Quantcast Mencoder: Mncsamplepreview - a New Tool. - Page 3 - digitalFAQ.com Forums [Archives]
  #41  
06-07-2004, 06:06 AM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Koekies
What I meant is that the samples are small parts of the movie and your tool aply's the average bitrate in the whole movie
to a small part of the movie but in the fully encoded 2 pass movie the bitrate of your small part isn't the same as the
average bitrate of that part in the fully encoded 2 pass movie.
So there fore you wouldn't really see how the bitrate would be spread over the movie after a 2 pass encode and what
the quality would be. Do you get my point now?
You can take so many chunks as you want until reach movie time in minutes. If you want those chunks takes other time that 1 second (I will add it to the interface soon), you can change following parameter in bat file:
Code:
 -endpos 1
1 means 1 second. You can put there 2, 3, 4, 5 or what you want. Chunks will be of this time.
Could it help you?


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  #42  
06-07-2004, 03:58 PM
vmesquita vmesquita is offline
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Quote:
Originally Posted by Dialhot
And what do you do if you sample don't go other 1500 but you have birate peaks above 10.000 in the whole movie ? Hugh ... ?
You're right. It won't reflect the full encode reality, because many 10.000 peaks will ruin the estimation if your target is max 2500. It makes more sense to encode the sample at the average (with max bitrate specified) and check the average quantisizer using BitRateViewer.

Quote:
Note: which tool do you use to calculate the average ? A simple calc or something else ?
MEncodeMe calcs the average, but when I need to do it myself I use dvdrhelp java calculator. But I confess I never took the time to test many calculator.
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  #43  
06-07-2004, 04:55 PM
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Quote:
Originally Posted by vmesquita
But I confess I never took the time to test many calculator.
Lol. I was talking about the avg bitate of you encoded m2v. Calculating the avg birate needs only a regular calc. It's just the number of bits of the file divided by the number of seconds.

No need to test any tool for that
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  #44  
06-07-2004, 06:00 PM
vmesquita vmesquita is offline
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For that I use the latest and greatest Windows Calc.exe.
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  #45  
06-07-2004, 06:33 PM
Prodater64 Prodater64 is offline
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Updated 07/JUN/2004: Fixed bad order of chunks when rebuilding m2v final stream.
Updated 08/JUN/2004: Efficiency improved.
Added chunk time selection.
Added reset and new sample encode.

__________________________________________________ _

Look at first post.


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  #46  
06-10-2004, 08:00 PM
Prodater64 Prodater64 is offline
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@Dialhot and all: Do you think that with this script, previewing will show us always same behaviour. It is to say, always will be worse than whole encode or better than it?
Do you think that this script can't help us with tunning of differents options, even when it don't be as final encode, you can see if images are sharper or not, etc.?


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  #47  
06-11-2004, 04:17 AM
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Quote:
Originally Posted by Prodater64
@Dialhot and all: Do you think that with this script, previewing will show us always same behaviour. It is to say, always will be worse than whole encode or better than it?
Will the cherry you taste have a better or a worse taste than the average cherry of the whole tree ? It's unpredictable

I think you understood this image (cherry and soup) I tried to give but it seems you didn't

Quote:
Do you think that this script can't help us with tunning of differents options, even when it don't be as final encode, you can see if images are sharper or not, etc.?
It can help to tweak things like denoise and sharpen yes. But you can do that either in starting mencoder and pres "CTRL+C" when it has already done 2 minutes of video
(or even better, you can look at the video with vlc while mencoder is still encoding it).
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  #48  
06-11-2004, 04:39 AM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dialhot
...
I think you understood this image (cherry and soup) I tried to give but it seems you didn't
I was so much angered like reading it kindly. I will read it again.

Quote:
Originally Posted by Dialhot
Quote:
Originally Posted by Prodater64
Do you think that this script can't help us with tunning of differents options, even when it don't be as final encode, you can see if images are sharper or not, etc.?
It can help to tweak things like denoise and sharpen yes. But you can do that either in starting mencoder and pres "CTRL+C" when it has already done 2 minutes of video
(or even better, you can look at the video with vlc while mencoder is still encoding it).
But if we want to see a problematic part (water, fog, fire, etc), can we set mencoder executable line with -ss xx:yy:zz -endpos "problematic part time"?
If you use the "CTRL+C" way, only can see the few minutes of your movie, but most important, you need to encode first pass completely.
Same with vlc.

Edited:
If you anytime did something like you say ("CTRL+C" or vlc ways), surely was over 1 pass encoding (as I did it sometimes). But this is like if we are gathering cherries from another cherry field (lower quality cherry field).
This do me think about if you are testing the script and viewing results or are you just talking from theoretical side? (It is just a question, no offense please, you said me once in the past that you always do your test, but I think that in this case maybe you don't)



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  #49  
06-11-2004, 05:18 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Prodater64
But if we want to see a problematic part (water, fog, fire, etc), can we set mencoder executable line with -ss xx:yy:zz -endpos "problematic part time"?
I think so but I never used this option and don't know what it does (it jump to a particular point in the video ?)

Quote:
you need to encode first pass completely.
NOT AT ALL
The sharpen and denoiser result is the same whatever the pass. The only diff between pass1 and pass2 is the bitrate repartition, so you can trust the result of pass1 for anything that not concerns blocks/pixeliszation of the frame.
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  #50  
06-11-2004, 05:38 AM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dialhot
Quote:
Originally Posted by Prodater64
But if we want to see a problematic part (water, fog, fire, etc), can we set mencoder executable line with -ss xx:yy:zz -endpos "problematic part time"?
I think so but I never used this option and don't know what it does (it jump to a particular point in the video ?)
Yes begin in -ss time and run until -endpos time.

Quote:
Quote:
you need to encode first pass completely.
NOT AT ALL
The sharpen and denoiser result is the same whatever the pass. The only diff between pass1 and pass2 is the bitrate repartition, so you can trust the result of pass1 for anything that not concerns blocks/pixeliszation of the frame.
I don't knew that.
Could you, please, to enumerate filters that would be possible test with this script? (mencoder and avs)
Thanks.


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  #51  
06-11-2004, 07:03 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Prodater64
Could you, please, to enumerate filters that would be possible test with this script? (mencoder and avs)
Keep you pencil and start taking notes :

ALL

You can drop the pencil and relax

All was said in my previous post in fact : you can test anything that does not deal with pixelisation. DO you know a filter that deal with that ? No.
Only the min/max bitrate are involved in this matter.
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  #52  
06-11-2004, 12:30 PM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dialhot
...
Keep you pencil and start taking notes :

ALL

You can drop the pencil and relax

All was said in my previous post in fact : you can test anything that does not deal with pixelisation. DO you know a filter that deal with that ? No.
Only the min/max bitrate are involved in this matter.
Does it mean that the script it is usefull for filter testing purposes, in your opinion, in spite of everything?


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  #53  
06-11-2004, 01:12 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Prodater64
in your opinion, in spite of everything?
No it is not because :
1/ as I told you you can test a script simply by interruptiong mencoder after the first minute or two of encoding

2/ as you told me you can want to see a particular scene and go directly to it by using the option you pointed.

Using you script will take much longer than 1) and won't satisfy the needs in 2).

So... still useless. Sorry
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  #54  
06-12-2004, 09:41 AM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dialhot
No it is not because :
1/ as I told you you can test a script simply by interruptiong mencoder after the first minute or two of encoding

2/ as you told me you can want to see a particular scene and go directly to it by using the option you pointed.

Using you script will take much longer than 1) and won't satisfy the needs in 2).
So... still useless. Sorry
Your stubborness stimulates my mind. Now you can codify a sample, only of the wished part. (Updated, look at first page)


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  #55  
06-12-2004, 09:43 AM
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Updated 12/JUN/2004: Added "preview only one chunk" (from a desired beginning time, during a given time.)

Look at first post.


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  #56  
06-12-2004, 12:43 PM
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Quote:
Originally Posted by Prodater64
Now you can codify a sample, only of the wished part. (Updated, look at first page)
That becomes to be an interesting thing
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  #57  
06-12-2004, 01:03 PM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dialhot
That becomes to be an interesting thing
And you become more pleasant.

BTW: I beg your perdon for that words that you will never forget.



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  #58  
06-14-2004, 11:58 AM
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Sorry Pro
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  #59  
06-14-2004, 12:05 PM
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Send a message via ICQ to incredible
This Thread has become splitted as It went totally out of its purpose/topic.

The further "colorproblem" posts can be found here so Prodaters Thread is "cleaned up" now :
http://www.kvcd.net/forum/viewtopic.php?p=84950#84950

Greets Inc.
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