Android Code Snippet [B4X] YouTube Streaming Library

Sergio Haurat · Jun 23, 2024

I want to clarify that my language is Spanish, I understand English without problems but I don't speak it fluently and to write this post I am using Google Translate. That explains some grammatical inconsistencies.

I need to integrate streaming capability into an application, similar to SportCam, for streaming to YouTube. I already have OAuth2 authentication implemented (developed by @Erel) and I have made progress in these methods.

CreateLiveStream
CreateLiveBroadcast
ListLiveBroadcasts
BindLiveStreamToBroadcast
StartLiveBroadcast

The next methods are not complete; they are just a sample.

Create a new live stream:

Public Sub CreateLiveStream(title As String, description As String, scheduledStartTime As String) As ResumableSub
  Dim streamData As Map
  streamData.Initialize
  streamData.Put("snippet", CreateSnippet(title, description, scheduledStartTime))
  streamData.Put("status", CreateStatus("public"))
  streamData.Put("cdn", CreateCdn("1080p"))
  Dim objHJ As HttpJob
  objHJ.Initialize("", Me)
  objHJ.PostString(STREAM_URL, CreateJson(streamData))
  objHJ.GetRequest.SetContentType("application/json")
  objHJ.GetRequest.SetHeader("Authorization", "Bearer " & Token)
  Wait For (objHJ) JobDone(objHJ As HttpJob)
  If objHJ.Success Then
    Log("Live Stream Created: " & objHJ.GetString)
    Return objHJ.GetString
  Else
    Log("Error: " & objHJ.ErrorMessage)
    Return ""
  End If
End Sub

List live broadcasts with a specific status, max results, and other optional parameters:

Public Sub ListLiveBroadcasts(status As String, part As String, maxResults As Int, broadcastType As String, id As String, mine As Boolean, pageToken As String) As ResumableSub
  Dim objHJ As HttpJob
  objHJ.Initialize("", Me)
  objHJ.Download(url)
  objHJ.GetRequest.SetHeader("Authorization", "Bearer " & Token)
  Wait For (objHJ) JobDone(objHJ As HttpJob)
  If objHJ.Success Then
    Log("Live Broadcasts: " & objHJ.GetString)
    Return ParseBroadcasts(objHJ.GetString)
  Else
    Log("Error: " & objHJ.ErrorMessage)
    Return ""
  End If
End Sub

In the case of ListLiveBroadcasts, this is the result of a query for one record.

Call ListLiveBroadcasts example:

Private Sub Button1_Click
'    mOAuth2.ResetToken
    mOAuth2.GetAccessToken
    Wait For OAuth2_AccessTokenAvailable (Success As Boolean, Token As String)
    If Not (Success) Then
        Log("Error accessing account.")
        Return
    End If
    mYouTubeAPI.Initialize
    mYouTubeAPI.API_KEY = "AIza****************************cfwRG9o"
    mYouTubeAPI.SetToken(Token)
    Wait For (mYouTubeAPI.ListLiveBroadcasts("all", "contentDetails", 1, "", "", False, "")) Complete (StreamResponse As JSON)
    Log("List of Broadcast: " & CRLF & StreamResponse)
End Sub

JSON:

{
  "kind": "youtube#liveBroadcastListResponse",
  "etag": "tgzQi_e3c2YOIsxzLEpnFyyEePk",
  "nextPageToken": "CAEQAA",
  "pageInfo": {
    "totalResults": 485,
    "resultsPerPage": 1
  },
  "items": [
    {
      "kind": "youtube#liveBroadcast",
      "etag": "4Ya1PyMGwBND7YfLvGYSGKQJRJs",
      "id": "F5HZAAVqmGg",
      "snippet": {
        "publishedAt": "2024-03-02T16:46:53Z",
        "channelId": "UCJXh-TMEuZbsmPTHzWp-fxw",
        "title": "Handball Femenino (primera) 02/03/2024 - ASAMBAL vs. Argentinos Juniors (vivo)",
        "description": "#PasSportsAr\n\n#Handball #Håndbold #Håndball #Handboll #Kézilabda #Rokomet #Rukomet #Handebol #PiłkaRęczna #Handbolti #Balonmano #Pallamano #كرة_اليد #Handbol #Handbold #Гандбол #Χάντμπολ #ハンドボール #핸드볼 #手球 #Håndbold #Hándbol\n\n#Sport #Šport #Esporte #Íþrótt #رياضة #Спорт #Αθλητισμός #スポーツ #스포츠 #运动 #Deporte",
        "thumbnails": {
          "default": {
            "url": "https://i.ytimg.com/vi/F5HZAAVqmGg/default.jpg",
            "width": 120,
            "height": 90
          },
          "medium": {
            "url": "https://i.ytimg.com/vi/F5HZAAVqmGg/mqdefault.jpg",
            "width": 320,
            "height": 180
          },
          "high": {
            "url": "https://i.ytimg.com/vi/F5HZAAVqmGg/hqdefault.jpg",
            "width": 480,
            "height": 360
          },
          "standard": {
            "url": "https://i.ytimg.com/vi/F5HZAAVqmGg/sddefault.jpg",
            "width": 640,
            "height": 480
          },
          "maxres": {
            "url": "https://i.ytimg.com/vi/F5HZAAVqmGg/maxresdefault.jpg",
            "width": 1280,
            "height": 720
          }
        },
        "scheduledStartTime": "2024-03-02T18:30:00Z",
        "actualStartTime": "2024-03-02T18:31:48Z",
        "actualEndTime": "2024-03-02T19:55:17Z",
        "isDefaultBroadcast": false,
        "liveChatId": "KicKGFVDSlhoLVRNRXVaYnNtUFRIeldwLWZ4dxILRjVIWkFBVnFtR2c"
      },
      "status": {
        "lifeCycleStatus": "complete",
        "privacyStatus": "public",
        "recordingStatus": "recorded",
        "madeForKids": false,
        "selfDeclaredMadeForKids": false
      },
      "contentDetails": {
        "boundStreamId": "JXh-TMEuZbsmPTHzWp-fxw1684655197397122",
        "boundStreamLastUpdateTimeMs": "2024-03-02T19:55:04Z",
        "monitorStream": {
          "enableMonitorStream": true,
          "broadcastStreamDelayMs": 0,
          "embedHtml": "\u003ciframe width=\"425\" height=\"344\" src=\"https://www.youtube.com/embed/F5HZAAVqmGg?autoplay=1&livemonitor=1\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c/iframe\u003e"
        },
        "enableEmbed": true,
        "enableDvr": true,
        "enableContentEncryption": false,
        "recordFromStart": true,
        "enableClosedCaptions": false,
        "closedCaptionsType": "closedCaptionsDisabled",
        "enableLowLatency": false,
        "latencyPreference": "normal",
        "projection": "rectangular",
        "enableAutoStart": false,
        "enableAutoStop": false
      }
    }
  ]
}

If you've read this far and are interested in developing this library together, I'd be happy to do so. My intention is not to sell the library; of course, donations will be accepted. The most challenging part for me right now is opening the camera, capturing the video, and streaming it to YouTube.

Experimental code, not working:

Public Sub SendFileToLiveStream(filePath As String, streamId As String) As ResumableSub
    Dim objHJ As HttpJob
    objHJ.Initialize("", Me)
    Dim rtmpServerUrl As String = "rtmp://example.com/live"
    Dim fileUrl As String = "file://" & filePath
    Dim command As String = $"ffmpeg -re -i ${fileUrl} -c:v copy -c:a aac -strict experimental -f flv ${rtmpServerUrl}/${streamId}"$
    Dim shell As Shell
    shell.Initialize
    shell.RunNativeCommand(command, Null, Null)
    Return "Streaming file to live stream"
End Sub

' Clase FFmpegWrapper
Sub Class FFmpegWrapper
  Private ffmpegPath As String
  Public Sub Initialize
    ffmpegPath = File.Combine(File.DirAssets, "ffmpeg")
  End Sub
 
  Public Sub ExecuteFFmpegCommand(Command As String, Callback As Object, EventName As String)
    Dim p As Phone
    Dim cmd As String = $"${ffmpegPath} ${Command}"$
    Dim output As StringBuilder
    Dim success As Boolean
    output.Initialize
    success = p.Shell(cmd, Null, output, output)
    If success Then
      CallSubDelayed(Callback, EventName & "_Success", output.ToString)
    Else
      CallSubDelayed(Callback, EventName & "_Failure", output.ToString)
    End If
  End Sub
End Class

Android Code Snippet [B4X] YouTube Streaming Library

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