Youtube 使用 GStreamer

參考 How to watch Youtube videos with Gstreamer

安裝

$ pip install youtube-dl

取得可用格式

$ youtube-dl --list-formats youtube_link

取得 url

$ youtube-dl --format mp4 --get-url youtube_link

利用 GStreamer 撥放

$ gst-launch-1.0 playbin uri="$(youtube-dl --format mp4 --get-url youtube_link)"

在程式中利用 youtube-dl

    GError *error = NULL;

    GSubprocess *youtube_dl = g_subprocess_new (G_SUBPROCESS_FLAGS_STDOUT_PIPE, &error, 

        "/home/nano/.local/bin/youtube-dl", 

        //"--format", "mp4",

        "-f", "18",

        //"--get-url", "https://www.youtube.com/watch?v=gMd8bLJLsiw", 

        "--get-url", "https://www.youtube.com/watch?v=2P_74GLABBY", 

        NULL);

    if (error) {

      g_error ("Could Not Launch Sub-Proess youtube-dl");

      return -1;

    }

    GInputStream *istream = g_subprocess_get_stdout_pipe (youtube_dl);

    gchar buffer[1024];

    gssize urlSize = g_input_stream_read(istream, buffer, sizeof(buffer), NULL, &error);

    if (error || urlSize == sizeof(buffer)) {

      g_print("error g_input_stream_read\n");

      return -1;

    }

    buffer[urlSize] = 0;

    g_print("youtube_dl:uri %s\n", buffer);

    /* Set the URI to play */

    g_object_set (data.playbin, "uri", buffer, NULL);