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Streaming Bridge - compatibility with standard RTMP

PostPosted: Thu Jul 30, 2020 9:43 pm
by Asgeir Hustad
Can the Streaming Bridge receive any H264 RTMP-stream, or is there something specific to ATEMs required?

I have a few LiveU-units used in the field (bonding 4G via LRT, which then pushes RTMP stream to the control room receiver) - would love it if the Streaming Bridge could be used to receive and play that stream in the MCR. Dedicated, tiny hardware for $245 compared to using a laptop or a NUC could save a lot on cost and setup complexity.

I've also got access to services that allow RTMP Pull as well as the usual RTMP Push, if that's required.

Here's to hoping BMD have implemented this in a compatible fashion!

Re: Streaming Bridge - compatibility with standard RTMP

PostPosted: Thu Jul 30, 2020 10:28 pm
by Dave Del Vecchio
I'd expect that this will likely end up depending on the H.264 decoding engine in the ATEM Streaming Bridge. If I had to guess, I'd say that it will probably only be capable of decoding H.264 video that is encoded in the specific flavors that the ATEM Mini Pro (and ATEM Mini Pro ISO) support for streaming.

If you are able to exactly match the H.264 encoding specs (including resolution, frame rate, bit depth, chroma subsampling, entropy encoding, audio codec, etc.) of one of the ATEM Mini Pro encoding formats, and send that to the ATEM Streaming Bridge from some other encoder, then it probably has a decent chance of working (since the RTMP protocol itself is fairly standardized).

However, if you send video in some different format, then it may not work. For example, the listed output specs for the ATEM Streaming Bridge does not list any 720p formats, only 1080p:
https://www.blackmagicdesign.com/produc ... s/W-APS-16

This is consistent with what the ATEM Mini Pro is capable of sending, but it probably means that if you were to send a 720p RTMP stream to the ATEM Streaming Bridge, it likely will not work.

Note that there are a couple of other standalone hardware RTMP decoder units that are already available from other manufacturers as discussed in this thread:
viewtopic.php?f=4&t=115156

Re: Streaming Bridge - compatibility with standard RTMP

PostPosted: Thu Jul 30, 2020 10:49 pm
by LouisBacker
It would be useful to know if you could send H.264 via RTMP to it from say OBS...

Re: Streaming Bridge - compatibility with standard RTMP

PostPosted: Thu Jul 30, 2020 10:51 pm
by Roman Pytkin Pekarek
Asgeir Hustad wrote:I have a few LiveU-units used in the field (bonding 4G via LRT, which then pushes RTMP stream to the control room receiver) - would love it if the Streaming Bridge could be used to receive and play that stream in the MCR. Dedicated, tiny hardware for $245 compared to using a laptop or a NUC could save a lot on cost and setup complexity.

Im using for this Raspberry PI for $30 .. It is save much more costs to me :)

Re: Streaming Bridge - compatibility with standard RTMP

PostPosted: Fri Jul 31, 2020 6:35 am
by Raphaël Jacquot
Roman Pytkin Pekarek wrote:Im using for this Raspberry PI for $30 .. It is save much more costs to me :)


I'm still waiting for a raspberry-pi with 12G SDI output ;-)

Re: Streaming Bridge - compatibility with standard RTMP

PostPosted: Fri Jul 31, 2020 1:36 pm
by Andrew Martin
We'll need to wait until someone has one, to investigate what setup parameters are saved in the stream bridges .xml saved out file.

Sent from my SM-G935F using Tapatalk

Re: Streaming Bridge - compatibility with standard RTMP

PostPosted: Fri Jul 31, 2020 11:07 pm
by Roman Pytkin Pekarek
Raphaël Jacquot wrote:
Roman Pytkin Pekarek wrote:Im using for this Raspberry PI for $30 .. It is save much more costs to me :)


I'm still waiting for a raspberry-pi with 12G SDI output ;-)


Im mostly send HDMI out of RPI into ATEM .. Not need SDI .. But U can add BMD converter , to get 12G SDI output ..