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Old 9th June 2002, 08:02   #7  |  Link
dvd2svcd
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Q65: DVD2SVCD fails witk IO Error 87 when extracting the Audio (or subtitles), how can I avoid this?
A:
The error happens because you've ripped to one big vob file. Don't do that. Use dvd2svcd to rip the movie with instead.

Q66: What are the good and bad points of CBR and VBR encoding?
A:
In short CBR has two advantages.

1. It's quicker
2. It guarantee's consistent quality throughout.

CBR has disadvantages:

1. Wastes bits on scenes that don't need them.
2. Can force you to use a lower bitrate in complex scenes for the same amount of space as VBR.

VBR has the following advantages:

1. Space is better used.
2. Uses more bits in complex scenes where needed.

VBR has the following disadvantages:

1. Slow
2. Can make mistakes and not use enough bits in complex scenes. (The amount of errors decrease with each pass until around 4 where it no longer has much to do.)

In short there is no reason to use VBR if your Avg bitrate of a CBR encode will be around the same as your MAX bitrate of a VBR encode for the same number of cd's and video length. The more these start to seperate the more reason there is to use VBR.

Q67: How Do I convert PAL to NTSC?
A: There is no simple one click easy way to do this, but Bach has come up with a couple of methods to try that seem to work more then they do not. Be aware that this solution must be used for Progressive_PAL->NTSC conversions. If the source is PAL_interlaced, it is necessary to deinterlace at first.

there are two ways to use DVD2SVCD to do pal->ntsc conversions. A dirty (and VERY easy) way and a elegant way.

a) dirty way:
a.1) checkmark "edit as part of video encoding", in order to edit the avs file;
a.2) edit the avs including the following two lines bellow of every other line:

Code:
bilinearresize(480,480)
convertfps(29.97)
PS: there is another dirty way which is used by professional converters which works for PRIVATE (that producer of porno movies). The playback is more smooth and have less blending. You MUST encode as interlaced. You just need to edit adding the following lines:

Code:
bilinearresize(480,480)
convertfps(29.97*2)
assumeframebased()
separatefields()
selectevery(4,0,3)
weave()

b) elegant way:
b.1) repeat a.1;
b.2) include these lines
Code:
bilinearresize(480,480)
assumefps(23.976)
b.3)ok;
b.4)perform pulldown.exe after CCE's work. Stop DVD2SVCD;
b.5)correct the time length of the audio file using WLA;
b.6)rename the pulldowned file and restart DVD2SVCD from muxing and cutting.

Q68: How do I do a VCD with DVD2SVCD?
A: The easiest way would be to load the VCD-Settings.ini file that you can find in the DVD2SVCD directory. To do this simply go to the Misc Tab and click on load settings. Then select the VCD-Settings.ini file and the most common VCD settings will be there for you.

Q69: I am trying to make a XVCD and the final mpg or VCD will not play correctly or work at all. How can I avoid this?
A: When you make a XVCD and raise or lower the bitrates you will need to find the correct mux setting of BBmpeg on your own. Automatic doesn't seem to work well with VCD mpeg video. The easiest way I have found is to use the setting DVD2SVCD uses as a starting point and if your bitrate is higher then the 1150 CBR rate that a standard VCD uses then you will need to raise the force mux rate and if the bitrate is lower then you need to lower it. It may take a few tries to get it right. Watch BBmpeg and see if there are any overflow errors. If there are stop the muxing, close both DVD2SVCD and Bbmpeg, start DVD2SVCD, load the d2s file, raise the forced mux rate of BBmpeg and continue. Keep doing this until you get no errors while watching the muxing. Try and use as low a mux rate as possible while not getting any errors. Once you have found a succesful rate you can continue to use that rate as long as your future encodes use the same bitrates. As an example I have found that by using a CBR video bitrate of 1500Kbit and an audio bitrate of 224 I use a force mux rate of 4420.

Last edited by dvd2svcd; 26th February 2003 at 10:45.
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