02-28-2004, 01:43 AM
when resizing I totally reccomend Bilinear resize for downsizing your anime titles. Bicubic is better suited for enlarging a file. JASC backs me up on this.
as for audio, I totally reccomend 44khz over 22 and especially 11 or 8. The sample rate is NOT going to adversely effect the total file size. TO make a point of this, I decided to make 4 mp3s from a 20 minute Wav of a song I have. Normally, I would go for something complex (like a techno song. A friend of mine's favorite song to test with is Emerge from Fischerspooner because of the infinite sine sawtooth wave that is used), however, I wanted to go with something that is easy to see (considering most anime episodes hover around the 20 minute mark).
To start off, I used a 160 kbps mp3 as my source. i ran it through winamp to create a wav to use with Lame (as lame is finnicky about encoding an mp3 from an mp3). THe mp3 is 21:40 in length and is 44.1khz. Here are the lame settings I used:
-h --ABR 128
Average bit rate VBR of 128 (usually goes under) high quality
-h --ABR 128 --resample 22
VBR 128 resampled to 22khz
-b 128 -h
CBR 128 kbps, high quality
-b 128 -h --resample 22
CBR 128 kbps, hq, 22khz
Here are the results:
-h --ABR 128 -> 18298kb
-h --ABR 128 --resample 22 -> 20220kb
-b 128 -h -> 20309kb
-b 128 -h --resample 22 -> 20309kb
If you notice, the 22khz mp3 actually had a larger file size in VBR...nuts to that theory, and we should all know by now that Time*bitrate = size, and the sample rate affects neither time or bitrate.
now, this is just to give an idea of file size between the different rates. I couldn't really determine sound quality because I used the nutcracker suite, and it didn't have any real loud noises, or wide use of the aural spectrum, so I turned to Fischerspooner to test sound quality of 22khz. First of all, I'm sure everyone knows that sound is caused by waves that vibrate at a certain frequency. THe human ear can hear a very wide. 44.1khz is the range at which the music we're listening to is playing at, by cutting it in half to 22, we are in effect cutting the total amount of sound we can hear from a piece in half. Now, when I listened to another song at 22khz, I noticed that both the highs and lows were both cut significantly. Giving inferior sound quality.
In the end, stick with 44.1 (or 48 if you're ripping from DVD).
as for audio, I totally reccomend 44khz over 22 and especially 11 or 8. The sample rate is NOT going to adversely effect the total file size. TO make a point of this, I decided to make 4 mp3s from a 20 minute Wav of a song I have. Normally, I would go for something complex (like a techno song. A friend of mine's favorite song to test with is Emerge from Fischerspooner because of the infinite sine sawtooth wave that is used), however, I wanted to go with something that is easy to see (considering most anime episodes hover around the 20 minute mark).
To start off, I used a 160 kbps mp3 as my source. i ran it through winamp to create a wav to use with Lame (as lame is finnicky about encoding an mp3 from an mp3). THe mp3 is 21:40 in length and is 44.1khz. Here are the lame settings I used:
-h --ABR 128
Average bit rate VBR of 128 (usually goes under) high quality
-h --ABR 128 --resample 22
VBR 128 resampled to 22khz
-b 128 -h
CBR 128 kbps, high quality
-b 128 -h --resample 22
CBR 128 kbps, hq, 22khz
Here are the results:
-h --ABR 128 -> 18298kb
-h --ABR 128 --resample 22 -> 20220kb
-b 128 -h -> 20309kb
-b 128 -h --resample 22 -> 20309kb
If you notice, the 22khz mp3 actually had a larger file size in VBR...nuts to that theory, and we should all know by now that Time*bitrate = size, and the sample rate affects neither time or bitrate.
now, this is just to give an idea of file size between the different rates. I couldn't really determine sound quality because I used the nutcracker suite, and it didn't have any real loud noises, or wide use of the aural spectrum, so I turned to Fischerspooner to test sound quality of 22khz. First of all, I'm sure everyone knows that sound is caused by waves that vibrate at a certain frequency. THe human ear can hear a very wide. 44.1khz is the range at which the music we're listening to is playing at, by cutting it in half to 22, we are in effect cutting the total amount of sound we can hear from a piece in half. Now, when I listened to another song at 22khz, I noticed that both the highs and lows were both cut significantly. Giving inferior sound quality.
In the end, stick with 44.1 (or 48 if you're ripping from DVD).