David George
Mar 8, 2014, 5:00:46 PM3/8/14
to wattza...@googlegroups.com
-In a few occasions the screen became totally black and only after a few seconds it slowly recoverd the usual definition.
(this problem could be related to vlc player, but videos run smoothly on simple vlc player )
stand alone mode
-As I wrote in a previous email it would be nice to improve also the stand alone mode, which still has major problems.
In particular with hd videos, it practically does not advances, or very jerkily. Here tried a video from New Zeland
downloaded from rlv4you.dk.
The computer is a i7 4x2.9Ghz, 8gb ram, AMD Radeon HD 5670 512MB GDDR5 graphic card. The trainer is a Elite crono hydro mag, with five levels of resistance
(this problem could be related to vlc player, but videos run smoothly on simple vlc player )
stand alone mode
-As I wrote in a previous email it would be nice to improve also the stand alone mode, which still has major problems.
In particular with hd videos, it practically does not advances, or very jerkily. Here tried a video from New Zeland
downloaded from rlv4you.dk.
The computer is a i7 4x2.9Ghz, 8gb ram, AMD Radeon HD 5670 512MB GDDR5 graphic card. The trainer is a Elite crono hydro mag, with five levels of resistance
David George
Mar 8, 2014, 5:23:06 PM3/8/14
to wattza...@googlegroups.com
I think you are talking about the NZ Wanaka video? I downloaded this. It is 1280x720 format at 30 frames per second. I tried this on 3 systems:
A 6 core Athlon running Linux: No issues with playback in stand alone
A 6 year old desktop pc running windows XP: No issues with playback in stand alone and ANT mode.
A netbook with an atom class processor: This had the problems you described in stand alone mode. I didn't try ANT yet but will see.
The video is recorded from a bike. Contrary to what many people expect (I've already had contacts about this) bike recorded videos are not the best to deal with as they are rarely a constant speed and the home trainer rider will frequently be going faster than the person recording the video. This causes a lot of speed mismatches. The exception are videos following pro-riders around a circuit. A further problem is they are shaky and so will be less compressed which can mean high data rates for the same video dimensions.
Wattzap uses the Functional Threshold Power entered into the preferences as the basis for calculating rider speed. The current power will be a value between FTP and 0.5FTP depending on the slope gradient. This is combined with the indoor trainer's power curve to work out a virtual trainer speed and this is combined with rider weight and the slope gradient to calculate road speed.
The Tacx trainer doesn't care in too much detail about what indoor trainer you are on (apart from showing a resistance value based on slope) and makes a much simpler calculation when setting playback speed.
A 6 core Athlon running Linux: No issues with playback in stand alone
A 6 year old desktop pc running windows XP: No issues with playback in stand alone and ANT mode.
A netbook with an atom class processor: This had the problems you described in stand alone mode. I didn't try ANT yet but will see.
The video is recorded from a bike. Contrary to what many people expect (I've already had contacts about this) bike recorded videos are not the best to deal with as they are rarely a constant speed and the home trainer rider will frequently be going faster than the person recording the video. This causes a lot of speed mismatches. The exception are videos following pro-riders around a circuit. A further problem is they are shaky and so will be less compressed which can mean high data rates for the same video dimensions.
Wattzap uses the Functional Threshold Power entered into the preferences as the basis for calculating rider speed. The current power will be a value between FTP and 0.5FTP depending on the slope gradient. This is combined with the indoor trainer's power curve to work out a virtual trainer speed and this is combined with rider weight and the slope gradient to calculate road speed.
The Tacx trainer doesn't care in too much detail about what indoor trainer you are on (apart from showing a resistance value based on slope) and makes a much simpler calculation when setting playback speed.
David George
Mar 22, 2014, 10:51:53 AM3/22/14
to wattza...@googlegroups.com
I've now tested this video on a netbook with an AMD C60 processor which is pretty low powered and it runs the video ok
http://www.notebookcheck.net/AMD-C-60-Notebook-Processor.51806.0.html
http://www.notebookcheck.net/AMD-C-60-Notebook-Processor.51806.0.html
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