DVD burning - Max. video data rate for mpeg-1?

vbimport

#1

Hi,
This must be an easy question for someone…
…I’m writing an mpeg-1 file to a DVD (PAL) and would like to know if there is a maximum video data rate, and if so what it is.

Thanks,
Simon.


#2

According to videohelp.com (former dvdrhelp.com/vcdhelp.com)
“Up to 9.8 Mbit/sec MPEG2 or up to 1.856 MBit/sec MPEG1 video”
//Danne


#3

Thanks for the reply. :slight_smile:


#4

Just remember, the quoted bitrates above are for the combined Video+Audio bitrates.


#5

on top of what CM said, those are also peak values, so the bitrates aren’t allowed to go above those values at anytime while staying dvd-compliant.


#6

Thanks. Am I right in saying that if I choose a ‘Constant’ video data rate then it can’t peak over these values?
(Just out of interest do you know what would happen if it did peak over?)


#7

The sound will probably begin to stutter and the picture may freeze randomly. You’ll achieve best quality using VBR (Variable Bit Rate).
//Danne


#8

Ok…the quality may be better using VBR, but isn’t there then a risk of peaking over the max. values? How can I be sure not to? Could I say use a bit rate of the max. values minus a certain percentage? Is there a known formula?


#9

any good encoder will allow you to define a maximum bitrate that won’t be exceeded while using VBR in addition to the average bitrate.


#10

I’m actually using Ulead Video Studio 7 SE VCD, to edit and save as .mpeg.
There doesn’t appear to be a max setting.
Could you recommend some other software (preferably free :wink: ) that I could feed say .avi into (from the Ulead software) and save as .mpeg with these peak settings?
Thanks.


#11

TMPGEnc (free for mpeg1 I think), CCE (definitely not free), I think QuEnc too if you frameserve via avisynth.

/MLS


#12

In addition to the above, TMPGEnc ver 12a does MPEG2 (and MPEG1) and is 100% free (though difficult to find).


#13

Just to let you know how I got on…

…I did find TMPGEnc ver 12a. However the image kept freezing during mpeg-2 encoding…I guess this is a bug (?), as I downloaded the latest trial version (mpeg-2 encoding free for a month) and it worked ok.

As I’m starting out with analogue the difference between mpeg-1 and mpeg-2 is not that great (however it is noticable). I suppose I have to decide whether the difference in quality is worth buying an avi->mpeg-2 encoder for…

A big thank you to all who contributed to this thread. You’re doing a great job.