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Old 03-11-2008, 02:35 PM   #1
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Join Date: Jan 2008
Location: Aberdeen
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Default HD to SD Downconvert via Edius, VirtualDub & Procoder Procedure - Perfect results

This procedure is only necessary for certain full HD cameras with high detail such as the Sony EX1/EX3 and similar. Also, is only necessary for footage with fine detail. Early generation HDV cameras such as the Sony Z1 or eg. footage of people against soft backgrounds that doesnt have fine patterns or diagonal lines will output to SD without noticeable flickering with Edius/Procoder built in scaler.

The purpose of this procedure is to get HD out of Edius, scale it down to SD without introducing scaling artefacts, flickering or zebra like patterns as found going direct from Edius to Procoder. Testing concludes the "resize" filter built into Virtualdub solves all scaling issues.

Unfortunately it is not too user friendly to install and get frameserving working for the first time. In the process of much web searching, investigation and testing, I have compiled a long procedure so I can repeat in the future which I share here. The procedure is less complex to repeat after everything has been installed and the first encode has been done successfully so dont be put off.

Revised 29/05/10 - If using Vista or Windows 7, Vfapi readAVS needs this workaroud to install:-
1. Open a command promt with administrative rights (type cmd in the start menu and hit Ctrl+Shift+Enter).
2. Navigate to the %SystemRoot%\SysWOW64 folder. (should be c:\windows\SysWOW64
3. Type rundll32.exe advpack.dll,LaunchINFSection C:\Your_Path\vifp.inf,DefaultInstall and you're done.
4. Substitute C:\Your_Path with the path to your vfip.inf, but note that you can't use placeholders like "*" to shorten the folder names or you'll get an error message stating the inf could not be found...

When everything went right, you'll see the VFAPI Reader Codec in the virtualdub video compression menu.

Revised 29/05/10 - If using Vista 64 bit or Windows 7 64 bit, do not download the 64 bit version of Virtualdub (no 64 bit canopus codec - you will get errors importing canopus .av). The 32 bit version of Virtualdub works fine under 64 bit OS's and works with the 32 bit VFW codecs on the system

1. Export Edius HD timeline to Canopus HQ.avi (default standard settings are fine)
2. Download Virtualdub from
3. Extract zip file to C:\program files\virtualdub
4. Run auxsetup.exe and click on Install handler
5. Download from
6. Download ReadAVS from
7. Unzip both zip files to C:\program files\VFAPI
8. Go to that directory, right click vifp.inf and select install and double click vifpset.bat
9. In notepad, open and change ReadAvs.reg to this path "Avisynth"="C:\\Program Files\\VFAPI\\ReadAVS.dll"
10. Double click on ReadAvs.reg and allow the information to be added to the registry
11. Launch VirtualDub
12. Open video file – Open your CanopusHQ .avi file
13. Right click the video window to change view zoom to something smaller – 50% or so. This is the input window and should leave space to see the output video window to the right
14. Goto Video / Filters and Add Resize Filter, double click filter or select configure. Disable aspect ratio and change new size to 720 x 576 (PAL) or 720 x 480 (NTSC)
15. Default filter mode Precise bicubic (A=-0.75) is fine but very slow to render, try Lanczos3 (not much difference in quality but quicker to encode). Select Interlaced (very important to select the interlaced tick box)
16. File / Start Frame Server
17. The Framerserver name is not important – leave as it is and click Start
18. Enter a filename such as framerserve.vdr (make sure you type in .vdr)
19. Goto C:\Program Files\VFAPI and run VFAPIConvEN.exe
20. Add file – select the framerserve.vdr created above and click open
21. Change the output file location if you want, and click OK
22. Click Convert
23. frameserve_vdr_vfapi.avi should be created in the directory specified.
24. Launch Procoder or Procoder Express (Any version seems to work except Procoder 3.05 - see thread comments about black video. Earlier versions work fine. See post #31 - thanks to Barry)
25. Add video source frameserve_vdr_vfapi.avi
26. If interlacing defaults to Lower field first, change to Upper field first
27. Change the aspect ratio to 16:9 for widescreen
27b. Add a 709 to 601 color correction filter to the source
28. Add Target Preset – your usual MPEG-2 DVD preset or whatever output format you want

Voila! When complete, place the encoded file onto a SD Edius timline and view on an external monitor to check the results.

(Step 27b added to procedure - necessary)

After going through this procedure the first time, you can create desktop shortcuts to VirtualDub.exe and VFAPIConvEN.exe and keep the same paths and naming conventions - framerserve.vdr and frameserve_vdr_vfapi.avi overwriting the existing files from the previous time. The VirtualDub settings can be saved with “save processing settings”.

Let me know how you get on. Any comments or suggestions to tweak the procedure welcome.
Mark Stuart

Last edited by msvideo; 05-29-2010 at 09:20 PM. Reason: update
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