Max Bit rates from Compressor to DVDSP

L

Lkorver

Well-known member
Hey guys,

new to compressor and DVDSP, do you know the max bit rate I can set in compressor and then again in DVDSP? I had them maxed out in compressor and it wouldnt burn in dvdsp, the program said bit rate was too high. I'm burning a 45min movie, but that shouldn't be a factor.
 
Bit rates for DVDs are limited by DVD players, as some can't handle higher bit rates. For a 45 minute movie you can have a high bit rate, but one should ALWAYS be a little conservative with mpeg2 bit rates for DVDs, as you want to ensure playback on as many devices as possible.

When you set rates in DVDSP, it's for media that it's going to automatically encode (if you just brought in a QT mov for example)

In compressor, try sticking to an average of 5 and a max of 6.5 and you should be golden. If you want cleaner looking compression, try checking out a program like Sorenson Squeeze .
 
cool, thanks for the help, i'll take a look at sorenson, messed around with in the past, i'll revisit it.
 
arges03 said:
Bit rates for DVDs are limited by DVD players, as some can't handle higher bit rates. For a 45 minute movie you can have a high bit rate, but one should ALWAYS be a little conservative with mpeg2 bit rates for DVDs, as you want to ensure playback on as many devices as possible.

When you set rates in DVDSP, it's for media that it's going to automatically encode (if you just brought in a QT mov for example)

In compressor, try sticking to an average of 5 and a max of 6.5 and you should be golden. If you want cleaner looking compression, try checking out a program like Sorenson Squeeze .
Click to expand...
Not entirely true... Yes it can be limited by the DVD player, but it should NOT be any more limited than the DVD spec itself. To quote wiki:

DVD-Video discs have a raw bitrate of 11.08 Mbit/s, with a 1.0 Mbit/s overhead, leaving a payload bitrate of 10.08 Mbit/s. Of this, up to 3.36 megabits can be used for subtitles and a maximum of 9.80 megabits can be split amongst audio and video. In the case of multiple angles the data is stored interleaved, and so there's a bitrate penalty leading to a max bitrate of 8 Mbit/s per angle to compensate for additional seek time. This limit is not cumulative, so each additional angle can still have up to 8 Mbit/s of bitrate available.
Click to expand...

So a more "lax" player could feasibly allow higher bitrates, as they have the horsepower (both in drive speed, memory, and processing), but even some theoretically capable players are just so to-spec, that they don't play out-of-spec discs anyway.

Interestingly, a 2.21:1 anamorphic option is supported in the *MPEG2* spec, but not officially in the DVD Video spec, so some players will actually support it, while others will not. I've tried this for a gain in resolution for 2.35/40:1 movies (letterboxing them within a 2.21:1 space and resizing to 720x480). The video was off a pre-existing DVD, so I obviously didn't gain any actual resolution, but the concept is nice.
 
My default is 6.9 2 pass with Max being set at 8.2. You can push it higher but not all DVD player are created equal. I have done some really short videos at 7.7.
 
You must log in or register to reply here.
Back
Top