Why is the cam quality from the web presenter so poor?

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Lailla Elgohary

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Why is the cam quality from the web presenter so poor?

PostSun Jun 25, 2017 7:55 pm

So I bought my Blackmagic Web Presenter so I can start live streaming videos with the quality of my good cameras (i.e. Sony a6500, Blackmagic ursa mini 4.6k) however I'm getting very poor quality that my standard webcam gets better results.

Case in point below, I was using my Sony A6500 here.
The first image is from the live stream (as seen/tested from Photo booth on my Macbook pro) Very poor quality.
webcam.jpg
webcam.jpg (197.46 KiB) Viewed 2294 times


And here is an image from the video which was being recorded simultaneously from the camera at the same time (so I could compare).
cam.jpg
cam.jpg (250.34 KiB) Viewed 2294 times


Completely different quality. Is this meant to be normal? If so why spend money on this if it the quality is subpar in comparison to a standard webcam? If not, what am I doing wrong? Please help!
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Fernando Orozco

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Re: Why is the cam quality from the web presenter so poor?

PostSun Jun 25, 2017 9:53 pm

You know that web presenter only works up to 720p? it downconverts so video can go through usb 2.0 bandwidth limitation
"Any sufficiently advanced technology is indistinguishable from magic" Arthur C. Clarke
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Tarek Saneh

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Re: Why is the cam quality from the web presenter so poor?

PostSun Jun 25, 2017 11:02 pm

Hey Leilla if you want to stream 1080p from your cameras you need a card like decklink and fast internet connection.
Web presenter will always take your video signal and compressed like a webcam to send it thru usb 2
Tarek Saneh
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http://www.wonderweb.ae
Dubai - UAE
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Tom_Bassford

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Re: Why is the cam quality from the web presenter so poor?

PostTue Jun 27, 2017 10:00 pm

Your blacklevel is set wrong. I don't know what settings you have access to in the webpresenter but look for something such as ire = 0


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Lailla Elgohary

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Re: Why is the cam quality from the web presenter so poor?

PostTue Jul 04, 2017 10:24 am

Thanks for the replies all. Yes I'm aware it outputs to 720p (that 2nd image is set at 720p in camera to test comparison of quality) and yet the web presenter is still a lot poorer.

So is my first example image from the web presenter normal quality for what is expected from this?

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