bcj.

Cheers,
J

Thanks for taking the time to provide such a detailed response. I’m going to give your updated workflow a try. I’m beginning to think everyone has some level of color shift, but just doesn’t focus on it or worry about it much. It’s too noticeable for my personal taste thus far.

bcj.

I have experienced color shifting and luma shifting actually.. After much research and trial & error, I have come to believe that this stems from using codecs and rendering engines that work in differing color spaces.. RGB vs YUV.

If at any point in the workflow one of these is different, it will result in a color shift [or luma] because of the conversion that occurs, sort of like when changing from CMYK to RGB in print I suppose.. the results are never perfect.

With the workflow I use now, I do not have any issues with color/luma shifts, the only issue I have is a known bug within premiere that occurs when a clip is time remapped and output to quicktime [any codec I think]. Any clip remapped will appear fine within the preview but upon render will go dark [approx 20%]. I get around this by using dynamic link to AE [right click the clip and "replace with after effects comp"].

I have updated my workflow again from the original post, but I think it’s mostly covered in the comment I followed up with.. I will summarize here quickly:

1. download from 5D mark ii
2. make selections in bridge for clips that will go into production [reduces rendering of garbage clips]
3. create “raw” and “proxy” folders
4. dump the selections into the “raw” folder
5. using adobe media encoder I have a preset for proxies quicktime 1/9th resolution [640x360] – photo-jpeg 70% quality 30fps, PAR 1.0 [these render to "proxy" folder]
6. go to sleep
7. wake up and add the proxy files to the premiere project
8. do editing and “make offline” then “relink” when time to render.

Thats it..

Make sure that your project settings for video previews matches the codec that you use for the proxies.. in my case photo-jpeg.

Another note, after so much research I have gone with photo-jpeg as my “holy grail” codec.. from what I know this codec when quality is set @ 100% is 4:4:4 [nearly lossless] and when below 75% is 4:2:2, this makes for a strong intermediate transcode [100%] and also a good proxy [<70%]. Photo-Jpeg is also a good balance of size vs. quality [especially below 75%, I use H264 for "final generation" deliverables]

I have never used NeoScene but the same principles apply I’m sure, I also heard that final cut’s engine works in YUV..

Let me know if these tips help, my next project will have a video tutorial so I can share this a little more “dynamically”.

Cheers,
Frost

I’ve been using a proxy editing workflow over the past year with decent success. However, the thing that has baffled me the most is the color shift that occurs when, 1. I load the “raw” video file directly from the 5DmkII into Premiere Pro, and 2. when I transcode the footage with any codec escept Cineform’s NeoScene for Mac.

Have you experienced any color shifting in your workflow? And if so, have you cared? And if so, how have you handled it?

Today I followed your suggestions above by transcoding from the 5DmkII using both MPEG Streamclip/AIC and Quicktime/AIC, each output of which had a different result, and neither of which matched the original file. I am baffled!

My workflow is documented here (although it is in need of some minor updates):

http://bcjphotography.com/blog/allthatglitters/refined-video-process/

Thanks for your time,

bcj.

Thanks for checking out the blog,
Justin

S

I used you workflow to edit and it worked a treat, so huge thanks! However I now am struggling to export the footage. Now I don’t really understand what all of these settings mean (pixel aspect ration, anamophic…) but the footage all looks great when rendered out at low res. Now, I need to export it as uncompressed so I can bring it into Adobe After Effects to add some titles etc. the problem is that I can’t get the uncompressed export to work, it seems to make the footage almost metallic looking. I’ve tried messing around with many options but I just can’t find the best solution. The only really way I can export it and it looks ok is by using the h.624 format but this makes my cross dissolves look really pixilated. So, any ideas for ways to make this work?

Ta

S

Cheers,
J