I have a question the I hope someone can answer. I'm working on a 3 channel video installation right now, and I need to check the soundness of my workflow.
I'm editing in a custom sized sequence - 768 x 1440, square pixels, upper field, prores 422
This size is because we have 3 screens - two 4:3 screens and one 4:1.5 screen, which are synched with each other and flow from top to bottom, etc.
Most of the original footage that I'm bringing into the sequence is 1920 x 1080, and there is some archival footage in various formats and some stills every once in a while.
The advantage of bringing the high resolution footage into a standard def sequence is that we can then manipulate the image (scaling for example) without huge quality loss. (this is probably the only good reason) - plus the screens that we use are 4:3.
Ultimately after editing in this 1440 x 768 sequence, we have to divide the footage into the three screens. In order to avoid having to re-align every clip manually when cutting and pasting the clips from the 1440 sequence, what i've done is render out a 768 x 1440 clip with the sequence settings, and then import that clip into a sequence with the exact same settings, except it's 768 x 576, to achieve a 4:3 image. I then render this out again to a quicktime file with the same sequence settings.
My question is: have i somehow lost quality through this two step process to achieve the final video?
I think i haven't, but maybe my thinking is wrong.