Re: details video format upload to youtube
- From: "Bill's News" <billsnews@xxxxxxxxxxx>
- Date: Mon, 20 Aug 2007 13:11:00 -0700
"tg" <tg@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:46c633b1$0$13928$fa0fcedb@xxxxxxxxxxxxxxxxx
for best video results I know that youtube asks for:
MPEG4 (Divx, Xvid) format
320x240 resolution
MP3 audio
30 frames per second
but I have my reservations about whether this is really best
for the
video or simply best for youtube. I've been uploading videos
using
this format and they don't look good. Some videos I've watched
(other
peoples) play really well. They're smooth and clear and sharp.
My
uploaded videos are blotchy and fuzzy so I don't know where
I'm going
wrong because they look great when I play the original on my
hard
drive. I've also tried some other different formats but they
still look bad.
If your videos look good quality on youtube I'd be grateful to
know
the details about the format you use and what software you use
to
encode as well. Thanks for any pointers.
I just took a 1:17 clip from an ABC HDTV show - trying to find a
scene similar in lighting, motion, and content (sorry, no dog),
I could only find one in a 720p capture and none among the 1080i
presently on the capture machine.
Using VDub-MPEG2 to process the clip to xvid, I made two
versions:
1) 320x180 (~16:9) at 1000 bps (less than 100 MB per 10 minutes)
2) 320x240 at 2000 bps
(kind of an anamorphic 4:3 which can be viewed at 16:9 with
some players).
In both I turned all xvid scan parameters to max and made two
passes.
When viewed on a 42" display from ~9' the 320x180 image looked
to me to be as good as most OTA analog with the exception that
it was in the proper aspect ratio 16:9. The 320x240, of course,
looked even better played via MPC and stretched horizontally to
the proper aspect.
Since it is copyrighted material, I'm reluctant to post it on
the net.
The precise xvid settings:
Quality preset: (user)
MSP (motion search precision): 6 - Ultra high
VHQ mode: 4 - wide search
x use vhq for b-frames too
x use chroma motion (do NOT use turbo)
frame drop ratio: 0
max i-frame interval: 60
Quantizer restrictions maxed at 1/31 for I, P, & B frames
x trellis
all other options at default or off.
Target bit rate was 1000 for one test and 2000 for the other.
I used VDub's resize (bicubic) to scale the 1280x720 image as
indicated.
.
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