📡 Stream Playback

StPlayer provides low-latency UDP stream playback, supporting both unicast and multicast FMV streams.

To start, select New Stream Session from the menu to open the stream configuration page.

Stream Playback

⚙️ Configuration Parameters

  • NIC, IP, and Port
    Stream access parameters (network interface, IP address, and port).

  • Cache (Dejitter Buffer)
    Set this as low as possible for minimal latency.
    If the stream has significant jitter, increase this value for smoother playback.

  • Timeout
    The player will report an error if no stream is received for the specified duration.

  • Low Latency Mode
    When enabled, the player is optimized for minimal latency.
    Note: The cache value is ignored and playback might not be smooth. Use with caution.

  • TS over RTP
    Enable this option if your stream is TS over RTP.

  • URL
    Information field showing the final stream URL passed to the player.

🎯 Select the UDP IP and Port of your stream and press play to begin playback.

⚠️ Note:
If your source is a unicast stream, StPlayer automatically recasts it to multicast using the first available port (with TTL=1).
This allows simultaneous recording from the same socket.

Local unicast recasting to multicast

🔁 RTP Stream Playback

When receiving RTP streams, the payload format must be specified.
Supported formats include:

  • m2t (MPEG-TS over RTP)
  • h264
  • h265
  • av1

RTP playback

⚠️ Note: DVR and recording functionality are not available for RTP streams.

🎥 RTSP Stream Playback

To play RTSP streams, select New RTSP Session from the File menu.

RTSP playback

⚠️ Note: DVR and recording are not available for RTSP streams.

🧪 PCAP Playback

You can play stream data directly from .pcap files.

  • Select PCAP in the session configuration menu,
    or simply drag and drop a .pcap file into the player.

Pcap playback

⚠️ Note: - This is primarily a debugging feature and may not work for all files.
- Unicast-to-multicast recasting is disabled during PCAP playback.
- Recording is also disabled.
- If your file is in .pcapng format, convert it to .pcap first.

🔄 Out-of-Band KLV Support

You can receive out-of-band KLV data in RAW KLV format.
To configure it, provide the appropriate NIC, IP, and port as shown below:

OTB KLV