This IS the Avid L2: Re: [Avid-L2] Is there a quality loss with a straight-import-then-export?

Hi Mike,
With FCP7, if you import ProRes, edit it in a sequence which is set up as the same flavour of ProRes (so no render bar in the timeline) and then export using the sequence settings, the ProRes will simply be 'passed-through', i.e. no-re-encoding. It's essentially just a file copy, and the export should be very fast for that reason.

Did you see any artifacts in the export? Are you sure that no-one re-encoded your export for the screening?

On 24 November 2015 at 05:59, mikejshen@gmail.com [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

Hi all,

I recently exported a show for an internal screening. We're working in FCP 7, editing in ProRes 422. To save time making this export, I imported a previous export (same specs, 1920x1080 ProRes 422 23.976), stitched in a few new sections, and then exported.

People at the screening complained about visual artifacts and I wondered if my import/export method introduced them.

Would my method result in any quality loss? I didn't add any color corrections or effects to the "old export" sections of the film. I've never been clear about whether this kind of straight import-export method results in quality loss (even if minor), since it is a "lossy" codec.

I know this is FCP-related but people on this forum are so knowledgeable about codecs, etc, that I thought I'd post it here. Thanks in advance.

Best
Mike