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Any Pro Premiere user can answer this question regarding scaling?
I use a smaller resolution timeline in my editing. My original clips I use are twice bigger, so in order to fit them in my timeline I use Scale to Frame Size function in my clips.
But on the final, or for bits I want to reuse in other editor I export them in the same original resolution. I have no idea if there’s a quality loss by doing that. Neither if I create a master timeline and scale them back to the original resolution. Most of the time my clips are heavily edited and uncheck the auto scale function will ruins some of the effects and adjustments.
Is rendering the clip by specifying the original resolution in the video dialog box will is a lossy solution or Premiere is enough smart to take the clip from it original resolution and render it as is?
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2 Replies
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As far as I recall from my experiments with image resizing, scaling a picture down, then blowing up the output on export will resize your picture twice. So if you scaled a 1080 jpg to fit a 640×360 timeline, then output a movie at 1080, it would look pretty awful.
I remember being somewhat shocked at the time that the computer KNOWS the resolution so the sensible thing would be to work from the original resolution, but it’s probably not so straightforward when you’re writing an app as complex as Premiere. Final Cut Studio was the same.
Maybe it’s been changed in more recent versions – can anyone correct me? -
You would think it would make sense for the exporter to refer back to the original clips when re-encoding, however as you have found out, it doesn’t seem to be capable of doing that.
I believe Media Encoder will only look at the sequence at the resolution it has been set at before doing the encode.
Is there any reason for editing in the smaller resolution timeline? e.g. if you may want to use the footage in a higher resolution later, then I would edit in the higher res and down-res the final output as required – it is always better to re-encode down, rather than up!
If you have some lower resolution footage you want to use, have you tried running it through After Effect’s detail-preserving upscale? I haven’t tried it myself, but I am keen to give it a go!
https://tv.adobe.com/watch/adobe-at-ibc-2013/after-effects-cc-detailpreserving-upscale/
Unfortunately, this is just one of those things that you need to take into consideration when planning your workflow before the edit.
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