need more space for BD

Chum wrote on 8/1/2014, 10:58 AM
I just rendered a 2hr 9min HD to put on a BD. The file was 24.7GB. After DVDA was done prepairing it , a box popped up to say it was too big for disc. I know it said 99%, but I thought it was still enough to do - not!. Was wondering if I rendered it in MP4 that it would still work and still have good picture quality on BD. Currently I'm splitting the project (wedding video) in two, so I can keep the quality of the project in tact. I don't want to got to BD-DL -too expensive anyway.

Comments

rraud wrote on 8/1/2014, 12:02 PM
DVD Arc. has a 'fit to disc' function. You can choose which or all files are to be re-compressed. It shouldn't be much of a quality issues since the files must be huge to begin with. MP4s the other option.
bsuratt wrote on 8/1/2014, 12:09 PM
It seems you are very close.... In a 2hr video there is probably a significant amount of "dead space" that can you edit out in a way that it is unnoticed... that way you maintain the best quality.
Chum wrote on 8/1/2014, 12:58 PM
I've tried the fit to space function, but even if I vary it way low, it still doesn't vary the file size. I haven't tried recompressing just certain portions - didn't know you could do that. There are a couple spots that could be redited, but it would be a time consuming process to go back into it to reedit it and what comes afterward This was a 5 Day Render as one project.
malowz wrote on 8/1/2014, 1:49 PM
BD-R size is 23.31 GB, not 25GB (they use 1k=1000 bytes instead the 1024)
Chum wrote on 8/1/2014, 2:28 PM
Oh! Well that would explain that issue! Do you know how close to that 23.31GB level that I would be able to safely use?
malowz wrote on 8/1/2014, 6:18 PM
i did a batch file to automatically convert a .AVI file to AVC/AC3 for blu-ray.

after a few tests, i let between 100~200mb less than disc size. worked great till now. (muxing overhead can be unpredictable, so a small free space is required)
john_dennis wrote on 8/1/2014, 8:53 PM
Would you tell us what your target bit rate was in your render template when you rendered the video the first time?

I'm also curious to know if you were rendering to MPEG-2 or AVC. I know that only bit rate affects the file size, but different render templates have different success hitting the target.

I understand that you don't want to render the 5 day effort all over again, but you appear to be within 10%.

My estimate was that the bit rate was ~24 mbps. I suspect you would be hard pressed to see a difference if the target bit rate was reduced to 22 mbps.
PeterDuke wrote on 8/1/2014, 10:29 PM
Hard disks and optical disks are usually specified in GB. BDs are approximately 25 gigabytes (25 GB) capacity, meaning 25,000,000,000 bytes. 1 giga = 1000^3.

Computers usually use gibibytes, which should be abbreviated GiB but seldom is, hence the confusion. 1 gibi = 1024^3.

25 GB = 23.3 GiB approx.
Chum wrote on 8/2/2014, 9:39 AM
Yes, I normally render to MPEG2. I either had issues with AVC or it was a lot slower yet. The render bit rate was the 25mb template. Wasn't aware that you can change the template.
Stringer wrote on 8/2/2014, 1:19 PM
I don't know if it is the same for BD, but when I use DVDA for DVD it often tells me the project is too big when I have calculated it should fit. If I " prepare " the project in a folder, then use BurnAware (free) to burn the disk, it fits just fine.
john_dennis wrote on 8/2/2014, 2:30 PM
"[I] The render bit rate was the 25mb template. Wasn't aware that you can change the template.[/I]"

A small change to the bit rate in the render template on the front end can save a lot of hassle on the back end.

Strike the Customize button and change away.