自定义推流

let customVideoTrack = srtc.createLocalCustomVideoTrack(desc: "canvas")
try await channel.publishLocalTrack(customVideoTrack)

customVideoTrack.pushFrame(pixelBuffer)

let customAudioTrack = srtc.createLocalCustomAudioTrack(desc: "bgm")
try await channel.publishLocalTrack(customAudioTrack)

customAudioTrack.pushAudioBuffer(pcmBuffer)

let track = srtc.createLocalCustomVideoTrack(desc: "custom")
try await channel.publishLocalTrack(track)

// 之后由业务层持续送帧
track.pushFrame(pixelBuffer)

final class PassThroughProcessor: VideoProcessor {
    func processVideoFrame(_ frame: VideoFrame) -> VideoFrame? {
        // 这里可以替换 pixelBuffer、加滤镜、打水印
        return frame
    }
}

let cameraTrack = srtc.createLocalCameraTrack(preset: .h720p)
cameraTrack.videoProcessors = [PassThroughProcessor()]
try await cameraTrack.startCapture()
try await channel.publishLocalTrack(cameraTrack)

final class MyAudioProcessor: NSObject, AudioProcessor {
    func audioProcessingInitialize(sampleRate sampleRateHz: Int, channels: Int) {}

    func audioProcessingProcess(audioBuffer: AudioBuffer) {
        // 可原地修改 Float 采样值
    }

    func audioProcessingRelease() {}
}

srtc.audioCaptureProcessor = MyAudioProcessor()

final class MyTranscriber: AudioRenderer {
    func render(pcmBuffer: AVAudioPCMBuffer) {
        // 将 PCM 数据送去做转写或录制
    }
}

let renderer = MyTranscriber()
remoteAudioTrack.add(audioRenderer: renderer)