyes:

Reality is irrelevant. It's perception that counts.

Control people's perceptions, and you control their reality.

 

Project files created in easy media creator 10 are not compatible with newer versions of this product. That has always been so with Roxio even with older versions.

Thank You for saving me a bunch of money. You are the Roxio Gekko. :)

 

malatekid: Good catch.

 

H.

 

 

 

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