What are the specs for iPod video

Question

i wish to manually convert .mov (video with audio) to vPod format.
anyone know where there is a list of the specs required, movie size, format, audio format?
i'm trying to figure out the following:
i have two movies of like nature. i drop ,them both in iTunes. i tell iTunes to convert for iPod and it says one does not need conversion. i am trying to figure out why the other does. they are both 44.1/h.264.
what is the movie size spec and all the specs for QT to vPod conversion? (i want do to it manually.)
i think i have it, is this correct: 320x180 (16:9). i assume vPod can play both 48.hz audio and that that does not have to be converted to 44.1 (both aac)?

Answer 1

QT Kirk is simply saying
you can make the file you dropped on the script in
order to make it uneditable editable once again by
loading the file in a hexidecimal editor utility and
"zeroing out" the code that makes it uneditable.
yes, i wanted to know which file to edit the script or the 'locked' movie --the .mov, thanks.
.mov
Format: AAC,Stereo (L R), 44.100kHz, H.264 Decoder,
391 x 216, Millions
FPS: 29.97
Data Size: 58.25
Data Rate: 536.90 kbits/sec
Normal Size: 391 x 216 pixels
Current Size: 391 x 216 pixels
(Actual)
The information cited does not include information regarding
the H.264 profile used to create it. If created using the QT
"Movie to QuickTime Movie > H.264" export option,
then the file would not be iPod compatible since this
workflow employs the "Main" profile. In a similar
manner, if the file was created using the QT "Movie
to MPEG-4" Export option, it would have been created
using either the "Main" or "Baseline" profile.
However, based on your dimensions, iTunes expects the
file to be created using the "Baseline Low Compexity"
profile and proceeds to correct the situation.
how can you do that via QTP expert options? if you can. i create a lot of web movies and wish to 'feed 2 birds with one piece of bread'. (i like birds.
if these are the only
conversion for iPod tools apple offers...
why?
QT Pro/iTunes currently
offers the use of two H.264 iPod compatible,
automatically adaptive workflows (Baseline LC and
Baseline) and QT Pro additionally offers one full
manual iPod compatible H.264 workflow (Baseline
profile) and one full manual MPEG-4 workflow. As to
why the QT "Movie to iPod" and iTunes workflows are
auto-adaptive, most users simply want to have iPod
compatible files when they want them and don't want
to learn how to make them properly with respect to
each compression format and/or profile requirement
and/or special case considerations (dimensions, data
rates, frame rates, key frame frequency, aspect
ratio, macroblock efficiency considerations, etc).
yes, i wish to... well, i said that above, create web and ipod in 'one fell swoop'. i suppose these ipod auto-adaptive modes will work for web, but i'd rather use the expert options. i would like to "learn how to make them properly".
> ok .m4v is h.264.
Rather loosely stated. The
".m4v" extension refers to the file container while
H.264 refers to the actual video compression
algorithm. In this case the H.264 video format is
specifically stored in this file container. One the
other hand, the ".mp4" file container is a more
generic MPEG-4 file container commonly used for
either MPEG-4 or H.264 (MPEG-4 AVC) video compressed
files. And, at the other end of the scale, the ".mov"
file container is the most generic since it can
basically contain any "supported" compression format
to include either MPEG-4/AAC or H.264/AAC iPod
compatible files. One key to remember here is that
file containers, like the compression formats that
they can contain, have specific "characteristics."
For instance, ".m4v" and ".mp4" file containers can
have one external piece of graphic "artwork"
associated with it (as seen in iTunes), but the
".mov" container cannot.
i did not know that .mp4 also served for h.264. the graphic container of .m4v i had sort of noticed, however i did not or had not for .mov, thanks.
Your file did not conform to
the required "Baseline LC" profile and so iTunes
converted it. Since the "LC" profile defaults to a
video data rate on the order of 1500 Kbps, your file
size was nearly doubled for the specific duration of
your clip.
i'm not sure i understand why my data rate was converted where a lesser data rate was not. (536 vs. 262)
thanks very much for this 'training'.