Speed of VOB creation

svermeul

New member
What sort of speed are other users getting when creating the contents of the VIDEO_TS directory (i.e. VOB files). I've tried this with some MPG2 files created by my Hauppauge PVR-150 card using their WinTV2K 4.7.23033 application. These were created with the SP DVD recording setting and VideoRedo TVSuite shows all the output options as being "compliant" with the exception of the Maximum GOP which has a yellow circle beside it (minor recode required).

When I do a test burn (just creating the VIDEO_TS folder) it takes about 25 seconds to encode 1 minute of source video on a dual 1.8GHz athlon box.

A test burn of the same source on a 2.8GHz Pentium Core Duo takes about 11 seconds per minute of video.

At this rate a 2 hour movie would take between 21 minutes and 50 minutes (depending on the machine) to prepare the VIDEO_TS files before the actual burning to DVD starts.

Note during this time the machines are not showing as very busy, the task monitor shows them in the 20-25% CPU utilization range, so I suspect that VideoRedoTV is not doing much processing of the content (plus to do the same thing in another DVD authoring tool was taking about 1-1.5 minutes for each minute of video source and was pegging one CPU at 100%).

So is this sort of time typical?

Or would a more "compilant" input source improve things?
 
VRD has mostly disk I/O based limitations, unless you are recoding.
Carefull selection of drive and directory locations will help.
Using multiple physical hard drives is a significant benefit.

I do find that VRD takes about twice as long authoring as gui4ffmpeg but gui4ffmpeg is starting with already edited files, while VRD is editing "on the go".

You need to consider that you're not just authoring but doing additional processes. I can author and create iso for about 4Gb of files in approximately 20 - 25 minutes. I set up directories to alternate physical drives on each step of the process. I'm running a dual 2.4Ghz AthlonXP and two 80 Gb drives.
 

svermeul

New member
VRD has mostly disk I/O based limitations, unless you are recoding.
Carefull selection of drive and directory locations will help.
Using multiple physical hard drives is a significant benefit.
On both of my machines a direct copy of the video source file is 3-4 times as fast as VRD doing its VOB creation. So VRD must be doing something beyond just disk IO...

You need to consider that you're not just authoring but doing additional processes. I can author and create iso for about 4Gb of files in approximately 20 - 25 minutes. I set up directories to alternate physical drives on each step of the process. I'm running a dual 2.4Ghz AthlonXP and two 80 Gb drives.
Though I didn't do the extra step of creating an ISO, it appears that your encoding experience is similar in speed to mine (my 2.8GHz Pentium would take about 20 minutes for 4GB of material).

What I'm really wondering about is why, if you have "compliant" source material, should the VOB creation take any time at all... I have a hard drive based DVR box (from Toshiba) and when you use it to create a DVD from some material that you've recorded the burning starts right away - so from the time you fill in the last options about what sort of menus to put on the disk to the time the DVD is finalized its 14-15 minutes to burn a full 4.7GB disk. What I'm thinking is: if all your source was compliant then VRD should be able to just assemble the VOBs on the fly and feed them into the burning software as it needs them. So instead of 20 minutes plus burn time, you just have the burn time.
 

phd

Super Moderator
I have not seen an authoring program that starts burning before authoring the complete DVD folder first.
 
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