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TOPIC: A (somewhat tedious) workflow for converting 4:2:0 to 4:2:2 with free tools

A (somewhat tedious) workflow for converting 4:2:0 to 4:2:2 with free tools 6 years ago #43802

  • jjsgt84
  • OFFLINE
  • Senior Boarder
  • Posts: 55
  • 6 years ago
I know there are better methods of converting 4:2:0 footage to 4:2:2, but this is the best free method that Ive found to convert, edit, and produce a final file in 4:2:2 for free. The differences are definitely noticeable when you zoom in and look at color rich areas. Any thoughts, suggestions, or improvements are welcome.


Requires:
- VirtualDub
...-- Need to download and install Matrox vfw codecs
......- http://www.matrox.com/video/en/support/windows/vfw_software_codecs/downloads/softwares/version1.0/
...-- May need to download and install ffinput drivers
......- http://code.google.com/p/ffinputdriver/downloads/list
...-- Need to download and install plugin to import .MOV files
......- http://www.tateu.net/software/
......- http://forums.steves-digicams.com/editors-photoshop-vegas-final-cut-pro-kdenlive-etc/172321-importing-mov-1080p-720p-hd-videos-eg-kodak-zi8-directly-v
- Lightworks Free

Steps:
Start with H.264 .MOV from Canon camera.
Convert to ProRes 444 (or HQ 422) in Eyeframe Converter (http://eyeframeconverter.wordpress.com).
I use VirtualDub to apply the NeatVideo filter at this point (amazing tool).
Export from VirtualDub as uncompressed YUYV AVI.
-- Should be possible at this point to re-use VirtualDub to save YUYV footage as Matrox I-Frame HD, but I get errors...
-- Should be possible at this point to use EyeFrame to convert YUYV footage as Matrox I-Frame for Lightworks Free with proxies. (* untested *)
-- Make your own proxies at this point if nothing else works.
Import proxies to Lightworks, build project (this keeps you from having to edit uncompressed files = laggy, but you can just work with the YUYVs if you want to skip the proxy steps).
Swap in uncompressed footage before exporting.
Export from lightworks as MPEG422@HL or uncompressed YUYV.
Last Edit: 6 years ago by jjsgt84.

Re: A (somewhat tedious) workflow for converting 4:2:0 to 4:2:2 with free tools 6 years ago #43804

  • fischerb
jjsgt84 wrote:
I know there are better methods of converting 4:2:0 footage to 4:2:2, but...


if you really want to do this kind of stuff, take a look at this:
rarevision.com/5dtorgb/

Re: A (somewhat tedious) workflow for converting 4:2:0 to 4:2:2 with free tools 6 years ago #43805

  • jjsgt84
  • OFFLINE
  • Senior Boarder
  • Posts: 55
  • 6 years ago
fischerb wrote:
jjsgt84 wrote:
I know there are better methods of converting 4:2:0 footage to 4:2:2, but...


if you really want to do this kind of stuff, take a look at this:
rarevision.com/5dtorgb/


I have that as well, but the Win x64 version is completely broken. The Win x86 version works, but colors my footage a bit and I dont like the color shift. But it is also a great program. You would still need to go through the whole workflow listed above to get it to work with Lightworks, although you can skip the first conversion to YUYV in VirtualDub since its already an uncompressed AVI. I cant remember for sure, but I think I had some problems importing the 5DtoRGB files into Lightworks.

Re: A (somewhat tedious) workflow for converting 4:2:0 to 4:2:2 with free tools 6 years ago #43809

  • fischerb
i just mention 5DtoRGB because it's a highly specialized tool to handle this 4:2:0 to 4:2:2 chroma upsampling and interpolation process in a very clever way. i don't use it myself, but all the reports about it look very impressive. could you compare the visual results of your suggested upsampling workflow with tests done on 5DtoRGB (e.g. rarevision.com/5dtorgb/comparison/)?

concerning the reasons for your color shift problem, you may find a lot of useful information in this thread:
www.personal-view.com/talks/discussion/530/5dtorgb-for-gh2-advantages-vs-disadvantages
Last Edit: 6 years ago by .
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