Manually manage the minimum Bitrate of videos render?

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  • Updated 8 months ago
Hi,
Our LMS requires a minimum bit rate of 3500k for 720 or 1080 videos now after the LMS changed its Video player structure.
We are now getting our videos rejected by the system for not meeting the minimum requirements which is frustrating and delaying availability.

When I test this is Camtasia, I set the bit rate to 6000kbs and render. The finalized video gives me 1270k (just this example) so still does not meet the requirements. I cranked it up to 13000 and the render still finalized at 1270k. It seems Camtasia is making its own decisions on the quality output no matter what is chosen. Is there more control over this? Having a minimum bit-rate option is required.
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darren.mcneill

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Posted 8 months ago

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Joe Morgan

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Unfortunately, you cannot change this.
I had a discussion with tech support about this.

Camtasia renders everything at a variable bit rate. When you render by bit rate, the value depicts a rate the video won't exceed. With no control over minimum rate.
Your not the first one to encounter this. I was researching this topic for another forum member.The time frame is between 1 to 2 years back. I have no reason to think anythings changed.

I ran incremental test renders from 60% to 100% quality. I tried various bit rates.
If your video doesn't have a lot of different colors/motion or other elements that make for a large required bit rate, you'll never get there.

As a quick test,since it's been a while.....
I decided to go for 1 minute render of a rather plane video.
I rendered 1 at 100% quality and 1 at the max bit rate of 20,000.
The data rate didn't exceed 787kbps.Including audio.
The video I rendered appears at the bottom of the image below.I chose it because it it has so little color and narration as audio.
I think it makes for a good example of hard it might be to clear your minimum requirements .


Regards,Joe
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darren.mcneill

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Thanks Joe. My workaround right now is to bring the MP4 video from Camtasia into Handbrake and set the Average Bitrate Kbps to 3500 and use 2 pass Encoding. This not only reduced the average file size by about 60% and keeping the quality but each video is showing as 3498 Kbps so acceptable.

I do find it odd for the LMS to require a minimum bit rate of 3.5 mbps as this seems high for users to stream in low bandwidth areas and especially via mobile...
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Joe Morgan

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Yeah, I think its a poorly designed LMSĀ  myself. There only as good as those that created them.