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Old 23rd July 2008, 17:02   #1  |  Link
Sem
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Program to Compare Video Encode Quality

is they any program or anything i can use to do this?

thanks
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Old 23rd July 2008, 17:21   #2  |  Link
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try programming your eyes.
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Old 23rd July 2008, 17:33   #3  |  Link
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Quote:
Originally Posted by Sharktooth View Post
try programming your eyes.
I don't get it, where is the funny?

As per OP's question, Avisynth can let you stack frames from multiple videos and have them play back simultaneously in player like MPC. Check out the avisynth docs and sub-forum.
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Old 23rd July 2008, 17:38   #4  |  Link
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Quote:
Originally Posted by Sharktooth View Post
try programming your eyes.


EDIT: Cos I apparantly violated the rules (fair cop BTW, not complaining), I'll elaborate. Only your eyes can tell the difference between videos. Metric comparisons can only go so far, and in my experience are wholly unreliable.
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Last edited by Inventive Software; 24th July 2008 at 20:11.
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Old 23rd July 2008, 18:15   #5  |  Link
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The question is whether the OP wants a tool that helps the user to compare videos visually or a program that will do the comparison automatically/mathematically without the help of human eyes

Of course the latter is not possible for most purposes! And I think that is what Sharktooth meant...
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Old 23rd July 2008, 18:27   #6  |  Link
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@Sem

Hi!

I'd suggest to you that "video Quality" is a subjective concept "in the eye of the beholder", because different viewers have different likes and dislikes regarding video - e.g. some prefer a softer image, some a sharper image, some prefer brighter colors, while others prefer "mellower" colors...
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Old 23rd July 2008, 19:14   #7  |  Link
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for who didnt get it... read the title again. only EYES can compare quality...
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Old 23rd July 2008, 19:17   #8  |  Link
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Quote:
Originally Posted by Sharktooth View Post
for who didnt get it... read the title again. only EYES can compare quality...
Yes, but there are programs to that can help your eyes. Like inspecting the video frame-by-frame and switching between different versions/encodes easily...
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Old 23rd July 2008, 19:20   #9  |  Link
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he asked for a "Program to Compare Video Encode Quality"
it does NOT exist. there are program based on commonly used quality metrics, but we all know they are not good for REAL quality comparison.
Infact x264 psy-RDO is crap for those programs, while, in reality, it enhances the perceved quality a LOT.
Only the eyes are good...

Last edited by Sharktooth; 24th July 2008 at 03:06.
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Old 23rd July 2008, 19:32   #10  |  Link
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Quote:
Originally Posted by Sharktooth View Post
he asked for a "Program to Compare Video Encode Quality"
And that question is not clear....

"Program to Compare Video Encode Quality" might also refer to a tool that shows the same frame from different encodes side-by-side or alternating, so you can compare the encodes more easy
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Last edited by LoRd_MuldeR; 23rd July 2008 at 19:53.
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Old 23rd July 2008, 20:04   #11  |  Link
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he asked for something and not some other thing.
it's CLEAR he wants a PROGRAM that COMPARES QUALITY of different encodes... not a program that helps him to judge quality of different encodes. it doesnt exist. PERIOD.

Last edited by Sharktooth; 23rd July 2008 at 20:14.
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Old 23rd July 2008, 20:13   #12  |  Link
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Quote:
Originally Posted by Sharktooth View Post
he asked for something and not some other thing.
it's CLEAR he wants a PROGRAM that COMPARES QUALITY of different encodes... not a program that helps him to judje quality of different encodes.
IMHO that is not so clear. So we will have to wait for his answer...
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Old 23rd July 2008, 20:16   #13  |  Link
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if he was looking for something different he could have used different word or the search function and would have found avisynth...

Last edited by Sharktooth; 24th July 2008 at 03:06.
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Old 23rd July 2008, 20:50   #14  |  Link
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Quote:
Originally Posted by LoRd_MuldeR View Post
And that question is not clear....

"Program to Compare Video Encode Quality" might also refer to a tool that shows the same frame from different encodes side-by-side or alternating, so you can compare the encodes more easy
maybe i should have worded my post better but thats pretty much what i would like

but its ok now what i will do is make a copy of my mplayerc.exe somewhere and have players open playing at the same time and then compare the 2 encodes that way

thanks for all the reply's tho
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Old 23rd July 2008, 20:55   #15  |  Link
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Try this in Avisynth:

Code:
clip1 = DirectShowSource("C:\MyEncode1.foo", audio=false)
clip2 = DirectShowSource("C:\MyEncode2.foo", audio=false)

StackVertical(clip1,clip2)
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Last edited by LoRd_MuldeR; 23rd July 2008 at 20:58.
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Old 23rd July 2008, 21:02   #16  |  Link
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Thanks for the solution Mulder,

too bad some guys" Ego's increase with their postcount.
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Old 23rd July 2008, 21:05   #17  |  Link
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Quote:
Originally Posted by LoRd_MuldeR View Post
Try this in Avisynth:

Code:
clip1 = DirectShowSource("C:\MyEncode1.foo", audio=false)
clip2 = DirectShowSource("C:\MyEncode2.foo", audio=false)

StackVertical(clip1,clip2)
nice one that works brilliantly much better than having 2 instances of MPC open

i havent tried it yet with my 720p and higher encodes as i doubt i will have enough screen space

but for my dvd encodes this works fine

thanks again
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Old 23rd July 2008, 21:07   #18  |  Link
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Quote:
Originally Posted by Sem View Post
i havent tried it yet with my 720p and higher encodes as i doubt i will have enough screen space
If it doesn't fit on your screen, stack horizontal and use "extended desktop" on two screens
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Old 23rd July 2008, 21:43   #19  |  Link
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You could also try this tool here:
http://forum.doom9.org/showthread.php?t=138430

It lets you compare two videos in fullscreen switching between them with the left mouse button. For me it's easier than side by side comparing ala stackhorizontal/-vertical.
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Old 23rd July 2008, 21:49   #20  |  Link
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Quote:
Originally Posted by Zwitterion View Post
You could also try this tool here:
http://forum.doom9.org/showthread.php?t=138430

It lets you compare two videos in fullscreen switching between them with the left mouse button. For me it's easier than side by side comparing ala stackhorizontal/-vertical.
You could achieve that with Avisynth like this:
Code:
clip1 = DirectShowSource("C:\MyEncode1.foo", audio=false)
clip2 = DirectShowSource("C:\MyEncode2.foo", audio=false)

Interleave(clip1,clip2)
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