ATEM Mini Pro 720p/30 stream output

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karlalexpauls

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ATEM Mini Pro 720p/30 stream output

PostThu May 14, 2020 3:43 pm

I am a hobbyist documentarian and I specialize in live, on-location political events, demonstrations, and protests.

In many situations I do not have funds for a Live-U or despite having that device the network connection is poor enough that I would like to stream at a rate as low as 1 to 1.5mbps. In order to keep up with a moving shot this means that I cannot shoot 60 fps full HD.

In the product specs I saw that the ATEM Mini Pro is able to scale the camera output as needed. However it appears that the stream output selects the highest frame rate and resolution provided to the device. Creating a custom streaming profile does not reduce the frame rate or resolution as I expected.

The Mini Pro is a great product and it helps me get twice the battery life out of my mobile backpack than what I could achieve with an Intel i5 NUC. The cost is about the same, however without the ability to downscale the stream resolution the ATEM is a downgrade in capabilities for my use-case and will be left at home instead of providing me the more reliable and efficient mobile stream studio that I was hoping to achieve.

Please let me know if I've missed a setting in the ATEM control software or if I can use some method to constrain my stream output to 720p/30.
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karlalexpauls

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Re: ATEM Mini Pro 720p/30 stream output

PostThu May 14, 2020 6:59 pm

I found the Settings button, but unfortunately 1080p/23.98 is the lowest setting I can achieve.

I also tried forcing my cameras down to 720p/60 and that didn't change the resolution visible in the Settings Video Standard "Auto Mode".

Please consider this a feature request for 720p/30 outputs.
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Denny Smith

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Re: ATEM Mini Pro 720p/30 stream output

PostFri May 15, 2020 5:41 am

Sorry, 720p30 is not a standard video resolution, it is 720p59.84 (60).
Cheers
Denny Smith
SHA Productions
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karlalexpauls

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Re: ATEM Mini Pro 720p/30 stream output

PostFri May 15, 2020 4:16 pm

Denny Smith wrote:Sorry, 720p30 is not a standard video resolution, it is 720p59.84 (60).
Cheers


720p60 is not available in the ATEM Mini Pro's Settings menu.
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Denny Smith

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Re: ATEM Mini Pro 720p/30 stream output

PostSat May 16, 2020 12:51 am

No, and neither is 720p30. The ATEM Mini is a full 1080pmHD device. You need a Up/Down/Cross converter to get 720p60, or feed the HDMI output of the Mini into a WebPresenter which converts the USB output to a 720p webcam.
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Denny Smith
SHA Productions
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Stefan Flos

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Re: ATEM Mini Pro 720p/30 stream output

PostSun May 17, 2020 12:38 pm

or use the webpresenter: that is 720 max...
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karlalexpauls

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Re: ATEM Mini Pro 720p/30 stream output

PostSat May 23, 2020 7:34 pm

Denny Smith wrote:You need a Up/Down/Cross converter to get 720p60


You seem to have some problem understanding my post. I'm requesting 720p30 streaming output.

I am able to recover some bandwidth using 1080p24 but 720p30 would be much better.

I appreciate focusing on that as my use-case and helping keep that clear for Blackmagic developers reading this forum for feedback.
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ishootyou.com

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Re: ATEM Mini Pro 720p/30 stream output

PostSat May 23, 2020 9:42 pm

Bring it into OBS and stream from there setting OBS to whatever you need. Another option would be a Webcaster X2 as a streaming device.
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ishootyou.com
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DavidSwinehart

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Re: ATEM Mini Pro 720p/30 stream output

PostSat May 23, 2020 11:20 pm

I'm in a similar situation, where I am now streaming weekly from my church during the COVID pandemic, and the internet signal from their ISP is unreliable and often insufficient to support even the "low" (3500/Kbps) stream setting from the ATEM Mini Pro.

At the moment, we're bringing the signal over to my MacBook Pro via USB-C and encoding the stream with OBS. OBS can downgrade the signal to 720 / 30fps / 2000Kbps, but as anyone who has used OBS with a newer MacBook knows, it's a horrible experience.

What I think the OP is getting at, and I want the same thing, is the ability to output the encoded stream directly from the Mini Pro at 720 / 30fps / 2000Kbps (I think YouTube Live gives error messages when the signal is less than 2000Kbps).

Since the Mini Pro already has multiple encode quality options and frame rates, is it possible to write a script to create a "baseline" quality option?
Forgive my ignorance - I'm a producer and not an engineer, so I'm not educated on how this works.

The whole purpose of trading our ATEM Mini for the Pro model was to use the built-in encoder and bypass OBS. It's frustrating that OBS gives options all the way down to SD but the Mini Pro does not.
David
OakParkStudios, Inc
Kansas City, MO
Ursa Mini 4K, Sony FS5, Sony A7R-II, BMD Video Assist, ATEM Mini Pro, DaVinci Resolve 16.2, iMac i7, 32GB, Radeon 560x, MacBook Pro i9, 32GB, Radeon 560x
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Dave Del Vecchio

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Re: ATEM Mini Pro 720p/30 stream output

PostSat May 23, 2020 11:55 pm

As mentioned on the technical specifications page for the ATEM Mini Pro, only the following 1080p streaming output resolutions are supported:
https://www.blackmagicdesign.com/produc ... s/W-APS-14
Video Streaming Standards
1080p23.98, 1080p24, 1080p25, 1080p29.97, 1080p30, 1080p50, 1080p59.94, 1080p60
If you edit the XML configuration file for the streaming settings, you might be able to lower the bitrate for one of the 1080p encoding levels to 2000 Kbps, although I'm not sure what the resulting video quality will be as 2000 Kbps is a bit low for a 1080p stream. Some additional information about editing the XML file can be found in this thread:
viewtopic.php?f=4&t=110844

It would certainly be nice if Blackmagic added support for scaling on the ATEM Mini Pro stream output, but this isn't supported at the moment and it's not clear if there is sufficient processing power in the ATEM Mini hardware to allow for output scaling to arbitrary resolutions and frame rates.
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Denny Smith

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Re: ATEM Mini Pro 720p/30 stream output

PostSun May 24, 2020 2:52 pm

Adding to what Dave wrote, the ATEM Mini was designed as a 1080p device. For a 720p webcam output, BMD makes the Web Presenter. I agree with Dave, in I doubt BMD will downscale the Mini to 720p.

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Denny Smith
SHA Productions
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karlalexpauls

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Re: ATEM Mini Pro 720p/30 stream output

PostFri May 29, 2020 3:18 am

ishootyou.com wrote:Bring it into OBS and stream from there setting OBS to whatever you need. Another option would be a Webcaster X2 as a streaming device.


The ATEM Mini Pro provides me 6 hours of streaming. An Intel NUC i5 with 2 Cam Links will only run for a little over 2 hours.

Have a look at Unicorn Riot's broadcast today to get a sense of what kinds of situations this might be useful in.
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karlalexpauls

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Re: ATEM Mini Pro 720p/30 stream output

PostFri May 29, 2020 3:21 am

Dave Del Vecchio wrote:If you edit the XML configuration file for the streaming settings, you might be able to lower the bitrate for one of the 1080p encoding levels to 2000 Kbps, although I'm not sure what the resulting video quality will be as 2000 Kbps is a bit low for a 1080p stream.


I have been able to test streaming at 1080p24 from 1.2 mbit to 2.4 mbit.

I use multiple sites, some which do not limit me to 2 mbit. Also when my data link is especially congested it would be useful to go as low as possible in order to maintain a connection. I have remote offline protection, but getting a continuous stream is more important.
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TimBradley

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Re: ATEM Mini Pro 720p/30 stream output

PostSun May 31, 2020 11:49 pm

I want to be able to stream to Facebook which wants 720P. Please give us an option for outputing that (in PAL - 25P)

Thank you!

Cheers,
Tim
Tim Bradley
Video Cameraman and Live Streaming
Sydney Austalia
http://sydneydop.com.au/livestreaming-webcasting/
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tim_hughes

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Re: ATEM Mini Pro 720p/30 stream output

PostSun May 31, 2020 11:59 pm

+1 for 720 output please BMD!

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