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Need the smallest file possible for exporting

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Forrest McBride
Need the smallest file possible for exporting
on Jun 13, 2017 at 7:12:50 pm

So I made a series of 2-minute clips for the company I'm working for.

However, the 150mb files are too big for them. At the moment I'm exporting 1080p in H.264.

They want the files to be around 30mb, is this possible without losing a lot of quality?


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Tero Ahlfors
Re: Need the smallest file possible for exporting
on Jun 14, 2017 at 3:55:19 am

[Forrest McBride] "They want the files to be around 30mb, is this possible without losing a lot of quality?
"


You can set the bitrate so that the file will be under 30 megs. That will probably look bad because it's not a lot of data for a 2 minute video.


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Michael Krueger
Re: Need the smallest file possible for exporting
on Jun 14, 2017 at 12:37:13 pm

Set the video target bitrate to 2 Mbit, video maximum to 3 Mbit and donĀ“t forget to also lower the audio bitrate to 96 kbit.
Depending on the source material (movement, noise, lighting) you will lose a lot of quality but there's no way around it when size matters.


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Jeff Pulera
Re: Need the smallest file possible for exporting
on Jun 14, 2017 at 1:49:34 pm

It is true that the only way to make a file smaller is to lower the bitrate. However, using a smaller frame size will get you more quality at that lower bitrate, since there is less video to compress.

So for instance, at a given (low) bitrate, a 720p video should in theory look better than a 1080p video at that same bitrate, since far less pixels needed to be compressed. The question is then, how will the video be used/viewed? 720p is still HD video and would seem to be a better choice in this situation. Or how about 360p, which is 640x360?

Not knowing the content of the video or intended viewing methods, hard to say, but if for instance this is a talking head video, 360p could look just fine!

Thanks

Jeff Pulera
Safe Harbor Computers


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Dave LaRonde
Re: Need the smallest file possible for exporting
on Jun 14, 2017 at 4:55:31 pm

Would it be a faux pas for you to also reduce the horizontal & vertical resolution and reduce the frame rate?

If the video file is 1) smaller and 2) has fewer frames to compress, the compression won't look as bad.

Something's gotta give when you compress the bejeezus out of a file......

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Chris Wright
Re: Need the smallest file possible for exporting
on Jun 15, 2017 at 6:34:36 am

If you choose aac audio, you can go 64kbps that will sound like 128.
Half your resolution.
Also framerate can be lowered with optical flow.
Do a heavy denoise first before compression.


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