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The Daily class provides static methods for initializing the SDK, managing logging, and creating virtual media devices.

​
init()

Initializes the Daily SDK. Must be called before creating any CallClient instances. 
from daily import Daily, LogLevel

Daily.init(worker_threads=2, log_level=LogLevel.Info)

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Parameters

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worker_threads
int
default:"2"
Number of worker threads to use for media processing.
​
log_level
LogLevel
default:"LogLevel.Off"
Initial logging level. Can be one of: LogLevel.Off, LogLevel.Error, LogLevel.Warn, LogLevel.Info, LogLevel.Debug, LogLevel.Trace.

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Returns

This method does not return a value.

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deinit()

Cleans up and shuts down the Daily SDK. Should be called when your application is done using Daily. 
Daily.deinit()

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Returns

This method does not return a value.

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set_log_level()

Changes the SDK logging level at runtime. 
from daily import Daily, LogLevel

Daily.set_log_level(LogLevel.Debug)

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Parameters

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log_level
LogLevel
required
New logging level. Can be one of: LogLevel.Off, LogLevel.Error, LogLevel.Warn, LogLevel.Info, LogLevel.Debug, LogLevel.Trace.

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Returns

This method does not return a value.

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create_camera_device()

Creates a virtual camera device for streaming video into a Daily call. 
from daily import Daily

camera = Daily.create_camera_device(
    device_name="my-camera",
    width=1280,
    height=720,
    color_format="RGBA"
)

# Write frames to the camera
camera.write_frame(frame_bytes)

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Parameters

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device_name
str
required
Name identifier for the virtual camera device.
​
width
int
required
Width of the video frames in pixels.
​
height
int
required
Height of the video frames in pixels.
​
color_format
str
default:"RGBA"
Color format for video frames. Supported formats include “RGBA”, “RGB”, “BGRA”, “BGR”.

​
Returns

A virtual camera device instance that can be used to write video frames.

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create_speaker_device()

Creates a virtual speaker device for receiving audio output from a Daily call. 
from daily import Daily

speaker = Daily.create_speaker_device(
    device_name="my-speaker",
    sample_rate=16000,
    channels=1,
    non_blocking=False
)

# Read audio frames from the speaker
audio_data = speaker.read_frames(num_frames=160)

​
Parameters

​
device_name
str
required
Name identifier for the virtual speaker device.
​
sample_rate
int
default:"16000"
Audio sample rate in Hz (e.g., 16000, 24000, 48000).
​
channels
int
default:"1"
Number of audio channels (1 for mono, 2 for stereo).
​
non_blocking
bool
default:"False"
If True, read operations will not block when no audio is available.

​
Returns

A virtual speaker device instance that can be used to read audio frames.

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create_microphone_device()

Creates a virtual microphone device for streaming audio into a Daily call. 
from daily import Daily

mic = Daily.create_microphone_device(
    device_name="my-microphone",
    sample_rate=16000,
    channels=1,
    non_blocking=False
)

# Write audio frames to the microphone
mic.write_frames(audio_bytes)

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Parameters

​
device_name
str
required
Name identifier for the virtual microphone device.
​
sample_rate
int
default:"16000"
Audio sample rate in Hz (e.g., 16000, 24000, 48000).
​
channels
int
default:"1"
Number of audio channels (1 for mono, 2 for stereo).
​
non_blocking
bool
default:"False"
If True, write operations will not block when the buffer is full.

​
Returns

A virtual microphone device instance that can be used to write audio frames.

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create_native_vad()

Creates a native Voice Activity Detection (VAD) analyzer for detecting speech in audio. 
from daily import Daily

vad = Daily.create_native_vad(
    reset_period_ms=500,
    sample_rate=16000,
    channels=1
)

# Analyze audio frames
confidence = vad.analyze_frames(audio_bytes)
if confidence > 0.5:
    print("Speech detected!")

​
Parameters

​
reset_period_ms
int
default:"500"
Period in milliseconds after which VAD state resets.
​
sample_rate
int
default:"16000"
Audio sample rate in Hz (e.g., 16000, 24000, 48000).
​
channels
int
default:"1"
Number of audio channels (1 for mono, 2 for stereo).

​
Returns

A native VAD analyzer instance that can detect voice activity in audio frames.

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select_speaker_device()

Selects a specific speaker device for audio output. 
from daily import Daily

Daily.select_speaker_device("my-speaker")

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Parameters

​
device_name
str
required
Name of the speaker device to select for audio output.

​
Returns

This method does not return a value.

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Complete Example

from daily import Daily, LogLevel, CallClient

# Initialize the SDK
Daily.init(worker_threads=4, log_level=LogLevel.Info)

# Create virtual devices
camera = Daily.create_camera_device("bot-camera", 1280, 720)
mic = Daily.create_microphone_device("bot-mic", sample_rate=16000)
speaker = Daily.create_speaker_device("bot-speaker", sample_rate=16000)

# Create and use call client
client = CallClient()
client.join("https://your-domain.daily.co/room-name")

# ... use the devices during the call ...

# Clean up
client.leave()
Daily.deinit()

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