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Supported parameters

Gcore Video Streaming supports:

  • Receiving live streams from your server (PULL) or a dedicated publishing point (PUSH) using numerous protocols including RTMP(S) and SRT. All supported live protocols are listed in the table below. The stream is transcoded and sent with adaptive streaming via CDN in HLS/MPEG-DASH (CMAF low latency) formats.
  • Videos uploaded in almost any format, from standard MP4 to 4K HDR Video, are first transcoded to get videos of lower quality. Then, they’re sent with adaptive streaming via CDN in HLS format.

We recommend the following parameters for streams:

ParametersValue
Video bitrate and resolutionQualityResolutionVideo bitrate range
4k3840x216020,000–51,000 Kbps (60 fps), 13,000–34,000 Kbps (30 fps)
14402560x14409,000–18,000 Kbps (60 fps), 6,000–13,000 Kbps (30 fps)
10801920x10804,500–9,000 Kbps (60 fps), 3,000–6,000 Kbps (30 fps)
7201280x7202,250–6,000 Kbps (60 fps), 1,500–4,000 Kbps (30 fps)
480854x480500–2,000 Kbps
Frame rateUp to 60 fps
Audio codecAAC, MP3
Video codecH.264, H.265, AV1
Max original file size (VOD)up to 30 GB
Container (VOD)

3g2, 3gp, asf, avi, dif, dv, flv, f4v, m4v, mov, mp4, mpeg, mpg, mts, m2t, m2ts, qt, wmv, vob, mkv, ogv, webm, vob, ogg, mxf, quicktime, x-ms-wmv, mpeg-tts, vnd.dlna.mpeg-tts

Live protocols (Live)RTMP, RTMPS, SRT, RTSP, HLS, WebRTC
Keyframe frequency (Live)1–2s
Bitrate encodingCBR
Pixel aspect ratioSquare
Chroma subsampling4:2:0
Audio sample rate44.1/48 kHz
Audio bitrate128 Kbps stereo

If the recommended parameters do not suit your stream (codecs, custom FPS, ProRes, High 4:4:4, Enhanced RTMP, etc.), write to us in the chat, send an email to support@gcore.com, or contact your manager to find the solution.

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Multiple ingesting points

For smoother and more reliable streaming, we offer entry servers in key regions including Luxembourg, Ashburn, Miami, and Singapore. By connecting your streaming equipment to the nearest upload server, you can minimize latency and improve performance before the stream is distributed globally through our CDN.

This feature is especially valuable if your streams originate from multiple locations worldwide. You can specify preferred upload servers and the number of streams per region. Our team will then configure your account to match your streaming setup.

Reach out to our support team or your account manager for setup assistance or additional details.

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RTMP, RTMPS, and SRT for live streaming

  • RTMP (Real-Time Messaging Protocol) is a protocol for transmitting audio, video, and data over the Internet between a player and a server, supporting low-latency communication for real-time streaming.
  • RTMPS is a variation of RTMP but incorporates SSL usage.
  • RTSP (Real Time Streaming Protocol) is a communication protocol used to control servers that stream media content. RTSP uses the Real-time Transport Protocol (RTP) with Real-time Control Protocol (RTCP) to deliver media streams.
  • SRT (Secure Reliable Transport) is an open-source video transport protocol for delivering high-quality, secure, low-latency video across unreliable networks.

You can use Push or Pull methods where applicable.

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RTMP(S) troubleshooting

ErrorCauseSolution
SSL issuesYou used rtmps:// but in the encoder rtmp:// is specifiedCheck the protocol in your encoder. Follow step 3 of the guide.
You used a port (80) unsuitable for secure data transferManually add a correct port (443) to the server link, e.g.: rtmp://vp-push-ed1.gvideo.co:443/in/
No transcoding or image degradation when using web cameras with custom video codecsThe video codec H264+ extension has an over-increased keyframe

Check the outgoing live stream parameters of the web camera:

  • Streams must be encoded by H264. No hacks/codecs like H264+ may be used.
  • “Smart” mode codecs must be turned off.
“Connection timed out”The server URL is incorrectCheck the server URL in the encoder settings. Ensure that protocol is rtmps://.
Your encoder doesn’t support RTMPSCheck if there is RTMPS support, change encoder if required