logo

Live Production Software Forums

www.vmix.com

Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
Aliasing Problem
Options
Go to last post Go to first unread
Previous Topic Next Topic
freenefilim  
#1 Posted : Sunday, January 15, 2012 5:38:17 PM(UTC)
freenefilim

Rank: Newbie

Groups: Registered
Joined: 1/15/2012(UTC)
Posts: 7
Location: Paris
hello and thanks for this powerfull software, I am testing it for the moment in demo mode since one week and I found an Important problem :

my system :

computer : I7 windows seven 64bits 12go ram.
2 Sdi declink card
1 intensity
2 camera Sony Ex1 xdcam (I use the sdi-hd and sd output to the declink cards)


I did many test with this system and all works fine. But when I record (Mpg2/8Mb) I found like aliasing in the result. so I did many test in hd and sd (50i/25p/50p), mpeg or Avi, with my two Sony cameras the aliasing artefact is always here, some capture images :


recorded with Vmix http://www.actionimagepr...iane/aliasing%20Vmix.jpg
zoom in the artefact http://www.actionimagepr...iasing%20Vmix%20Zoom.jpg
more aliasing in multiview http://www.actionimagepr...Sofiane/aliasing%20multi

recorded with the camera no aliasing http://www.actionimagepr...cord%20no%20aliasing.jpg


-So, this is my problem.
Back to top

Wanna join the discussion?! Login to your vMix Forums forum account, or Register a new forum account.
Back to top  
admin  
#2 Posted : Monday, January 16, 2012 12:03:24 AM(UTC)
admin

Rank: Administration

Groups: Administrators
Joined: 1/13/2010(UTC)
Posts: 5,208
Man
Location: Gold Coast, Australia

Was thanked: 4286 time(s) in 1520 post(s)
Hi,

There are three different resolution options in vMix, can you check they are all the same?

1. The resolution in Settings
2. The resolution of the Camera
3. The resolution of the Recording

Make sure they all match the resolution you have set for the camera and try recording to Mpeg2 with the highest bitrate (50Mb)

Also, what graphics card are you using?

Thanks,

martin
vMix
Back to top
WWW BLOG
admin  
#3 Posted : Monday, January 16, 2012 12:20:26 AM(UTC)
admin

Rank: Administration

Groups: Administrators
Joined: 1/13/2010(UTC)
Posts: 5,208
Man
Location: Gold Coast, Australia

Was thanked: 4286 time(s) in 1520 post(s)
Hi,

There appears to be a quality issue when recording to a different resolution than the output.
This will be fixed in the next release, but in the mean time if you will be recording to 1280x720 make sure the Output Size in settings is also set to 1280x720.

Regards,

Martin
vMix
Back to top
WWW BLOG
freenefilim  
#4 Posted : Monday, January 16, 2012 8:52:44 AM(UTC)
freenefilim

Rank: Newbie

Groups: Registered
Joined: 1/15/2012(UTC)
Posts: 7
Location: Paris
Hi Martin and thanks for the answer,

my graphic card Geforce 9600Gt.

-I did the test at 720p50 and I record at 50mB ok it's working (I did it also at 25mB because is better for blueray, but I thing you know it aliasing appears)
also, I noticed in the preview screen, inputs, on air screen of Vmix, I can see the aliasing (settings, camera at 720):

http://www.actionimagepr...Capture%20vmix%20720.PNG

http://www.actionimagepr...ltiview%20vmix%20720.PNG

http://www.actionimagepr...ane/Capture%20inputs.PNG

thanks
Sofiane
Back to top
admin  
#5 Posted : Monday, January 16, 2012 10:12:52 AM(UTC)
admin

Rank: Administration

Groups: Administrators
Joined: 1/13/2010(UTC)
Posts: 5,208
Man
Location: Gold Coast, Australia

Was thanked: 4286 time(s) in 1520 post(s)
Hi,

A small amount of aliasing in the previews is to be expected as vMix prioritises the high quality rendering for the video output.

If you set the output size in settings to 1280x720 and the recording to 1280x720 the aliasing in the recording will be gone.
(You will need to restart vMix after changing the settings)

Regards,

Martin
vMix
Back to top
WWW BLOG
freenefilim  
#6 Posted : Monday, January 16, 2012 11:50:34 AM(UTC)
freenefilim

Rank: Newbie

Groups: Registered
Joined: 1/15/2012(UTC)
Posts: 7
Location: Paris
Hi Martin,

-you said "A small amount of aliasing in the previews is to be expected as vMix prioritises the high quality rendering for the video output". ok why not :) ...
-I agree at 1280x720 recorded at 50mb there is no aliasing But, The thing was interesting for me in Vmix is to record SD pal mpeg2 then burn it to dvd just after mixing (conference for exemple) ..the 720p 50mb will take lot of time to burn DVD and in the same time using the external output with hd recorder (ex : atamos ninja, samourai).

So I will wait for the next release.

Beyond that, Vmix is in my top list, including great features.
by the way some suggestions for the future releases :

-dockable windows on the main Vmix windows for the audio mixer, shortcuts pad..etc.
-possiblity to use an external controller with the shortcuts for exemple :

http://www.thomann.de/fr/novation_launchpad.htm
http://www.thomann.de/fr...0006f0c7758e883882efd665

-direct access in main window to zoom, wipe, slide transition. (button for each)


thanks again,
Sofiane
Back to top
Users browsing this topic
Guest
Similar Topics
Antialiasing Problems ! (General Discussion)
by Slaver 2/24/2016 9:57:19 AM(UTC)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Privacy Policy | Powered by YAF.NET | YAF.NET © 2003-2024, Yet Another Forum.NET
This page was generated in 0.125 seconds.