DV Info Net

DV Info Net (https://www.dvinfo.net/forum/)
-   Adobe Creative Suite (https://www.dvinfo.net/forum/adobe-creative-suite/)
-   -   Maximum quality for DVDs - what duration? (https://www.dvinfo.net/forum/adobe-creative-suite/138987-maximum-quality-dvds-what-duration.html)

Deniz Ahmet December 4th, 2008 06:17 PM

Maximum quality for DVDs - what duration?
 
What is the maximum bit rate for a DVD ,compiled in Encore/Premiere. PAL.

Is 90min pushing it?

Tripp Woelfel December 4th, 2008 08:27 PM

If you're looking for looking for the max legal bit rate from a DVD, you might want to check the spec. It's in there. The Adobe Media Encoder will probably not let you build a DVD with illegal specs.

If you want to know whether 90 minutes of video will look good on a DVD. The answer is probably yes. Using a good transcoder you can put up to about 120 minutes of video on a DVD with very good quality. 90 shouldn't be a problem.

Devin Termini December 4th, 2008 09:58 PM

The total data throughput for DVD is 9 mbps. Keep in mind that this is your audio and video data combined.

I've made numerous 120 min single layer DVDs no problem.

If you can get dual layer media the images will look better, but I wouldn't worry about 90 min.

Jeff Pulera December 5th, 2008 10:06 AM

As mentioned, 2 hours or so is not uncommon, most of my weddings and stage events are around 2 hours or a little more, have NEVER had a customer complain about quality.

About the 9 mbps figure - that is video and audio combined, on replicated DVDs. In the real world using DVD-R media, a high bitrate like that can cause playback issues with many players, so I recommend a maximum of 7 on the quality. Using AC-3 Dolby audio also reduces overhead and allows more room for higher quality video than PCM audio, which would use over 1GB of space for a 2 hour movie!

A good formula for figuring the video encoding rate is 560/minutes, so for 90 minutes you'd use 6.0 video encoding (with Dolby audio), for 120 minutes, 4.5 setting. I like CBR versus VBR, for consistent quality and playability.

Jeff Pulera
Safe Harbor Computers


Quote:

Originally Posted by Devin Termini (Post 973183)
The total data throughput for DVD is 9 mbps. Keep in mind that this is your audio and video data combined.

I've made numerous 120 min single layer DVDs no problem.

If you can get dual layer media the images will look better, but I wouldn't worry about 90 min.


Ervin Farkas December 5th, 2008 11:45 AM

As defined by the DVD standard, the maximum bitrate is 9.8Mbps for video and audio combined. I have used it with burned discs with no problems (might create issues on very old players only). At maximum allowable bitrate and no navigation, and considering MPEG audio at 384Kbps, 60 minutes of video will fit on the single side disk, video bitrate being 9416Kbps. For 90 minutes of video, the bitrate will drop to 6394Kbps.

If you use DVD navigation, leave a minimum of 2% disk capacity for that. More advanced MPEG2/DVD encoders (Adobe included) have the option of setting the bitrate automatically to the highest possible in order to fit your entire video. Always use VBR two pass (or multiple pass as allowed by the software - CinemaCraft for example allows up to 99 passes).

Also, higher quality encoders will produce a better picture at the same bitrate. Most Hollywood DVDs are encoded at 4-5Mbps, some even lower, but using very sophisticated, mostly hardware encoders, and segments are re-encoded lots of time for best results.


All times are GMT -6. The time now is 09:36 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network