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  #1  
01-08-2006, 04:02 PM
Dreagon Dreagon is offline
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I encoded an AVI into m2v with CCE with a max bitrate of around 2000, but TMPGEnc DVD Author reads as 9800.
So when I tried combining it with the and audio file I stripped from the AVI using BeSweet which had a 128 bitrate it said it would be to high.
I tried it anyways, the audio worked just it was out of timing with the video.
So does this need to be fixed in CCE settings or my DVD Author Settings?
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  #2  
01-08-2006, 04:56 PM
kwag kwag is offline
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Did you encode your audio at 48Khz

-kwag
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  #3  
01-08-2006, 06:29 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Dreagon
I encoded an AVI into m2v with CCE with a max bitrate of around 2000, but TMPGEnc DVD Author reads as 9800.
Often the apps do not report the actual highest value reached in the stream, but the MAX value that was setted for the encodind job.

(note: 2000 is very low for an actual reached max ! Are you sure you are not talking about the average ?)
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  #4  
01-08-2006, 07:59 PM
Dreagon Dreagon is offline
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Yes my Audio was in 48khz, my videos come out decent around 2000 Bitrate, the actual max was 2229.

After a quick test I found that the reason it made the video show up as 9800 bitrate on DVD author was becuase in CCE I chose MPEG2 for DVD which I guess made a force fib of saying it had 9800.

I didn't get to check if now my audio will come out normal, but I guess so ?

The only bad thing for me now is since I'm encoding in regular MPEG2, to make it DVD compliant I have to resize the source instead of how it put it on a black background MPEG2 for DVD mode, 3x Longer than it originally took..
Is there any way to uhmm Put in the background before or after encoding ? (something that would take less then 30 mins on a 23-30 min video)
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  #5  
01-09-2006, 03:35 PM
gamma gamma is offline
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A quick glimpse in your manual learns you the following:

Quote:
Bitrate limitation In the DVD standard, the maximum bitrate of
Video ES is limited to 9.8 Mbps. In the MPEG-2 VIDEO international
standard (ISO/IEC 13818-2), the size of an individual picture is
limited using the concept of “VBV (Video Buffering Verifier)”. In the
concept of VBV, a stream having a 9.8 Mbps bitrate can create GOP
which has a size equivalent to a maximum of 11 Mbps. This perfectly
conforms to the MPEG-2 VIDEO international standard (ISO/IEC
13818-2), but whether it conforms to the 9.8 Mbps restriction of DVD
depends on interpretation. If DVD compliant is selected, instantaneous
bitrate in GOP units is controlled to be a maximum of 9.8
Mbps. During VBR operation, 9.8 Mbps is always written to the sequence
header regardless the specified maximum bitrate. 9.8 Mbps is
the maximum bitrate allowed under the DVD standard. 9.8 Mbps is
used here because in the case of the VBV model in VBR, bit allocation
planning by the encoder becomes more flexible as the maximum bitrate
becomes higher, therefore higher image quality can be achieved.
So if you deselect the "dvd compliant" option, CCE won't write the bitrate of 9800 in the header.

What do you mean with the 3 times longer encode? Encoding the movie over a background? I don't understand, can you be more specific?
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  #6  
01-10-2006, 06:38 PM
Dreagon Dreagon is offline
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Thanks gamma that helped alot, made it clear just to choose CBR instead of VBR.

Dialhot you were right 2k Max bitrate was to low, hehe thats why the sound and video didnt get along.

To answer your questions :
When I did it the first way I thought to solve my problem my encoding time went from 15 mins to 45 mins, but now in CBR I got a cool 16-18min encoding time on 23-25 min videos.

About the background, I was referring to this:
Quote:
Outputs DVD compatible stream. If the resolution of the source file
(frame size and frame rate) does not match with DVD standard, it
will be automatically converted. If the frame size of a source is smaller
than DVD standard and Resize is not selected, the image will be put
on black background. If Resize is selected, the image will be stretched.
And if that was possible to be done seperately, but now it doesnt matter.

Also,
Reading around I saw that CCE was better for making MPEG2s but I see the same if not very close quality from when I was TMPGenc, the only difference being time and size. TMPGenc takes longer time but gets a produces the same quality as CCE does in a smaller size (for my source, 34.4k frames or 23mins 50-70mb Difference). Is this normal ? Is there a way to get the same results on CCE ?

but in all thanks for helping me fix my problem.
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  #7  
01-11-2006, 04:05 AM
gamma gamma is offline
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Quote:
Originally Posted by Dreagon
Thanks gamma that helped alot, made it clear just to choose CBR instead of VBR.
Wooow. DON'T do that, that wasn't what I said! Always use VBR, as it will dynamically adjusts the bitrate, and uses lower/higher rates for the scenes that needs it. Example: a 10 mins encoding with 3500 CBR is bigger and looks worse than a 10 mins VBR min 300 max 5000 rate. (if done correctly).

Quote:
Originally Posted by Dreagon
Dialhot you were right 2k Max bitrate was to low, hehe thats why the sound and video didnt get along.
Hmm, 2k max can't be the reason that your audio is out of sync. Your video stream just won't look good.

Quote:
Originally Posted by Dreagon
To answer your questions :
When I did it the first way I thought to solve my problem my encoding time went from 15 mins to 45 mins, but now in CBR I got a cool 16-18min encoding time on 23-25 min videos.

About the background, I was referring to this:
Quote:
Outputs DVD compatible stream. If the resolution of the source file
(frame size and frame rate) does not match with DVD standard, it
will be automatically converted. If the frame size of a source is smaller
than DVD standard and Resize is not selected, the image will be put
on black background. If Resize is selected, the image will be stretched.
And if that was possible to be done seperately, but now it doesnt matter.
Use a script with the resizing in it. Get your values from FitCD.

Quote:
Originally Posted by Dreagon
Also,
Reading around I saw that CCE was better for making MPEG2s but I see the same if not very close quality from when I was TMPGenc, the only difference being time and size. TMPGenc takes longer time but gets a produces the same quality as CCE does in a smaller size (for my source, 34.4k frames or 23mins 50-70mb Difference). Is this normal ? Is there a way to get the same results on CCE ?

but in all thanks for helping me fix my problem.
Use VBR

CCE is a very good mpeg2 encoder, which gives good quality. Especially in the higher bitrates it beats tmpgenc in speed and quality IMO.
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  #8  
01-14-2006, 06:48 AM
Dreagon Dreagon is offline
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Wow, Got it. Thank you very much.
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  #9  
01-14-2006, 11:18 AM
gamma gamma is offline
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Quote:
Originally Posted by Dreagon
Wow, Got it. Thank you very much.
Your welcome
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