QPSNR - a quick tool to compute psnr and ssim

[Emanem_]

Hello everyone,

recently I started coding a tool to quickly compute the PSNR and/or SSIM of multiple video streams, to objectively measure differences between codecs/settings.
Well, enough said, it's released under the GPL v3, you can find everything here:
http://qpsnr.youlink.org
You'll find a brief description and the packages/sources!
Let me know what you think!

Cheers,

[b66pak]

thanks...
_

[Emanem_]

Let me know what you think mate! :-)
Cheers! ;-)

[Keiyakusha]

This is commandline-only linux-only tool?

[Emanem_]

This is commandline-only linux-only tool?
Actually yes, it's command line only because it outputs on std::cout a CSV format, so you can then load it in excel and do all cool charts with it.
I use Ubuntu plus I always thought that for win there are other (maybe even better) tools!?

The fact is I decided to use command line (instead of, as example, GTK libraries - those do exist for win as well) is because imho there's no point in doing a GUI for a simple analyser like this...plus is easier to launch via command line.

I mean, all you have to do is specify videos and analyse it.
Actually you just redirect the output on a file (eg > output.csv) and you're done.
Then you open the CSV file with OpenOffice.org (or Excel) and you create all nifty good looking charts.
But you know, the important thing in a software like this is:
- execute it quick
- able to execute batches
- software itself be fast (and I can assure you that limits for this one are simply the disk latency and cores, because it'll use every resource available*)
- get results (raw data) in the most compatible format
Simple! ;-)

Cheers,

Ps. On win aren't there fast free opensource PSNR/SSIM analysers?

*Just think that potentially comparing a reference vs 1 only video could use 100% of a 4 core CPU...but this is explained in detail on the webpage...

[EEdcom]

Hi,

I got this kind of error: qpsnr: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by qpsnr)

[Emanem_]

Hi mate, I've compiled the 32 and 64 bit for Ubuntu 9.10.
Apparently you have an old gcc/g++ library.
Which version are you using?

In any case you can recompile it pretty easily:

sudo apt-get install g++ libavcodec-dev wget
mkdir qpsnr
cd qpsnr
wget http://qpsnr.youlink.org/data/qpsnr_0.2.1.tar.bz2
bunzip2 qpsnr_0.2.1.tar.bz2
tar -xvf qpsnr_0.2.1.tar
make -j2

and you'll have the compiled qpsnr under that directory! :-)
This is the beauty of open source! ;-)

In any case if you want to drop me a line, email address is at the end of webpage:
http://qpsnr.youlink.org/

Cheers! :-)

[EEdcom]

Hi,

Still something is wrong: http://pastebin.com/UJU0HGGd

Any ideas?

[EEdcom]

My gcc/g++ version is 4.3.3. I didn't notice that package was compiled for 9.10. (I have 9.04) Sorry my mistake. Still any way get this program working?

[Emanem_]

I guess you have to compile it yourself because I don't have any (even virtual) 9.04 around.
Really it's a breeze to do in Ubuntu (I've developed for years on win32 and Linux and actually installing/removing all the tools needed to build the executable is actually really easier on Ubuntu).
Anyway, follow the instructions above, line by line, and everything should be working.

I think the error you reported is due to the fact you haven't installed

sudo apt get install libavcodec-dev

Try to install that and then you should be able to compile (the errors you posted

src/qav.h:26:34: error: libavformat/avformat.h: No such file or directory
src/qav.h:27:32: error: libswscale/swscale.h: No such file or directory

are a clear indication that libavcodec-dev probably is not installed).

Cheers,

[Emanem_]

In case, try to install

sudo apt-get install libswscale-dev libavformat-dev

This should definitely make it.
Cheers,