Me again... sorry. Image compilation size.

Streetdog wrote on 6/28/2004, 1:45 PM
When i add files to an image compilation the size of DVD goes off the roof!!!
I've added 20 .tif files, 720x576 and set the duration of each one to 2 minutes. It add ups about 1Gb to the DVD size!!!!
Is this normal? In Adobe Encore the same image sequence won't take more than 10Mb on the DVD...

Thanks, and sorry for the all the questions...

Comments

SonySDB wrote on 6/29/2004, 5:42 AM
DVDA renders a picture compilation as a video. You'll find that when you actually prepare the picture compilation that it is significanlty smaller than 1 GB; the MPEG encoder only uses as many bits as necessary and because of the simplicity of a picture compilation (i.e. no motion), it won't come close to using the full bitrate.
bStro wrote on 6/29/2004, 8:36 AM
What SonySDB said.

Also, if you want to get a better idea of what the final size of the compilation will actually be, you can:

Go to File -> Optimize DVD
Select the picture compilation on the left.
Under Recompress Settings on the right, change Use Default Bitrate to "No"
Lower the value for Bitrate.

Since they're just still images, there will be no movement, so you don't need a high bit rate. I'm not sure what DVDA would use if you didn't change this (I'd've assumed 8Mb, but apparently that's not the case -- maybe it's smart enough to change this for picture compilations) or what's the lowest you can use.

As long as you stay with DVD specs, I don't think lowering the bit rate should harm the quality. (I'm referring only to picture compilations here, not videos with motion.)

Rob
Streetdog wrote on 6/29/2004, 9:34 AM
Great! I've used the lowest bit rate available (0.192) and it went down to 97Mb. I still think it's a lot of space for an image sequence but it's much better than 1Gb!!!
bStro wrote on 6/29/2004, 9:36 AM
If that 97MB is just the estimate, the final peprared/burned size may actually be lower. DVDA tends to overestimate.

Rob
zemanel752 wrote on 7/12/2004, 7:34 PM
Hi,

I have about 10 MPG2 video/audio files that I had added to DVD Architect with the Insert Media Function, all worked fine.

But then I realised that I could do the same with Music compilation, so I used a Music Compilation where I now have the same videos... The thing is that the initial dvd size was ~4gb, and now it's up to 50 GB!!!!!!!!!!!!!

I can't even create the dvd, because I don't have that hard disk space free!!!!
what can I do? this is surely a bug of somesort!
zemanel752 wrote on 7/13/2004, 4:25 AM
Found what the problem was, but still, it's very strange, it's not a reasonable size...

I had files in DVD PAL 720x576 25fps, and my project was set to DVD 704x576 25 fps..

johnmeyer wrote on 7/13/2004, 10:03 AM
DVDA estimates are completely useless. Go ahead and render to your hard disk and then look at the size of all the files in the VIDEO_TS directory. Until Sony fixes their estimates, this is the only way to find out how much space it will take.

For something like still photos, I would create a sample project, one with just one picture, and the other with a few dozen pictures. Use the DVDA Prepare function and create a separate folder for each. The size of the first folder is the baseline for a single picutre. The difference between this folder and the one with a few dozen pictures will give you the incremental storage required for each picture. Divide this difference by the number of pictures in your second project, and you then have the space required for each new picture.

Also, I think that I read in another post that DVDA requires vastly different storage depending on whether you create the still pictures as part of a picture compilation, and menu based compilation, or a music compilation. I think (and my memory could be wrong on this) that someone said the smallest size was achieved by using a music compilation. It had something to do with DVDA only using a single "I" frame.