Video Streaming with ATEM Television Studio and recorder

[Mathieu Marano]

Where do you want to stream? On the web, on a network, on a tv?

If your Pana cam has SDI you have to conver it to HDMI to feed the Atem Television Studio as it only has HDMI in.

Mathieu Marano
offline/online editor – motion graphics – Post-prod director – DaVinci Resolve operator
http://www.ilovehue.net

Administrator of the Montreal Final Cut User Group
http://www.finalcutmtl.org

[Mathieu Marano]

Where do you want to stream? On the web, on a network, on a tv?

If your Pana cam has SDI you have to conver it to HDMI to feed the Atem Television Studio as it only has HDMI in.

Mathieu Marano
offline/online editor – motion graphics – Post-prod director – DaVinci Resolve operator
http://www.ilovehue.net

Administrator of the Montreal Final Cut User Group
http://www.finalcutmtl.org

[Andreas Wojtaschek]

Sorry Mathieu,

that is not correct. The ATEM Television Studio has 6 inputs. 2 are shared between HDMI/SDI and 4 are SDI only.

You can indeed stream with the ATEM Television Studio because it has a built in H264 encoder. But you would have to use 2nd party software to do that like FFMPEG ore VLC.

Have a look here:
https://atemuser.com/forums/atem-vision-mixers/blackmagic-atems/livestream-atem-television-studio-justintv-or-ustreamtv

there are some examples on how to stream directly to the internet using the H264 stream of the ATVS.

Regards

Andreas

—

Entertainment Producer IHK
mindandvision

[Charles Burrows]

Well, It seems possible although I have some remaining questions:

If you connect the Panasonic P2 to the ATS through a SDI cable, you obtain only video signal, no sound. To get that sound it’s compulsory to use a sound mixer table with microphone entries and a miniConverter Audio to SDI, we use one from BlackMagic. From this converter, an SDI wire goes into the recorder, where two SSD hard drives record the video and audio signal into a .mov file.

So:

First: -If we can use the ATS for video streaming we will have no sound.

Second: ¿How do we connect the ATS to the internet? It is not possible, because the ADSL connection it has is used by the computer to control the card.

Third: There is no way to send the information from the ATS to the computer directly. The only chance to do that is to use a Dock Station to get the info recorded into the SSD.

A possible solution would be, perhaps, to buy a videocapture card to get the output signal from the recorder and send it through internet.

¿Do you think that this explanation is ok?¿Everything is true?¿It is possible to get the video and audio information directly to the ATS and stream it directly from the card?

[Charles Burrows]

Well, It seems possible although I have some remaining questions:

If you connect the Panasonic P2 to the ATS through a SDI cable, you obtain only video signal, no sound. To get that sound it’s compulsory to use a sound mixer table with microphone entries and a miniConverter Audio to SDI, we use one from BlackMagic. From this converter, an SDI wire goes into the recorder, where two SSD hard drives record the video and audio signal into a .mov file.

So:

First: -If we can use the ATS for video streaming we will have no sound.

Second: ¿How do we connect the ATS to the internet? It is not possible, because the ADSL connection it has is used by the computer to control the card.

Third: There is no way to send the information from the ATS to the computer directly. The only chance to do that is to use a Dock Station to get the info recorded into the SSD.

A possible solution would be, perhaps, to buy a videocapture card to get the output signal from the recorder and send it through internet.

¿Do you think that this explanation is ok?¿Everything is true?¿It is possible to get the video and audio information directly to the ATS and stream it directly from the card?

[Aleksander Steffensen]

The ATEM TVS is a vision mixer, not an audio mixer. Of course it will strip the embedded audio on the SDI sources, everything else would have made a heck of a mess.

The USB H.264 encoding is not for live streaming, it is for capturing a H.264 master file of the production that will be ready for upload instantly. To get audio in the H.264 recording, you have to feed the ATEM with an audio signal via AES/EBU from your audio mixer, either directly if it has digital outputs, or via an A/D converter. Still, do check the link that someone provided earlier in this thread, as there was a solution for live streaming from the ATEM TVS USB.

The way the USB recording work, is you hook the ATEM TVS up to a dedicated computer running the Media Express software.

Aleksander Steffensen
Steffensen Multimedia

[Jeff Hartman]

This thread is accumulating a number of incorrect statements, so here’s some background to try and clear up what the ATEM TVS does:

1) The unit has four SDI input connections and four HDMI input connections; you have access to six, of which two are always SDI, two are always HDMI, and the last two may be either SDI or HDMI. So if you need six SDI inputs, you will need two outboard SDI to HDMI converters.

2) The ATEM does not perform format conversions on the inputs; you need to set the ATEM to your desired program format (e.g., 720p, 1080i) and then ensure that every source matches that format — either by properly configuring the source, or by passing it through something like the Up/Down/Cross converter. A source that doesn’t match the switcher format simply won’t appear — you’ll get only black.

3) Embedded audio in a source feed does not pass through the ATEM.

4) The ATEM does have an unbalanced (BNC) AES audio input, which gets embedded into both the SDI and HDMI program outputs, and is encoded with the H.264 feed. To use this, you need an outboard audio mixer with an AES output, or a mixer with an analog output that is converted to AES.

5) The H.264 encoding is used solely to feed Blackmagic’s recording solution; it is not useful for live streaming. You will need some other device to take in the program feed and encode it for web streaming.

Hope this helps clear things up!

Regards,

Jeff Hartman
Engineering Project Manager
Newport Television, Northeast

[Jeff Hartman]

Okay, I missed one point in the thread I meant to cover:

If you have embedded audio in one or more of your SDI sources that needs to be mixed, you will need a de-embedder; either the Blackmagic SDI to Audio converter or the Blackmagic SDI to Analog converter could work, though there are some differences. (The product cited in the thread is a different product that accomplishes the opposite function, embedding audio into the video).

Typically, your embedded SDI feed would hit the converter, and the Loop SDI Out would continue on to feed the ATEM. The converter’s audio output would go to your audio mixer.

Which miniconverter you choose would be based on what your audio mixer needs:

• If you only need analog feeds from the first stereo pair, the SDI to Analog converter will work just fine, and costs less ($295 list). It also provides analog video output, which you probably won’t use.

• If you need more than one stereo pair, or if your audio mixer needs AES rather than analog audio feeds, you need to use the SDI to Audio converter ($495 list).

— Jeff

[Richard Freemantle]

Hi Jeff,

Re: Point 5.

The H.264 Encoder in the ATEM Television Studio CAN be used for live streaming, when attached to a PC/MAC.

The built in hardware h264 encoder is reasonably capable, its just that the software (Media Express) doesn’t give the user full access to it & only supports recording.

As mentioned earlier in this thread there are scripts for the mac. For PC users there is https://www.mxlight.co.uk .

Thanks
Richard Freemantle

[Jeff Hartman]

Thanks, Richard — I haven’t explored alternative software, and should have been more careful to state up front that my observations or recommendations are based strictly upon personal hands-on experience and on functionality that is directly supported by Blackmagic. Having said that, I should check out the software you refer to, as it could be very helpful for an application of mine.

Appreciate the heads-up!

— Jeff