[vdr] test material to evaluate image quality on TV set

Paul Menzel paulepanter at users.sourceforge.net
Sat Apr 25 01:26:48 CEST 2009


Am Freitag, den 24.04.2009, 18:05 +0200 schrieb Udo Richter:
> On 24.04.2009 17:11, Paul Menzel wrote:
> > I searched for all variants of
> > "test material" for ff-card or "full featured" tv set
> > vdr "test material"
> > on the WWW to no avail. I only found [1] which also voices this wish.
> 
> There's a test picture I've made for exactly the same purpose on my web 
> page:
> 
> http://www.udo-richter.de/vdr/testpic.html

Thanks a million, Udo!

> However, its not a ready-made mpg video, though there's an avisynth 
> script (windows only) that helps making one. And its a 4:3 only picture.

I searched a little on how to convert this on Debian GNU/Linux and the
repository [1]. I am not satisfied with the result yet, but if someone
else wants to try or knows about this here it is.

1. using mjpegtools
# ppmtoy4m from mjpegtools, unfortunately it just take ppm files
convert testpic.png testpic.ppm
ppmtoy4m -F 50:1 -A 59:54 -I t -L -n 1000 -r testpic.ppm > output.y4m
# there are a lot of artifacts

2. using mplayer

I just found [2] but I did not find an option to specify to only take
this one file/image.


Thanks,

Paul


[1] http://debian-multimedia.org/
[2] http://web.njit.edu/all_topics/Prog_Lang_Docs/html/mplayer/encoding.html
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