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From: Doc on 23 Apr 2008 16:57
Experimenting with uploading stereo .flv files to Youtube. From what
I've been reading, the trick is to convert to flv that's under certain
bitrate thresholds so that YouTube doesn't re-convert them. However,
I'm getting inconsistent results.

Here are some short files ~11 secs, all files converted from DV avi
using Any Video Converter ver 2.5.9

Video 1 - The words "Stereo Test" against a black background and a
test tone panned alternating extreme L & R. Obviously in stereo

http://www.youtube.com/watch?v=J8MWWaXMV04

Specs:

Size 220x176
Video bitrate 256 kbps
Framerate 15fps
Audio Codec mp3
Audio rate 128 kbps
Sample rate 44.1
A/V Sync Basic
Original DV file size 43,584kb
flv file 188kb


Video 2 - A Short segment of a music video made with the exact same
specs as above but doesn't appear to be a stereo field

Original file size 43,952 kb
flv file 578kb


http://www.youtube.com/watch?v=vkWm3jOAYzw


Video 3 - Same video as #2 but the audio from #1 above to demonstrate
it's obviously in mono

Original file size 43,952 kb
flv size 578 kb

http://www.youtube.com/watch?v=WSHe2lk2g8E


Another observation is that the original source files are slightly
different in size even though they're the same length - however 2 & 3
are the same size even though they have different audio but are are
larger than 1. Further, there's a tremendous difference in the the
resulting flv files - 2 & 3 are over 3x the size of #1.

Any thoughts or input as to why I'm getting stereo from one file but
not from the others with the same encode settings? Also, what explains
the difference in the size of the files? Why is the ratio of file size
difference so much greater with the flv files than the original files?

I found this one that has pretty decent sound - very distinct stereo
separation and the highs aren't badly brittle and aliased sounding.

http://www.youtube.com/watch?v=nD3Hhzgqkrc&NR=1

I wonder how this was done? It was just added recently so it was after
some changes YouTube apparently made back in Feb. that I gather made
it more difficult to incorporate stereo sound.

Thanks for all input.
From: Doc on 23 Apr 2008 19:19
Nevermind, I divined the answer. Took the vids down.

From: Jacques E. Bouchard on 24 Apr 2008 08:33
Doc <docsavage20(a)yahoo.com> wrote in news:dbb60c40-0ec3-49f2-88e5-
f5cc1488e506(a)34g2000hsh.googlegroups.com:

> Nevermind, I divined the answer. Took the vids down.

So, er, are you going to share your answer with the rest of us?


jaybee
From: Doc on 24 Apr 2008 18:39

"Jacques E. Bouchard" <invalid(a)invalid.invalid> wrote in message
news:Xns9A8A571A28467jebouchard451yahooca(a)63.218.45.252...
> Doc <docsavage20(a)yahoo.com> wrote in news:dbb60c40-0ec3-49f2-88e5-
> f5cc1488e506(a)34g2000hsh.googlegroups.com:
>
>> Nevermind, I divined the answer. Took the vids down.
>
> So, er, are you going to share your answer with the rest of us?


Actually I'm not so sure now that I've found the answer. I'm still
getting
inconsistent results. I got one file to work at 128kbps but so far
haven't
been able to duplicate it with other source material. Not sure what
the
difference is.
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