Sidebar Sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

iPod touch Good Bitrate For iPod Touch Videos

Oh, im sorry I didn't realize you are using windows.
try DVD decryptor or DVD Shrink,

if you are using linux, thats even better, you can use DVD shrink through wine, or just use k9copy, acidrip, DVD::Rip etc, etc.
 
Yep, using Windows until I can get my Mac back up and updated. Sorry, I should have specified.

I'll check out DVD Decrypter. Thanks.
 
I use 1.00 with regular MPG. I would drop considerably lower with h264 to say 600 but I love the speed of Nero Recode with regular mpg. I convert a 1 hour media center recorded episode in 14 minutes.
 
madmaxmedia said:
At 500 kbps, I get only a slight amount of noticeable visual artifacts, if at all. If I was specifically looking for compression artifacts (instead of just watching the movie), I might notice more.

Doubling my file sizes (say at 1000 kbps) wouldn't be worth it to me, compared to say the extra amount of music I could put on it.

But yeah, it's a tradeoff no matter what (on the Touch due to storage capacity), and the best balance is going to be different for each person.
Click to expand...

Yeh, as you said, it varies from person to person. I've only got 2.5GB of music, so the rest is free to fill up with videos. At the moment i've got 13.6 hours of TV shows taking up 6.3GB, so that's pretty good space economy for me, at that rate I could probably fit 30 hours worth of stuff, and I don't think i'll need that much at one time. I usually don't have this much tv, but all the new shows have started, so my download limit is getting a workout :)
 
I have done direct comparisons between movies encoded from DVD at both 500kbps and 1000kbps in H.264 via Handbrake.

My observation is that with the higher bitrate the image is a bit more "pleasing" with better color, a bit brighter and it is also sharper.

Having said that, 500kbps still looks quite good and obviously the filesizes are much more attractive. Also keep in mind that with Handbrake these will be VBR encodes, so the actual bitrate will vary with the value you set being the target bitrate as an average for the whole encode.

After seeing the improvements with the higher bitrate material for some movies I will be doing my next test at 768kbps to see what that does for me.
 
jmpage2 said:
After seeing the improvements with the higher bitrate material for some movies I will be doing my next test at 768kbps to see what that does for me.
Click to expand...

I'd be interested to hear your results. As I mentioned earlier, I was pretty sure I could tell the difference between an 800kbps encode of CSI when compared to a 1000kbps one, but it may have just been my eyes deceiving me. I also did a 1300kbps one, but the file size of this was larger than the original file, and I couldn't spot a difference between it and the 1000kbps version.
 
clevin said:
10% graphic quality improve, 2-3X times longer time to encode.

but actually, you don't have choice on iPT anyway..
Click to expand...


MPEG4 doesn't encode any faster on my 3.2ghz dual core rig than H.264. In both cases a two hour movie encodes in about 30 mins.
 
jmpage2 said:
MPEG4 doesn't encode any faster on my 3.2ghz dual core rig than H.264. In both cases a two hour movie encodes in about 30 mins.
Click to expand...

DoFoT9 said:
yes please explain.....
Click to expand...

Dave10492 said:
Why not? What do you mean 'you don't have choice'?
Click to expand...

sorry Im late for discussion :)

I was only meant to say that iPod touch only support limited codecs and you don't really get to try others codecs like xvid/divx, which you can encode faster with ffmpegx/mencoder.
 
clevin said:
sorry Im late for discussion :)

I was only meant to say that iPod touch only support limited codecs and you don't really get to try others codecs like xvid/divx, which you can encode faster with ffmpegx/mencoder.
Click to expand...

Actually, MPEG4 is sort of a gray area, because it sorta seems like both a container and a codec standard.

When you rip with HandBrake and encode in MPEG, you can use the Xvid encoder. The right Xvid profile is compatible with the iPods.

AVI files encoded with Xvid are not compatible, but if the right Xvid presets were used then maybe its more of a wrapper issue. I don't know.
 
For what it's worth, I've been using much lower bit rates with fairly good results, using Nero Recode. 300 kb/s for video and 48 for audio. On animation like South Park and the Simpsons I've taken it down to 250. 2 pass, highest quality - things encode in roughly half their original playing time on my Intel Quad PC.

I'm not going to pretend they are DVD quality, or will scale very well on a monitor, but if you want to pack a whole season of Heroes into 2.4 GB, or Superman Returns into 389 mb, it can't be beat. ;) I haven't been able to achieve similiar quality with other (PC-based) tools. Googling my username and the titles I've mentioned will bring up download links
 
Low bitrate encodes

Another thing to consider- if you are going for really low bitrates (300 or so), you might want to try lowering the resolution to 420 x 280 or even 320 x 240. The video will scale pretty well on the Touch screen, and you might get better overall image quality since you will have less compression artifacts.

(basically, at some point a sharper, higher-res image isn't going to be much use if it's full of compression artifacts.)
 
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back