[Daniel Low]

Have a look at this:

https://homepage.mac.com/major4/

Specifically:
https://ffmpegx.com/tools.html

and/or this:
https://www.squared5.com/svideo/mpeg-streamclip-mac.html

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[Daniel Low]

I think you’ll find that it’s your audio setup/prefs in FCP that will control how this works on export. One for the FCP forum maybe.

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[Daniel Low]

In the Crop settings under video profile, do you have ‘Sync Size to crop’ checked?

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[Daniel Low]

Yup, 16Mb/s is crazy. You can do 1920×1080 (H.264 or WMV) at around 10-12Mb/s and it’ll look fantastic (given the right source, of course).

I hope you don’t run in to more problems as a result!

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[Daniel Low]

It could be anything. I don’t think the data rate is too high though, unless the PC is ancient. I’d try reducing the video frame size to something like 640×360 or less.

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[Daniel Low]

MPEG-1 should work well at decent enough bitrates.

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[Daniel Low]

Ok, that clip sounds like it’s a Reference Movie, rather than a self-contained movie

Where did you get it from / how did you get it?

If you open it in Quicktime player and get info on it (Hold down the Apple Key and press i), please give me all the details that are listed:

Source:
Format:
FPS:
Data size:
Data Rate:
Duration:

Now choose ‘Save As’ from the Quicktime file menu. Choose ‘Save as Self-contained Movie’ and put ‘SC’ towards the end of the file name, then save it to the same directory as the other one.

Now go and look at the file size of that newly saved file.

I think you’ll see a much larger file.

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[Daniel Low]

There seems to be some confusion about datarates and file sizes.

It is impossible to encode a video to 50 Kilobits per second unless you are prepared to drop the frame size to something like 160×120 or smaller.

Is it that you are getting Kilobits and KiloBytes mixed up?

50 KiloBytes = 400 Kilobits

So, are we talking file size or data rate? KiloBytes or Kilobits?

With video you generally refer to the datarate not the file size because:
filesize = the_datarate x the_duration_of_the_clip

So a 1 minute clip with a constant datarate of 500Kbit/s per second would be roughly 3750 KBytes or 3.75 MegaBytes in file size.

500 x 60 seconds/8

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[Daniel Low]

Episode from Telestream.

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[Daniel Low]

I actually meant how did you come up with those settings?

You shouldn’t ever dictate the frame size of a video purely based on how it fits into a web page. It’s best to go for a size that is correct for the video that will fit within the the space you have.

These are examples of ‘correct’ 16:9 frame sizes:
640 x 360
512 x 288 – this is ‘probably’ ideal for you.
448 x 252
384 x 216

If you don’t choose a correct frames size, the quality of the video will suffer.

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