HDV Keying in AE
 

I capture HDV in AE at 1080 with green screen work. put files directly in to AE to key and FX my question is what is the best format compression to export to go back to Premiere? Uncompressed is great other than the file size.

Thanks
Tom

If you compress, ingest, compress and on and on you will generate loss in your video...

Its best to uncompress the footage and stay uncompressed until you are complete with
the editing, then compress upon final output...

Thats one of the advantages of using a intermediate like Cineform... there is no muti generation loss.....

ProRes, HDxNA, photojpeg at 90%+, PNG sequence

ANY time you recompress something there will be some loss unless its a lossless codec. even with a lossy codec, the loss is typically a few pixels here and there if your quality settings are high enough. nothing to worry about over even a few generations encodes.

After effects will crash if you try to import HDV footage on a lot of machines. Render from premiere to uncompressed before you go out to AFX.