Thread: VirtualDub2
View Single Post
Old 8th November 2017, 22:40   #348  |  Link
Emulgator
Big Bit Savings Now !
 
Emulgator's Avatar
 
Join Date: Feb 2007
Location: close to the wall
Posts: 1,531
WinXP32SP3: I tested 23 VD 32 bit versions from 35491 to 40538.
All do work properly and preview that 854x480 pixel .mp4 source without skewing.

Back to the infamous Win7U64SP1 system:
With almost all 32 bit VD versions (20 of 23) the testfile triggered that preview-skewing-while-focus by 2 pixels per line
Only the three VD32 versions that throw the missing svml_dispmd.dll fault were exempt from that behaviour:
37277, 37285 and 37341.
(37341 under WinXP32SP3 showed a nice artistic layered memory delay effect when scrubbing through timeline.)

While trying other sources it became obvious that only .mp4 sources that have a width not divisible by 4
would trigger that preview-skewing-while-focus by 2 pixels per line on that particular system in VD.
(854 width :4 = 213,5 This yields 2 pixels overflow)
(630 width :4 = 157,5 This yields 2 pixels overflow)

.mp4 sources with width divisible by 4 do preview-while-focus/play without skewing.

[Your hint regarding overlay seems to hit the nail. There is definitely something going on like this.
Sometimes on focus changes the screen is built up new for a split second.
For instance starting and closing TotalMediaTheatre5 leaves me with a desktop and windows changed.
All occurrences of Tahoma fonts replaced by the Win7 Standard font SegoeUI.]

Soon I will try on a different Win7U64SP1.

shekh: Many thanks for your PM in Russian !
While this is not my native tongue, I only seem to remember some phrases from school,
not sufficient for our technical conversation. But I used Google Translator with good success.
__________________
"To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain)
"Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..."

Last edited by Emulgator; 8th November 2017 at 23:05.
Emulgator is offline   Reply With Quote