beautifuljesus
23rd December 2001, 11:52
Can anyone one tell me if this is a waste of time or not.
I always use 2 pass mode when ripping movies, but because of time I always have to run overnight. I set up Gordian Knot to do a 2 pass encode in Div 4. I set up my resolutions, cropping, bitrates etc then I just compress the video (I prefer to do the audio myself as I usually end up with sync problems when splitting a large movie if I let Gordian Knot handle the audio itself). When I open thee dvd2avi file and hit save and encode I always check the "both passes" option. From the docs that I have read there seems to be an awful lot of checking and tweaking to be done between rips. In the morning, GKnot tells me it took 6 hours and that both passes were completed normally. Now, my question is, is there any difference in quality between a one-pass encode and a two-pass encode when I don't touch any settings in between the passes. Does GKnot automatically calculate what it needs to complete a better quality 2nd pass? Or is it just doing a 2nd pass without really changing/improving anything?
The same question applies to EasyDivX. Yet i think it may be working because
1. in EasyDivx there is nothing else to do, just let it get on with it and finish.
2. The movies I encode on 1 or 2cds are usually very good quality.
3. when I split a movie over 2 cds in virtual dub I had to tinker about a bit as a direct split near the middle (between key frames) caused 2 uneven files (1st was about 520mb and the 2nd was 630mb) or something like this before i had added audio!
Is this to do with constant bitrate vs variable bitrate? I would presume so. But i still find this 2nd pass confusing as there are so many different docs regarding different programs and processing methods.
Some easy to understand explanations would be cool!
Thanks.
I always use 2 pass mode when ripping movies, but because of time I always have to run overnight. I set up Gordian Knot to do a 2 pass encode in Div 4. I set up my resolutions, cropping, bitrates etc then I just compress the video (I prefer to do the audio myself as I usually end up with sync problems when splitting a large movie if I let Gordian Knot handle the audio itself). When I open thee dvd2avi file and hit save and encode I always check the "both passes" option. From the docs that I have read there seems to be an awful lot of checking and tweaking to be done between rips. In the morning, GKnot tells me it took 6 hours and that both passes were completed normally. Now, my question is, is there any difference in quality between a one-pass encode and a two-pass encode when I don't touch any settings in between the passes. Does GKnot automatically calculate what it needs to complete a better quality 2nd pass? Or is it just doing a 2nd pass without really changing/improving anything?
The same question applies to EasyDivX. Yet i think it may be working because
1. in EasyDivx there is nothing else to do, just let it get on with it and finish.
2. The movies I encode on 1 or 2cds are usually very good quality.
3. when I split a movie over 2 cds in virtual dub I had to tinker about a bit as a direct split near the middle (between key frames) caused 2 uneven files (1st was about 520mb and the 2nd was 630mb) or something like this before i had added audio!
Is this to do with constant bitrate vs variable bitrate? I would presume so. But i still find this 2nd pass confusing as there are so many different docs regarding different programs and processing methods.
Some easy to understand explanations would be cool!
Thanks.