Why lower framerate

[Rennie]

My first question is. Do all the rules for a 700 mb rip apply to a smaller rip? (by that i mean the .20 bits/per pixel * frame and 65% compressibility test)
I have ripped several dragonball z dvd's now.
i wanted the filesize to be 200 mb per/episode (that's the same as the dvd, 3 episodes per cd)
now i also had to use deinterlace or else the rip would get interlaced as wel. my very first rip was 40 mb smaller than the desired filesize. how is this possible? i thought it calculated the bitrate by means of the filesize? (use gordianknot)

now my second question..
what is the reason of lowering the framerate?
the length of a dvd always stays the same. or else you get the same movies with different lengths. If the length stays the same that means that the number of frames has to decrease when you lower the framerate right?
now when in get to the second pass it gives warning that the number of frames counted is less than the original number of frames. so at the last moment it is going to correct that and change the bitrate (it always gets lower, because it wants to reach the desired filesize)
So why do i have to lower the framerate in the beginning and therefore decrease the number of frames when he is going to use the original number of frames anyway?

[Teegedeck]

Originally posted by Rennie
My first question is. Do all the rules for a 700 mb rip apply to a smaller rip? (by that i mean the .20 bits/per pixel * frame and 65% compressibility test)

AFAIK you can only choose 700 or 1400 MBs as desired filesize in GKnot. If you want to reach a different filesize, you have to take a byway and calculate the filesize with a different bitrate calc, then go back to GKnot and enter a _bitrate_ instead of a filesize.

But it is much easier to create only _one_ .d2v file for all your DBall-episodes that you want to put onto one CD and calculate 700 MB for that .d2v!


i wanted the filesize to be 200 mb per/episode (that's the same as the d
now when in get to the second pass it gives warning that the number of frames counted is less than the original number of frames. so at the last moment it is going to correct that and change the bitrate (it always gets lower, because it wants to reach the desired filesize)
So why do i have to lower the framerate in the beginning and therefore decrease the number of frames when he is going to use the original number of frames anyway?

...its sounds as if you have used IVTC only on the second pass. You have to use it on the first pass, too! Always use identical filters for both passes. Either that or you opened the .d2v-file in GKnot after loading the .stats-file. Don't choose to correct anything.

Regarding you question: reducing the framerate means that the same bitrate gets distributed on fewer frames, thus more bits per frame are used - you gain quality. You don't loose anything here, as Anime originally is produced with 16 frames/second. You can't reduce it to that framerate, though, because 'camera movements' would get very choppy... Just use a good IVTC-plugin like Decomb with the standard settings recommended in the helpfile, that should do it.

[diji1]

AFAIK you can only choose 700 or 1400 MBs as desired filesize in GKnot.

...actually u can choose any filesize u like - just change the total file size figure or the br in "calculate avi file size" mode on the "bitrate" tab :).

[Rennie]

its sounds as if you have used IVTC only on the second pass.
actually i didn't use ivtc. i used fast deinterlacing.
but should i use ivtc?
as for the filesize. you can enter a filesize manually... as for using it in the first pass only. where can one change such a thing, the same question goes for choosing not to correct bitrate. where the hell can i change such things.?
thnx for you help