Codec Settings

These following codec settings are the optimal settings for streaming destinations within Scrypted. Streaming destinations include:

• HomeKit
• Google Home
• Alexa
• Chromecast
• Web

Stream Setup

Configure all the available streams on your camera. Most cameras will have one 1 main stream and 1 substream. Some may only have 1 main stream. Cameras with 1 main stream and 2 sub streams are ideal.

• Some cameras, such as Hikvision or Amcrest, allow more stream options when AI is disabled. The camera AI is not used within Scrypted, and can be disabled for better performance.

1 Main Stream

• Main Stream
  • 1920x1080, 2 Mbit variable bitrate (remote streaming may suffer due to lack of sub streams)

1 Main Stream, 1 Sub Stream

• Main Stream (Max Available Resolution):
  • 3840x2160, 8 Mbit variable bitrate
  • 2688x1520, 3.5 Mbit variable bitrate
  • 1920x1080, 2 Mbit variable bitrate
• Sub Stream:
  • 1280x720 (or lower), 1 Mbit, variable bitrate

1 Main Stream, 2 Sub Streams

• Main Stream (Max Available Resolution):
  • 3840x2160, 8 Mbit variable bitrate
  • 2688x1520, 3.5 Mbit variable bitrate
  • 1920x1080, 2 Mbit variable bitrate
• Sub Stream 1 or 2:
  • 1280x720, 1 Mbit, variable bitrate
• Sub Stream 1 or 2:
  • 640x360, 500 Kbit variable bitrate

Configure Stream Codecs

• These settings apply for all the above streams.
• h264 video. Do NOT use H.264+, "Super" H.264, H.264B, or any other fancy variant. TURN IT OFF. Sometimes this unsupported variant setting is called "Smart Code(c)" and it should be set to "Close" or "Off".
• Any FPS between 10 and 30 is fine, and available FPS may depend on the camera and will determine the Frame Interval.
• 4 second keyframe interval
  • Keyframe Interval is the number of seconds between keyframes. Frame Interval is the number frames between keyframes.
  • Cameras are typically configured in Frame Interval rather than Keyframe Interval. The formula for Frame Interval value is: Frame Interval = 4 * FPS. Examples:
    • If FPS is 30, Frame Interval should be set to 120.
    • If FPS is 20, Frame Interval should be set to 80.
    • If FPS is 10, Frame Interval should be set to 40.
• Audio codecs, in order of preference:
  • Opus (used for live streaming to HomeKit or web)
  • PCM-ulaw/G711u (raw format suitable for web)