Help with TMPGENC

Archived from groups: rec.video.desktop (More info?)

> I'm trying to get TMPGENC to convert my DV files to half D1, but it
> keeps giving me the standard size. When it ask me for the Video bit
> rate I choose 352 x 480, but my file size is still the same size. What
> do I do?

I think you are confusing your terms. 352 x 480 is the resolution. This has
nothing to do with the final file size, just the resolution it is encoded
at. The bitrate is what determines the file size. A file encoded at 720 x
480 @ 2500kbit/sec will be exactly the same file size as 352 x 480, or even
352 x 240 @2500kbit/sec.

Archived from groups: rec.video.desktop (More info?)

"Chris M" <dontsendmeyoursp@m.aus.co.de> wrote in message
news:cqicbq$35p$1@sparta.btinternet.com...
>> I'm trying to get TMPGENC to convert my DV files to half D1, but it
>> keeps giving me the standard size. When it ask me for the Video bit
>> rate I choose 352 x 480, but my file size is still the same size. What
>> do I do?
>
> I think you are confusing your terms. 352 x 480 is the resolution. This
> has
> nothing to do with the final file size, just the resolution it is encoded
> at. The bitrate is what determines the file size. A file encoded at 720 x
> 480 @ 2500kbit/sec will be exactly the same file size as 352 x 480, or
> even
> 352 x 240 @2500kbit/sec.
>

True, but you can lower the bitrate with much less impact
on the quality of your video if you use the Half D1. Using your
example; the 720x480 would look much worse (especially in
active scenes) than the 352x480, @2500kbit/sec.

If the OP was able to "choose 352 x 480" when "asked for
the Video bit rate"; then there is a major problem with his copy
of any of the TMPGEnc Encoders. He needs to re-read the
instructions he is following, or the help for the settings he is
entering and try again.

Luck;
Ken

Archived from groups: rec.video.desktop (More info?)

Okay, so how does one normally do it?
Olushola

> >> I'm trying to get TMPGENC to convert my DV files to half D1, but
it
> >> keeps giving me the standard size. When it ask me for the Video
bit
> >> rate I choose 352 x 480, but my file size is still the same size.
What
> >> do I do?
> >
> > I think you are confusing your terms. 352 x 480 is the resolution.
This
> > has
> > nothing to do with the final file size, just the resolution it is
encoded
> > at. The bitrate is what determines the file size. A file encoded
at 720 x
> > 480 @ 2500kbit/sec will be exactly the same file size as 352 x
480, or
> > even
> > 352 x 240 @2500kbit/sec.
> >
>
> True, but you can lower the bitrate with much less impact
> on the quality of your video if you use the Half D1. Using your
> example; the 720x480 would look much worse (especially in
> active scenes) than the 352x480, @2500kbit/sec.
>
> If the OP was able to "choose 352 x 480" when "asked for
> the Video bit rate"; then there is a major problem with his copy
> of any of the TMPGEnc Encoders. He needs to re-read the
> instructions he is following, or the help for the settings he is
> entering and try again.
>
> Luck;
> Ken
>
>

Archived from groups: rec.video.desktop (More info?)

> True, but you can lower the bitrate with much less impact
> on the quality of your video if you use the Half D1. Using your
> example; the 720x480 would look much worse (especially in
> active scenes) than the 352x480, @2500kbit/sec.
>
> If the OP was able to "choose 352 x 480" when "asked for
> the Video bit rate"; then there is a major problem with his copy
> of any of the TMPGEnc Encoders. He needs to re-read the
> instructions he is following, or the help for the settings he is
> entering and try again.

Absolutely. Maybe I misunderstood, but it sounded to me like he expected to
get a smaller file size by lowering the resolution. I am a big fan of 352 x
480 myself, I just wanted to make sure the guy understood the relationship
(or lack of?) between resolution and bitrate.

Archived from groups: rec.video.desktop (More info?)

I guess I don't. Please explain. My objective is to get a smaller file
size so I can fit more information the disc.

I guess I should use something other constant bit rate, right. If so,
what should that be. The motion is fast dancing.

Olushola

"Chris M" <dontsendmeyoursp@m.aus.co.de> wrote in message
news:cqin37$dvb$1@sparta.btinternet.com...
> > True, but you can lower the bitrate with much less impact
> > on the quality of your video if you use the Half D1. Using your
> > example; the 720x480 would look much worse (especially in
> > active scenes) than the 352x480, @2500kbit/sec.
> >
> > If the OP was able to "choose 352 x 480" when "asked for
> > the Video bit rate"; then there is a major problem with his copy
> > of any of the TMPGEnc Encoders. He needs to re-read the
> > instructions he is following, or the help for the settings he is
> > entering and try again.
>
> Absolutely. Maybe I misunderstood, but it sounded to me like he
expected to
> get a smaller file size by lowering the resolution. I am a big fan
of 352 x
> 480 myself, I just wanted to make sure the guy understood the
relationship
> (or lack of?) between resolution and bitrate.
>
>

Archived from groups: rec.video.desktop (More info?)

"Olushola" <balagi@starpower.net> wrote in message
news 8ydnfS1i_3ofFHcRVn-oQ@rcn.net...
>I guess I don't. Please explain. My objective is to get a smaller file
> size so I can fit more information the disc.
>
> I guess I should use something other constant bit rate, right. If so,
> what should that be. The motion is fast dancing.
>
> Olushola
>

Assuming that the disk you mention is a DVD, that you want
to play in a settop DVD player, for display on a normal TV; then
I would try the following settings to start:

"MPEG-2 352x480 29.97fps CQ_VBR 90, Layer-2 48000Hz
192kbps" That is "Automatic VBR (CQ_VBR). I would also
set the "Motion search precision" to "High quality (slow)" at least.

From there you will have to try changing the factors involved to
find what works best for you. How you perceive the results can
be very subjective. The same encoding can appear slightly different
when viewed on different players. You will have to establish what
you find as the "Best" compromise between amount on the disk and
the image quality you can enjoy.

Luck;
Ken

Archived from groups: rec.video.desktop (More info?)

Thanks much, I will try that.

Olushola

> Assuming that the disk you mention is a DVD, that you want
> to play in a settop DVD player, for display on a normal TV; then
> I would try the following settings to start:
>
> "MPEG-2 352x480 29.97fps CQ_VBR 90, Layer-2 48000Hz
> 192kbps" That is "Automatic VBR (CQ_VBR). I would also
> set the "Motion search precision" to "High quality (slow)" at least.
>
> From there you will have to try changing the factors involved to
> find what works best for you. How you perceive the results can
> be very subjective. The same encoding can appear slightly different
> when viewed on different players. You will have to establish what
> you find as the "Best" compromise between amount on the disk and
> the image quality you can enjoy.
>
> Luck;
> Ken
>
>

Archived from groups: rec.video.desktop (More info?)

> I guess I don't. Please explain. My objective is to get a smaller file
> size so I can fit more information the disc.
>
> I guess I should use something other constant bit rate, right. If so,
> what should that be. The motion is fast dancing.

Like I said, the resolution is completely irrelevant regarding the file
size. As you know, any computer file is x amount of bytes/kilobytes. The way
a digital video file works is that you tell it how many bytes to use per
second to reproduce your original video. That's the bitrate. Higher values
result in larger file sizes and - all things being even - better quality. If
you use 2500kbit/sec on a 352 x 480 (half D1) file, it will usually give you
better quality than 2500kbit/sec on a 720 x 480 (D1) file, as there are less
bytes available per pixel than is the case with the 352 file. Both files
will be exactly the same file size, though, as they are both allocated
2500kbit per second.

It's a good idea to use one of the variable bitrate encoding methods, as it
distributes the available bytes more efficiently throughout the file and you
end up with better quality. 2-pass is a good place to start, as you have
complete control over the final file size, as opposed to CQ which just uses
as many bytes as its allowed to get the best possible quality, and as a
result the final size if difficult to predict.

If your original video is DV, you might get better quality from 720 x 480.
352 x 480 is great for VHS, lower quality sources, or if you are just
looking to cram a lot of video onto a single disc. How long is your video?
If you do a 2-pass encode at 720 x 480 with a bitrate of 4700kbit/sec and
192kbit/sec audio, you should be able to fit around 2 hours of video on a
single disc, and still have a little bit of space left for a menu. You might
even be able to lower the bitrate a little if you need a bit more, but I
wouldn't suggest you go too far below 4000 at this resolution. I suggest you
do a few test encodes at various bitrates and see what you like. Video
quality is very subjective, and many digital broadcasts use bitrates as low
as 2500-3000kbit/sec for full 720x480, so do a few tests.. If you need much
more than 2 hours, 352 x 480 will start to look like a good idea, but you
should be able to get decent results with a bitrate as low as 3500kbit/sec
with 720 x 480.

Btw, do you know the difference between interlaced and progressive video?
That's very important as well to get a good result.

I hope at least some of this stuff made sense and that I didn't ramble too
badly. Let me know if you have any questions.

Archived from groups: rec.video.desktop (More info?)

> Okay, so how does one normally do it?
> Olushola

Tell me how long your video is and how big you need the file size to be.
Also, which version of TMPGenc are you using?

Archived from groups: rec.video.desktop (More info?)

Thanks for everyone help, I solved the problem

> > Okay, so how does one normally do it?
> > Olushola
>
> Tell me how long your video is and how big you need the file size to
be.
> Also, which version of TMPGenc are you using?
>
>