What are the best options for high quality and compactivity, I am currently using
sony psp - Xvid - aac - 368x208 pixels - 16:9 - 29.97 - 384kbps Video Bitrate - (Ticked Box) High Quality, Stretch it, 48K Audio - 48000 Sampling Frequency - 2 Channels - 128kbps Audio Bitrate
the video does come out slightly pixelated, sometimes looks better using H.264/AVC video codec, do I need to increase the video bitrate or what?
please note I am converting from ripped DVD files (100% Top Quality)
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yes with a a full 29.97 frame rate you need to increase the video bitrate, 384 is to low for that frame rate, i recomend a minimum of 576 and it should probably be even higher
I use 288 and 15 fps on a cell phone at 320*240 , 576 is double the bitrate to keep up with double the frame ratem too have the same amount of data per pixel per frame
is there a bitrate calculator for this that doesn't determine the bitrate over the 'target size' (I want it to be dermined by the resolution and aspect ratio) and gives you a variety of video codecs (or do the video codecs not matter?)?
several aspects to codecs,
but most important in portable situations , is does the device have enough processing power, to de-compress a highly compressed stream and play it back it back without stutter or jumping
my phone will play h.264
but i find that mpeg4 with a slighlty larger file will give just a clean & sharp picture, with less strain on the processer, so movies playing from the 2gig memory card play smoother than h.264, even though techincaly the h.264 has more detail
like my eyes can tell there is more detail on a 2.8 display, in an action movie, nada
but how would I know how much video bit rate is appropriate for the resolution I have chosen and the not the target size?
what is the screen resolution ? maybe i can give you a starting point suggestion.
once you find the bitrate, that displays too your liking, the file size will always vary according to lenght and amount of movement/pixel change in the scenes
but you can always use that bitrate
368x208 is my usual resolution
try 288 for 15fps or under
and 576 for 23.976 - 30 fps
if you think the file size is too big you and try reducing the bitrate
for 24fps and up I would NOT go lower than 386,
Nitro89: yes you can do almost anything with avisynth. I suggest you check out the wiki on internal filters
If you want an easier (i think better) way for psp conversions, I suggest ripbot264 which has a psp profile. You can also crop, resize, and change output speed in the options easily (it makes a script for you). Here is a sample collage of some of the options: