Live streaming

With KLASH 4K UHD real-time live streaming, you can broadcast cameras, cinemas in post, and game engines in ultralow latency. Stream directly from Google Chrome and Microsoft Edge, the viewer can watch in any browser, or connect to an external encoder or streaming software.

Setting up a live stream

There are two ways to set up a live stream. The first one is browser streaming which is over the web and doesn't require any external hardware or software. The second one is external streaming with an encoder (streaming box), or OBS. Set up your live stream by the following steps:

1. Navigate to the project where you want to start your stream, and click the New button in the upper right corner, or right-click on any empty surface in the project bin.

2. Select New Stream and enter the stream name.

3. Click Share screen and choose what to share for browser streaming (tab, window, or entire screen), or External source for connecting an encoder or OBS, and enter the RTMP URL and RTMP stream key.

4. Navigate to the bottom panel to select streaming quality.

Here is an example of using the third-party software OBS Studio example.

Note: Google Chrome and Microsoft Edge on Windows are the only supported browsers for getting audio and stereo sound through the stream. On Mac, streaming desktop audio via a browser can be a little problematic and does not work out of the box, thus we recommend using third-party software such as BlackHole.

Recording

You can record the stream to view it at a later time and add feedback comments in a timeline. You will find the recording as a stacked version on the stream that you created, with the possibility of splitting them out. You can enable and disable recording on the start stream screen, or during the stream in the bottom panel.

To record a video meeting with audio from the meeting participants and any content shared during the meeting with OBS, such as a film or a game, enable system audio and mic in OBS, because the voices from the meeting participants are from system audio, and your voice is from mic. This is exactly what streamers do all the time. Make sure to mute the audio in the stream studio on KLASH to prevent echo. Start and stop the stream directly from OBS. When the meeting starts, you can hide KLASH studio to prevent screen mirroring.

Sharing a recording of your live stream

With recording enabled, you can share the stream recording with people who were not able to watch the live stream by using the normal steps for sharing content on KLASH Sharing files, folders, and projects.

Grading

In real-time grading and color correction sessions, there is usually a need to use a clean video signal to the stream to get the right colors, otherwise, the operating system will keep doing its display profiles. Preferably, you want to stream from a UI window with UI nodes. You might also not want to share the screen with the software interface. For grading, an encoder is commonly used. The encoder contains a video card, with SDI or HDMI input and output.

Recommendations

Lowering the streaming quality can fix latency issues. Also, the streaming bitrate can be too high for the broadcaster’s hardware. Adjusting the resolution and bitrate solves most issues.

The recommendation is a stable high-speed internet connection, otherwise, the stream might lag.

FAQ

How do I configure my network firewall to allow live streaming?

Make sure you are on a non-guest network. Most Wi-Fi guest networks are known to be very restrictive and the firewall may interfere. The following ports are required to be open on the firewall to allow streaming:

RTMP 1935 TCP RTSP 5554 WebRTC 5000-65000 UDP.

How can I solve problems related to a black screen in KLASH when using a Nvidia graphics card?

If you are using a Nvidia graphics card, try enabling Rescale output in OBS settings output. For other graphics cards, try to restart the stream and refresh the browser.

How can I solve problems related to no audio in my stream?

When sharing your screen through the browser, the only browser and operating system that supports system audio is Google Chrome on Windows or ChromeOS. MacOS and Linux do not support system audio in Chrome. Also, select Share system audio on the Chrome share screen popup.

When sharing your screen through an external encoder or OBS, the configuration may vary depending on the software you are using. We suggest looking up guides for the specific software you are using to learn how to configure your audio devices correctly.

Why can’t I publish my stream or view a stream?

Make sure you are on a non-guest network. Most Wi-Fi guest networks are known to be very restrictive and the firewall may interfere.