DVD compression issues!

UncleBenji1977

UncleBenji1977

Well-known member
Alrighty... So someone give me the what's what on this. I have a standard DVD burner; not double layer or anything like that. I have been working on some Miss Alabama prelim videos and I can't fit more than 40 minutes of high quality video onto one disc. I would love to know if it's possible to compress it so it will all fit onto one DVD and will it kill the quality to do this? Is there a specific format? Will my DVD authoring software do this for me? I use Sony's DVD Architect for anyone interested. Thanks for any comments!



All my love and gerbils,
Uncle Benji
 
You should be able to get 90 minutes or more of "high quality" footage on a DVD (6 to 7.5Mbps). What are doing for audio (AC3, PCM, Mpeg)? PCM would eat up valuable space. And how much material are you trying to squeeze onto a disc?

Here's a formula to compute max bitrate (not including audio stream):

36,096/(length of program x 60 sec)

Ex: 36,096 / (120 min. program x 60 sec. = 7200 sec.) = 5.01 Mbps
 
So you think my audio needs to back down? I guess I'm just new at this end. Can edit like a madman, just this compression crap throws me off a bit. Now about the audio again... Don't think it's PCM. How can I check this?
 
I don't know anything about DVD Architect so I don't know what your output options are. The documentation should tell you or some clues provided by the software at the output stage. If Dolby AC3 is an option, use that. Mpeg 1 Layer II audio is often employed by some authoring apps but technically it's not part of the standard so there is the potential (small) for issues on playback. Layer II audio would be the next best option for space conservation.
 
I'm having the same issue with Adobe Premiere Pro. Here are my settings. Am I missing something?

General:
File type - Microsoft DV AVI
Range - Entire Sequence
Export Video - Checked
Export Audio - Checked
Embedding options - None

Video:
Compressor - DV (NTSC)
Color Depth - Millions of colors
Frame Size - 720/480 (unable to change)
Frame Rate - 29.97 fps
Pixel Aspect Ratio - D1/DV NTSC Widescreen 16:9 (1.2)
Recompress - Checked (Maintain Data Rate)

Keyframe and Rendering:
Fields - lower field first
Deinterlace Video Footage - Unchecked
Optimize Stills - Checked
* No keyframe options checked

Audio:
Compressor - Uncompressed
Sample Rate - 32000 Hz
Sample Type 16-bit
Channels - Stereo
Interleave - 1 Frame
 
Yeah, that's essentially what I have to work with Venman... That's pretty much what winds up being captured, and it maintains perfect quality. At least when playing back through the NLE... Still not sure about this DVD stuff. I know the easiest route would probably be to just break down and buy a dual layer burner. But I still would like a temporary fix until I get to that point. Just don't have the cash for that right now.
 
UncleBenji,
After rendering the project to a DV.avi file, bring that into your Vegas timeline and render it to an MPEG2 using the "DVDA complient " video stream. I use 7,500 high;6.00 average and 5.00 low settings which seem to play well on almost any DVD player without choking. Then, render the same file as a Dolby AC3 file.
Bring those files into DVDA and go from there. I can easily fit a 90 minute program with menus on a DVD using those settings.
A 2 hour show required an average of 5.0 to fit on the disk.
You don't need a double layer for this. However, to assure playability on the largest number of machines, you should burn on good media at a 2x speed, rather than 8x or higher.
Hope this helps.
Ken
the Screen Skins guy
 
Venman said:
Audio:
Compressor - Uncompressed
Sample Rate - 32000 Hz
Sample Type 16-bit
Channels - Stereo
Interleave - 1 Frame
Click to expand...

PCM is uncompressed audio and takes more disk space. AC3 (Dolby) is compressed audio and what is used for DVD.

I use DVD Studio Pro which is part of the Final Cut Studio, so I can't tell you how to set it up to get AC3 on your application.
 
kplo said:
UncleBenji,
After rendering the project to a DV.avi file, bring that into your Vegas timeline and render it to an MPEG2 using the "DVDA complient " video stream. I use 7,500 high;6.00 average and 5.00 low settings which seem to play well on almost any DVD player without choking. Then, render the same file as a Dolby AC3 file.
Bring those files into DVDA and go from there. I can easily fit a 90 minute program with menus on a DVD using those settings.
A 2 hour show required an average of 5.0 to fit on the disk.
You don't need a double layer for this. However, to assure playability on the largest number of machines, you should burn on good media at a 2x speed, rather than 8x or higher.
Hope this helps.
Ken
the Screen Skins guy
Click to expand...



KPLO,
So you mean one needs to render first as an .AVI file, then re-render the same file with as an MPEG2 (All done in one NL3, e.g Vegas). After that, one will now render only the same whole file as a Dolby AC3 file (is this the rendered MPEG2 file that will be rendered as a Dolby AC3 file or the rendered .AVI files?)?

I have a 2hrs 10mins file and I want it to fit into one DVD. I intend on using a double layer DVD but after rendering it out using Mpeg2, it looks over compressed, please explain to me how to get this fixed?
 
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