Quantcast FFmpeg: FFvfw Settings to Create KDVDs and KVCDs - Page 3 - digitalFAQ.com Forums [Archives]
  #41  
02-04-2004, 11:05 AM
Jellygoose Jellygoose is offline
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I gotta problem here.

Just viewed my first full encode in bitrate viewer. Q-Curve is a straight line, average is exactly 2.0 and that's great. But...

I got Bitrate Peaks of 14.363kb/sec
I'm pretty sure that my DVD Player won't play these scenes am I right? How can I make the encoder to stay under 8000kb/sec at the peaks.
But damn the movie looks great...

EDIT: In fact I see now the bitrate also drops under 300kb/sec in some scenes.
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  #42  
02-04-2004, 11:52 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Jellygoose
I got Bitrate Peaks of 14.363kb/sec
We have a new record there

Quote:
I'm pretty sure that my DVD Player won't play these scenes am I right?
I think you're right.

Quote:
How can I make the encoder to stay under 8000kb/sec at the peaks.
EDIT: In fact I see now the bitrate also drops under 300kb/sec in some scenes.
The min/max bitrate setting is one of the issue Kwag asked to Milan, but didn't have receive an answer yet.
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  #43  
02-04-2004, 12:08 PM
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Quote:
Originally Posted by Jellygoose
How can I make the encoder to stay under 8000kb/sec at the peaks.
We need to write a "Bitrate Clipper/Trimmer" utility

-kwag
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  #44  
02-04-2004, 12:33 PM
Jellygoose Jellygoose is offline
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I'm actually trying to use the Blur-Part of the MA script for this.
(thanks inc!)
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  #45  
02-04-2004, 04:49 PM
Prodater64 Prodater64 is offline
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Hello: Excuse me, why cbr. I don't find out nothing in the other thread. (I think I'm a Poor english team member too)
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  #46  
02-04-2004, 04:56 PM
Krassi Krassi is offline
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Quote:
Originally Posted by Prodater64
Hello: Excuse me, why cbr. I don't find out nothing in the other thread. (I think I'm a Poor english team member too)
Because CBR with with codec is actually VBR. If you have a look at the screenshots from bitrate viewer in the other thread you can see that the bitrate varies alot, it isn't constant
With CBR, we are able to adjust the Buffer Size and the final size easier and the quality is higher due to higher bitrate variation.
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  #47  
02-05-2004, 06:57 PM
rds_correia rds_correia is offline
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ehr,Guys?
My Q curve still looks like a sawblade...
Could someone help me with it?
My settings match Kwag's at the begining of this sticky.
I'm running ffvfw from 2004.
Thanks
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  #48  
02-06-2004, 03:38 AM
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What means sawblade? I clear interval of zig-zag or just arbitary up'n downs?

(pic maybe?)
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  #49  
02-06-2004, 04:02 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by incredible
What means sawblade? I clear interval of zig-zag or just arbitary up'n downs?
More "moutain landscape" than "regular zigzag" nor "heartbeat".

You see the yellow line il all your posts ? The green one is like that !
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  #50  
02-06-2004, 04:56 AM
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Phil, did you try once to change EVERY quantizer to the same value like

min: I =2 , P=2, B=2
max: I= 2, P=2, B=2

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  #51  
02-06-2004, 05:12 AM
Dialhot Dialhot is offline
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What do you think ?

I even changed the "macroblock" part (the one that is greyed by default).

By the way it's not very a problem because when I set min=max=2 for instance, the value is always UNDER 2 and never OVER. So the minimal quality I ask is never bypassed.
But as I told, this behaviour mask a serious problem in the codec that we have to solve if we want to continue to share our experience on this.
What is the value of comparisons between Kwag results and mine if the behaviour of the codec is completly different on its PC and mine ?

Beacause I repeat : I NEVER HAD a constant Q curve like you have.

Note : ASAP I will DL the common sources proposed in an other thread to see if I can reach the same results a yours or Kwag's on the same video.
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  #52  
02-06-2004, 05:30 AM
incredible incredible is offline
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Quote:
Originally Posted by Dialhot
By the way it's not very a problem because when I set min=max=2 for instance, the value is always UNDER 2 and never OVER. So the minimal quality I ask is never bypassed.
But as I told, this behaviour mask a serious problem in the codec that we have to solve if we want to continue to share our experience on this.
I totally agree cause if for example the curve gets down on dark or plain scenes ..... thats the reason why blocks do come out on surfaces.
Do a try on a movie with underwaterscenes and watch on these scenes the bitrateviewer curve ... I think it will fall down.
Quote:
Note : ASAP I will DL the common sources proposed in an other thread to see if I can reach the same results a yours or Kwag's on the same video.
Watch my statements in there according to that workout sample "emotion.mpg", but thats only IMHO.
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  #53  
02-06-2004, 06:14 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by incredible
Watch my statements in there according to that workout sample "emotion.mpg", but thats only IMHO.
I don't want to use interlaced also. That's why I didn't DL this source as soon as I saw that, even before your first post about that
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  #54  
02-06-2004, 09:03 AM
Hydeus Hydeus is offline
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Quote:
Originally Posted by Dialhot
I even changed the "macroblock" part (the one that is greyed by default).
I've never touched this. I use default value and mine Q-Curve is flat. Try set it back to dafault, or reinstal ffvfw (it's only sugestion, i don't know is this will work).
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  #55  
02-06-2004, 10:01 AM
Dialhot Dialhot is offline
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I didn't mentioned but I have that on my 2 PCs and the second one didn't have any codec installed before.

BTW, I dropped for a while this codec, results are too poor comparing to the efforts and I don't have the time for the moment.
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  #56  
02-06-2004, 12:21 PM
digitall.doc digitall.doc is offline
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Quote:
Originally Posted by Dialhot
BTW, I dropped for a while this codec, results are too poor comparing to the efforts and I don't have the time for the moment.
...sad to here that, your help is very apreciated
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  #57  
02-06-2004, 02:56 PM
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I've a problem. Why can't I set in the field "Encoders" only Xvid & uncompressed?

How can I set it to MPG-2?
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  #58  
02-06-2004, 04:02 PM
rds_correia rds_correia is offline
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Quote:
Originally Posted by incredible
What means sawblade? I clear interval of zig-zag or just arbitary up'n downs?

(pic maybe?)
Would love to show you guys but I don't know how to post a pic...
I guess I need some web space but unfortunately I don't know where to get some. I mean free...
I must say that I already uninstalled both ffvfw and ffdshow and reinstalled both...
Same results.
Don't know what to do. I thought it would have somehow something to do with PAL sources.
But you don't experience this problem, do you Inc?
Cheers
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  #59  
02-06-2004, 04:25 PM
Encoder Master Encoder Master is offline
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Now I've installed the right ffvfw but I can't save a video. VDUB is in progress but the results are around 20kb and not playable what i've done wrong?
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  #60  
02-06-2004, 04:41 PM
Krassi Krassi is offline
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Quote:
Originally Posted by rds_correia
I thought it would have somehow something to do with PAL sources.
But you don't experience this problem, do you Inc?
Cheers
Hi rds_correia,
it has definitely nothing to do with PAL as we both haven't had this problem.
Have you tried different sources
Maybe your registry entrys got screwed up, but i recommended this also to Phil and he said that this appeared on his clean second pc.
Or maybe it's the bitrate viewer (as i don't trust it always)
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