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Does lowbit rate = low quality?
I’m currently making a HUGE project in Sony DVD Architect 5.2. So big I’ll probably need a double sided disk to burn it. However, I got an error saying my total menu size is greater than 1 gb. Not knowing what to do, I messed around with the bitrate until it would allow me to continue preparing it. It turns out the maximum bitrate allowable is 5.192. The default was 8. What will this do to my video? Is there any way to get around the 1GB error without decreasing the bitrate? Thanks.
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7 Replies
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That must be one HUGE menu for you to go over the 1 GB limit.
You’ve found a way around it though so you’re OK.
As far as image quality, low bitrate does = low quality.
I’ll temper that by saying that it depends on how good your source video is.
I once shot a stage play that ran 150 min. (2.5 hr.) and I put it on a single layer DVD.
The show was professionally lit with very few dark scenes and was shot with very good cameras (3 1/2″ CCDs).
The final average bitrate was only 3,800 but due to the source material being as good as it was, it looked just fine. -
When you say 3,800, do you mean 3.80? The scene selection menu takes up all of the space, with each menu having 10 links on it. The background media runs about two-four minutes. It’s just a slow moving background. The film itself is 2.5 hrs long, 6 GB, and is made up of film and photos. The render quality was 720 x 480 MPEG-II, audio included. The quality was HDV 30p if I remember correctly. I used this render setting for all background medias as well.
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I just looked and the exact VBR numbers I used were 6,496,000 / 3,712,000 / 2,224,000 with AC-3 audio at the default stereo setting.
I rendered it using the 2-pass mode.
This does take longer but the results are worth it.
The scene selection menu was very basic (Play All, Scene 1, Scene 2). -
Haha umm I’m sort of a Sony amateur, what does all that mean?
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VBR is Variable Bit Rate and CBR is Constant Bit Rate.
When you encode (i.er. render) an MPEG file from Vegas, you can use the default settings but a lot of us prefer to use Custom settings to make maximum use of the capabilities of Vegas.
A good tutorial for this process is Vol. 1 Issue 7 (a free newsletter in PDF format) from Edward Troxel.
While written for older versions of Vegas and DVDA, everything is still applicable.
https://www.jetdv.com/vegas/forum/viewtopic.php?t=15 -
Thanks so much:) Unfortunately, I think I’ve hit a roadbump. I finished the DVD, with the final bitrate being 2.964 (low I know). The final DVD size is 8.3 GB. Here are a few more of my settings:
– Output type: DDP 1.20
– DVD Type: DVD-9 (8.5 GB)
– Number of layers: 2
– Resolution: 720 x 480
– Format: MPEG-II
– Audio: AC-3 Stereo
– Audio Bitrate: 192When I first prepared my DVD, I got an error message stating the VOB files were too large for the type of DVD I was trying to create. I checked my settings and found that it was trying to prepare a DVD-5 (4.7 GB) DVD from an 8.3 GB project. That’s when I set it to DVD-9, as you can see above. However, I just tried preparing the project again and got the SAME error! This is deeply aggrivating. Why is it saying that it cant make a 8.5 GB DVD from an 8.3 GB project???
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Odds are that DVDA is getting confused.
Start a brand new project with a different name, set the project properties for the proper size of disc first, save the project (remember, a new name) and only then start to add your assets.According to the bitrate calculator I use, that rate is way too low.
Try a 2-pass VBR using 8,000,000 / 6,768,000 / 4,056,000 for Max, Avg and Min.
You’ll also need to determine a break point (the spot at which the movie switches layers).
I’ve never done a dual-layer disc but I believe that this time is set in DVDA.
If you can, make sure that your video has a place at around the 1/2 way point that can be used for this purpose.
A fade out/fade from one scene to another makes a great break point.
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