piLagTester PRO: new features

 I've added a few new features for version 2.0. Quickly:

  1. graph now has tick-marks every 10 ms.
  2. press P to save a screenshot 
  3. press 1 or 2 to change the scale of the graph
  4. press Q or W to + / - the input lag threshold (default=5%)
  5. press A or S to + / - the full response threshold (default=80%)
  6. Press D to toggle dynamic contrast compensation / diagnostic test (default=off). 
  7. command line options:
-a <frames>: automatically record then quit
-x don't save/make .datx file
-r don't save/make .datr file
-l <fname>: save averages here (default=log.txt)




Comments

Post a Comment

Email me

Name

Email *

Message *

Popular posts from this blog

Panasonic TH-42PX75U Plasma TV review: input lag and upscaling tested using the piLagTesterPRO

Image
This 720p Plasma TV from 2008 is very unique and quite nice in many ways. It used to retail for around $1300. If you can find one it's a great choice for retro gaming.  Overview/Image quality This is a plasma TV, which generally means at least the following: nearly infinite viewing angles, and jaw dropping weight. That's true in this case as well. This 42" model weights 75lbs.  At native resolution (720p) this TV crops 20 pixels off the top/bottom and 30 off the sides. 480p/i crops 20 pixels off all sides. Both modes have aliasing, too, though it's not too bad. There's really no excuse for aliasing on a TV this big: you know the panel was designed specifically to be a tv. Why not hit 720p exactly? And as for 480p/i, they could have at least offered a zoomed out mode with black borders and 1:1 pixel mapping. But no such luck. There are zoom/stretch options to crop even more, but none that crop less. While the native resolution supposedly is 1366 x 768 it does accept
Read more

piLagTester PRO order page

Image
The piLagTesterPRO measures your monitor's input lag and response time. It is a cheap, full featured add-on to the Raspberry Pi; I provide the sensor and required software, you provide the Pi (a $5 pi Zero is more than sufficient). Although it has a DIY aesthetic, it is quite functional and in fact offers quite a lot more features than the commercial alternatives (Leo Bodnar and the Time Sleuth), and has been tested with over 40 TVs, including 4k models .  Here's what it looks like in action: The pi draws a black background, and then roughly once a second displays a set of target rectangles (top/middle/bottom). You place the sensor over the desired target, and the piLagTester measures the monitor's response starting from the moment the frame of video data is sent over the Pi's HDMI port. This is plotted in the graph, which is sideways for space reasons. The lag tester measures two thresholds. In red it shows how long it takes for the monitor to start displaying t
Read more

Vizio VX20L HDTV review: input lag and upscaling tested using the piLagTesterPRO

This 720p TV from 2007 is rather mediocre, with variable input lag, aliasing, and in general very little to recommend it for gaming, retro or otherwise.  Image quality Good upscaling is critical for retro gaming. Ideally, all pixels should appear equally sharp and bright (no aliasing), and angled lines should appear smooth, with no jagged, irregular steps. Also important is that the display shows most or all of the pixels it is sent. Often, this is not the case, with some number of pixels cropped from the bottom or top edges. Shockingly, these tests are relevant for modern gaming as well, because even at their native resolution many TVs have aliasing and cropping. The set has no options to adjust cropping/scaling. At least not without the remote. 480i/p is displayed stretched to 16:9. resolution aliasing cropping (top, side) 480p/i  mild  20, 30 720p  bad  30, 40 1080p  mild  40, 60 Aliasing is quite bad at the tv's "native" resolution of 720p. 1080p actually looks better
Read more