Does exporting a video twice from the same exact project/timeline cause quality loss?

[Celestia B.]

Hello. I have just exported a video from Premiere Pro that took me several weeks to make, and I noticed that a few areas exported a bit weirdly so I'd like to go back into my project/timeline, change those particular clips, and export the entire video again.

I normally export my videos at High Quality 2160p 4k, with a target bitrate of 120. I also normally export straight from Premiere Pro, rather than adding to the Media Encoder queue.

(NOTE: I am not putting my exported video into a new timeline to re-export. I am going back to my original project/timeline with all of the original clips and effects so that I can edit those particular clips that I need. I then plan to render it again from Premiere Pro.)

Thank you in advance for your assistance!

[Peru Bob · Accepted solution]

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@Celestia B. wrote:

 I'd like to go back into my project/timeline, change those particular clips, and export the entire video again.

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Exporting the same timeline as described doesn't decrease quality.

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@Celestia B. wrote:

(NOTE: I am not putting my exported video into a new timeline to re-export....)

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If you did as described above in parentheses, then it would affect quality.

[Celestia B.]

Thank you! Sorry, I know this must have seemed like a noob question, but you'd be surprised how I can't find any answers for this anywhere and I just wanted to make sure! Really, thank you!

[R Neil Haugen]

There's a lot of things that don't seem obvious to someone new to these complex apps. Like ... "importing" doesn't  actually move or copy media to a new location, it simply means that Premiere is importing the metadata for the file/s into its database for that project. The files are still referenced from wherever on storage you already have them.

And even if they look similar, the color/tonal controls for an NLE ... an editing app ... work very differently from a stills/photo app. Still apps work with one image at a time. NLEs work with thousands at a whack. Think ... 24fps timeline, 30 minutes long ... 24 x 60 x 30 ... that's 43,200 frames it has to plan out, all with various effects applied.

Even a five minute 24fps timeline has 7,200 frames!

There's a lot of things like that that can surprise people at first.

Neil

[R Neil Haugen]

PeruBob's correct.

So ... go to the original project sequence. Make the changes to correct things in that sequence. Then export from that, as many times in as many formats as you need.

Neil

[Celestia B.]

Thank you both so much!