If your video encoder supports the SRT protocol, BoxCast will likely support it. Video encoders we support include OBS, vMix, and Wirecast.
Static RTMP Channels
If your account has the SRT feature enabled, you'll have an SRT destination that stays the same for each broadcast. Your SRT sources are listed along with other sources under the Sources tab in the Dashboard. You can rename the source(s) for easier identification, as well as copy the parameters needed to configure an encoder.
The SRT settings can be configured in your encoder at any point. You can begin streaming from your encoder anytime, but it'll officially go live at the start time of your broadcast. We recommend starting the stream on your encoder 10–15 minutes before your broadcast starts. This will only stream to the back end of BoxCast and will go live at the time you scheduled it to begin.
Depending on your encoder, you may need to copy a single URL, or a set of parameters such as host, port, and stream ID. Follow the instructions on the dashboard for your encoder, and consult the information below for more details.
Specific Encoder Instructions
We've tested many different encoders and offer specific instructions for several of them. Please review the following topics if you're interested in more details about your specific encoder:
Open Broadcaster Software (OBS)
vMix
Wirecast
Blackmagic ATEM
Blackmagic Web Presenter
Other SRT Guides
SRT Encoder Configuration
The setup of your SRT encoder depends on the type of content you're streaming, network conditions, and desired quality, but here are the maximum bitrates that BoxCast accepts. Sending higher bitrate streams may result in poorer quality:
| Max Video Bit Rate | Max Audio Bit Rate |
480p30 | 3 Mbps | 320 kbps |
480p60 | 4.5 Mbps | 320 kbps |
720p30 | 5.25 Mbps | 320 kbps |
720p60 | 7.875 Mbps | 320 kbps |
1080p30 | 12 Mbps | 320 kbps |
1080p60 | 18 Mbps | 320 kbps |
Basic RTMP Settings
Video Parameters | Up to 1920x1080, 60fps |
Audio Parameters | Stereo (2-channel) |
Audio Sample Rate | 44.1 kHz or 48 kHz |
Rate Control | CBR or VBR |
Video Bit Rate | Up to 18 Mbps (depends on resolution; see table above) |
Audio Bit Rate | Up to 320 kbps |
Video Codec | h.264, High profile, Level 4.2
– OR –
HEVC, Main profile, Level 4.1 |
Audio Codec | AAC |
Common Questions
I'm seeing a message that says "The SRT source is not connected." What should I do?
If you're receiving this message in the BoxCast Dashboard, it means your encoder isn't connecting to our servers. Please make sure you copied the correct SRT configuration to your encoder and be sure you start streaming from the encoder. If you're getting an error from that encoder, please review our third-party encoder articles for more help.
What happens if my encoder stops mid-broadcast?
If that happens, you don't need to start another broadcast on the BoxCast Dashboard. Once your encoder reconnects, it'll start streaming from the same server as before. Prioritize getting your encoder working again — we'll start streaming once we receive data.
When I stop streaming from my encoder, does it end the broadcast?
No. You can end your broadcast using the Stop Broadcast button in the BoxCast Dashboard. This ensures the server on our end gets shut down. If you don't do this, the end of your video will keep looping and buffering for your viewers until the broadcast hits its end time.