HTML5 <audio>标签的流容器

Question

I have a Go application in which I would like to stream live uncompressed audio to the browser. I was hoping to stream over HTTP by just having the browser open a URL corresponding to the stream, and then feeding that connection with the audio data.

I was planning on using WAV to send the data uncompressed, However the WAV file format requires the file size be predefined in the header. Is there a better container format for doing this streaming that I can work with easily in Go?

I know that one approach would be to use a proper streaming server and transcode my audio through that, but if I'm implementing this myself, is there a fairly straightforward way to get off the ground? Perhaps a Go library to make this easier?

Thanks

EDIT I've solved this via ffmpeg as outlined in my answer below

Answer 1

Ok, here's what I ended up doing, my Go code pipes the raw PCM data through an ffmpeg process which converts it to mp3. I assume packets is a channel that my audio data is appearing over, and response is an http.ResponseWriter

cmd := exec.Command("ffmpeg", "-v", "verbose", "-f", "u16le", "-ar", "44100", "-ac", "1", "-i", "-", "-f", "mp3", "-")
audioIn, err := cmd.StdinPipe()
if err != nil {
    log.Println("Failed to create stdin pipe")
}
audioOut, err := cmd.StdoutPipe()
if err != nil {
    log.Println("Failed to create stdout pipe")
}
err = cmd.Start()
if err != nil {
    log.Println("Failed to start ffmpeg command, error: ", err)
}
go func() {
    for {
        packet := <-packets
        audioIn.Write(packet.Payload)
    }
}
go func() {
    amount, err := io.Copy(response, audioOut)
    if err != nil {
        log.Println("io copy terminated with an error", err)
    }
    log.Printf("Done copying audio data: %d bytes
", amount)
}()
err = cmd.Wait()
if err != nil {
    log.Println("ffmpeg command terminated incorrectly", err)
}