1 Reply Latest reply: May 2, 2013 7:05 AM by Stan Jones RSS

    Which file size to believe? 3 different choices from Media Encoder, Encore & ISO?

    EdwurdAdam Community Member

      Hi,

       

      I encoded a project from Premiere which is an Hour and 50 Minutes. I exported my timeline into Media Encoder and I got the estimated file size to 19GB. (This is a Blu-Ray Disc).

       

      I encoded it and then I looked at my Hard drive where I saved it to and it said that file size is 16.5 GB, a lot smaller than the estimated 19 GB.

       

      I imported into my Encore CS 5.1 project, where I had menus and music over my menus, as a timeline, and went to the Build Menu in Encore to look at the file size now. It said 20.5 GB.

       

      Lastly, I made as ISO file of the project and that came out to 22.5 GB

       

      Which file size do I believe?

       

      From now on, I think the most I can encode any timeline from premiere into Media Encoder is 20 or 21 GB. Tops. Knowing that it is going to be a liittle larger once I bring it it Encore.

       

      The ISO file always seems to be the biggest and maybe this is the one to trust.

       

      Any thoughts or solutions on this problem?

       

      I know Encore has a file size bug, but how do other people deal with this problem.

       

      Thanks in advance.

        • 1. Re: Which file size to believe? 3 different choices from Media Encoder, Encore & ISO?
          Stan Jones CommunityMVP

          I don't know about how AME reports its estimates, and I have not tested iso size, but here is the info I did the last time I tried to understand Encore and disk sizes. It was done for DVD, but I believe the same issues are present for Bluray + the issue of whether Encore was "padding" its predictions.

           

          FYI, my belief is that an iso that fills a disk when the image is burned, is too large to copy to that disk. So you can't assume the size of the iso file is the same as the final DVD/Bluray content.

           

          Basically, Encore says it is tracking GB in the BUILD panel, but it is really tracking bytes. A DVD that is called "4.7 Gigabytes" is really only 4.38GB - it is 4,706,074,624 bytes. To get to Gigabytes, you divide by 1,073,741,824 (1.024 * 1024 * 1024). Which is about 4.38.


          What this means is that if you read your file size as 3.9GB, it is actually 4,187,593,113 bytes. To make this confusing within Encore, Encore reports your file in the project panel as 3.9GB. But when it lists the amount of the disk used and free in the build panel, it is reporting bytes with "GB" after it.


          I just did a no menu test with a 1.69GB m2v and 41.5MB ac3. Encore reports 526KB of ROM used (the size of empty rom), used as 1.91GB, and 2.79GB free on a 4.7GB disk. (Remember that these are all bytes.) Built to a folder, Encore reports that it is writing 1.89 GB (really bytes), and the actual output folder size is 1,891,278,848.


          My recollection now is that it may have been only bluray that was the subject of comments about Encore padding its predictions of size on disk. What we are seeing here (for DVD) is no padding.