Audio - changing 192k down to 128k... posible?

[vhelp]

Since I haven't seen this anywhere on this site, is it
posible in tmpg?
When I demux an .mpg file, and tmpg give me the
.m2v /.mp2 files, how do I change the .mp2 audio file from
192k downto 128k ?

Is this posible, or is there another way?
Thanks!

[Truman]

I suggest to decompress the audio first.
Select the *192.mp2 as audio source, select file> output to file > WAVE file> save.
Then select the the original video source as video source (to avoid sync problems), the new .wav as audio source. Configure the audio output at the Audio tab and select "audio only". So you'll end with a new *128.mp2, that you can multiplex with the .m2v file.
File> MPEG tools> simple multiplex.

[vitualis]

If you use TMPGEnc to encode your MPEG-1 Layer 2 audio, you should consider getting the tooLame plug-in. TMPGEnc's native audio encoding is not very high quality.

Regards.

[vhelp]

Vitualis, for the project(s) I'm working on, I'm not encoding with
tmpgenc. I'm only demux/muxing so that Nero will accept
my mpeg-2 clips. Apparently, the pvr is not svcd compliant in
any way. I've manage to get the pvr to cap at 2.520 Mbits, but
the audio is at 192k. This is why I asked this question (post here)
for the audio conversion. My encodes (captures) are from several
hardware** mpeg-2 boards I'm currently testing.

Truman, I will try your method a little later on - it's 7:50pm here.
I'm currently caping ST-E (Enterprise) right now with the pvr.
So far, I IMO, the DVC II SUCKS! The pvr, thouigh 352x480
gives excellent quality when burned to svcd CD and played on my
13" tv. There is, however blocks, depending on the quality of the
show being played on satalete.

** since tmpgenc is now ONLY supporting the Intel chips I've
decided to look elsewhere for encoding, maybe hardware, most
likely. I am currently trying a few capture boards, the DVC II
and the Wintv PVR, and one other board I got from a friend.
I like my dc10+ card very much and would continue to use it if
I had a decent enough encoder that was fast. Tmpgenc is not
fast at all, but I've ben baring it because it's the ONLY one that
has ben working for me. Unfortunately, the author doesn't like
AMD, (may be working with intel) and is no longer supporting
any features for AMD (not that author has ever). This is what
makes me madder as hell. But, I'll just look elsewhere. I've
heard people say, "Its worth the $20 or $80 bucks!" I say,
"Bullshit!" It still hasn't fixed the audio synch that we all seem
to have (a those long clips). This has been an issue for a long
as I can remember. I know, I know, some of you's are NOT
having any audio sync problems. I am!! I try and encode small
5 or 10 minute clips (learned to live with it), so audio is pretty
much in sync. Anyways, I that's just one of the problmes with
TMPG. I have a number of enhancements to add, as suggestions,
but I wouldn't give it to author, being that he's going elsewhere
in CPU support - this would be suicide!

Thanks.

[Tearren]

Hello!

Under settings (using TMPGenc 2.0) I goto the Audio tab. In the selection for "Bit rate" just select "128". I use this setting all the time for my SXVCD's and they play fine. Saves a little extra space for the video too.

Tearren

***Sorry vhelp, didn't fully read your later post about not using TMPGenc to encode... Never mind***

<font size=-1>[ This Message was edited by: Tearren on 2001-10-21 20:53:16 ]</font>

[aguillon]

Audiosynch in TMPGENC is indeed a problem. To solve it, demux the audio to a wav file using Virtual Dub, then encode using the original video as video input, but your WAV file as audio. It solved the problem for me.

[Kdiddy]

"since tmpgenc is now ONLY supporting the Intel chips I've
decided to look elsewhere for encoding, "

Can expand more exactly what you mean here, because the latest version has support for MMX/MM2 & 3Dnow...but Im assuming you mean something else outside of those?

[vhelp]

Kdiddy,

I read somewhere (here or elseware) that tmpgenc was now going
to be OPTIMised for Intel chips, and not AMD! I now about the
3dnow and mmx.
That's why I've decided to look elsewhere
for an easier less time consuming approach to making my svcd
cd's, via a capture card - the hardware mpeg-2 cards.
So far, I much like the pvr better than the dvc ii. The pvr's
quality is sharper, and less pixelate, and looks like my satalete
source! Anyway, I guess you could say that that finding is what
pushed me over the edge. ..."not another one going to the
other side!" thing.
I have an AMD 900mhz w/ pc133 128ram. I haven't heard
anything about tmpgenc support anything (instruction set) later
for AMD chips in the future.

I'm sticking with whatever version(s) I have and will continue to use
them under certain cases, hence my audio demux/muxing jobs.
Yes, I could prob. use bbmpeg, but that's a little too confusing for
me. And, I haven't ben able to get it to work for me. So, I use
tmpg for the demux/muxing jobs. Oh, and also for when I encode
after I capture with my dc10+ card. Even after I've made a decision
on what hardware mpeg-2 card I choose, I'll still want/have a need
to use my dc10+, but probably not as much. Anyways. . .
I only wish that tmpg had a batch job for the muxing job. Where I
can just drag a bunch of .mpg files and job will spill out re-mux'ed
files, not ONE big mpg file. Don't want to merge. I have to do each
file seporately. A pain in the ass.

Also, since the pvr doesn't have a pause feature, it's not worth stoping
and restarting a capture, as it takes 5 to 10 seconds to initialise, and
sometimes, I get undesireable side affects if I try that. So, I just let
the card capture the whole hour. At 2520Mbits, filesize is approx 1.2gigs

Cutting this 1.2gig file into 5 or 10 min. sections is another story!
I haven't even begun to figure on which app to use for this task. I would
love to here some recommendations on best app for this job. Naturally,
the file will be Mpeg-2. Maybe there's an app that will do both, cut video
and remux audio in the same setting. Probably wishfull thinking, but
who know. Yes, anyone know of such?

Aguillon,
I thought virtual dub didn't process MPEG files! If it does, please
ilaborate on this. Thanks!

Thank you all for your time.

[Kdiddy]

O well if you say so, Im please with TMPG use of my 1 Ghz Tbird...but yes BBmpeg will cut at whatever desired time you specify and remux to..I ALWAYS use it to remux, never with TMPG..BBmpeg is very straight forward to use.

[vhelp]

Kdiddy,

Thanks for your quick reply!

One of the problems with bbmpeg's cutting (that I don't like) is
where you enter the numbers for cutting. I don't and wont know
the numbers (exact spot) to cut EACH segment where commercials
are, etc. I need the aid of a time line or tmpg's [x] source where
you can mark the scens for encoding.

Anyways, after I finished caping ST-E (enterprise) this evening, I
went streight to the cutting room. I loaded up dvc II's movie star
and draged the file into the timeline. In short, it took me about
20 minutes to cut the commercials out. Well, it was my first time
ever using the timeline in movie star. Anyways, after all that editing,
I went to Produce (hoping to save EACH segment or split) and guess
what? I refused to continue! Why, because I yanked the card out
to fix some IRQ conflicts. And, I got tire of the dvc II, as well.
So, that screw me big time!

Anyways, on another note, I dont' know if you have the dvc ii, but
I did try most of the resolution settings, 352x480, 480x480,
704x480 and 720x480. Not one could yeild the results I got with
the pvr. I have the USB model. It only support 352x480, but
when I burn to cd, the quality is awsome. (IMO)
I thought that if Iuse the 720x480, I'd get better detail and
sharpness out of this dvc ii. WRONG!! Well, at least not with
my satalete! It's still blurry! DVDs are a little better, but at each
resolution, the quality of the cap was the same. IMO, best to stick
with 352x480 for capping with the dvc ii.

I tested above with a DVD capture. I capped the same position in
the dvd movie. In short, the pvr produced a duplicate of the dvd
quality. Really mean it. I will run some more test on this with
other dvd movies, just to be sure. If it turns out to be true with
the other dvd movies, then, you guested it. I will use the pvr as
my dvd backup (as svcd's). I mean, why bother with spending 15
hours (as I have many times in the past) ripping then encoding
to svcd - 15 hours! When I could do it in an hour and 33 min or
so? I'm telling you, the WinTV PVR is (so far) the best hardware
mpeg-2 capture card I've layed my hands on! And, it looks very
much like I'm gonna go with it.

On another note, I'm working on getting DSL. I have to wait for
my provider to rec'v the kit in the mail. Whatever that means.
My provider said I would get 600k download speeds, and 3 or 400k
upload speeds. Once I get this I'll be able to share my caps
with you all (well, those who have fast connections).

Thanks again.