Quote: I'm wondering how/why the bitrate changed? And it went *down* from 22.500K to 12.654K. When I produced the second movie, I used the existing "AVC 1280x720 60p (24Mbps)" profile since I didn't know how to create the recommended Custom Profile. Did choosing a higer bit rate than what was indicated by the SVRT analysis somehow cause the resulting file to be so much larger?

SVRT is affected by the colorboard content in video track 2. As proof, slide the colorboard down the timeline a bit so it does not start at 0:00 and remove the "orange i" enhancment from the video then do Alt+S to refresh the SVRT information. You will probably recover your orignal profile.

SVRT really does not matter here once you add the colorboard, the entire timeline needs to be encoded anyhow. You have also applied some type of correction, the "orange i", would have been better to do that initially.

Jeff

Thanks to both of you - I'm continuing my gradual climb up the learning curve.

So no re-rendering is required/SVRT is enabled/the built-in "AVC 1280x720 60p" profile is suggested as long as I don't introduce either the crop (the "orange_i") or the black color board. Doing either of these seems to cause PD to want to re-render things (which I guess I understand).

I also noticed that after doing the first production to merge the seven clips into one, importing it into the timeline, right-clicking on it to "View Properties", that its bitrate is 12.66 Mbps (see attachment). No crop or black color boards have been added yet. And the built-in profile with its bitrate of 22.500 Mbps is still the suggested/available one.

So it would seem that once re-rendering is needed (either by crop or color boards or both), that's when PD suggests the "Custom Profile". In "Produce" I still select the settings for H.264 AVC 1280x720 60p - and while the re-rendering works, it produces the much larger file.

Anyway, with allthat as background... I figured out how to create the Custom Profile, with the only difference being a bitrate of 12.654 Mbps instead of 22.500 Mbps, and re-rendered the movie with the crop and color boards. It did take much longer, but the result? The quality is the same (I asked three different people to see if they could tell a difference between the original captured clips and the final result, and they could not!). And the best news? The resulting file was 4.1 GB! So the difference in file size seems to be attributable to the bitrate used in the profile.

So... I think I'm done with all my questions now! Any more I have, I'll probably just open another topic. I'm truly grateful to you (both) for your patience and guidance!

Dave

Dave -

Great that you've got the outcome you were after & learnt a lot on the way.

What is the video bitrate of the original clips? Is it 22.5Mbps? SVRT suggested a 24Mbps profile, so that seems right.

On my tests, I used a .png overlay rather than colour boards & cropped as you did. Yet there wasn't such a dramatic shift in bitrate.

Cheers - Tony
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Hi Tony,

The bitrate on the original clips was around 12.6 Mbps. I guess PD suggested the 22.5 Mbps because that's the bitrate of the only bulit-in AVC 1280x720 60p profile?

But, it must have only come into play when I had to reencode(?)/rerender after the crop and color boards. When I selected the built-in profile with the 22.5 Mbps bitrate, I'm thinking that's what caused the jump in file size to 7.5 GB. When I created and used the Custom Profile with a 12.6 Mbps bitrate, the output file size went back to being 4.1 GB.

Thanks again and see you around these forums! :^)

Dave