Question

我正在调试elementery Videos问题，其中外部字幕文件仅在与视频同名时加载（问题#32）。

看起来ClutterGst.Playback.set_subtitle_uri只有在文件名相同时才有效。没有错误，即使给它一个非现有的文件路径也没有。＆＃34;副标题 - ＆＃34;总是调用信号。

Gstreamer1.0本身似乎没有问题，我已用gst-launch对其进行了测试：

gst-launch-1.0 playbin uri=file:///home/peteruithoven/Videos/ed_hd_512kb.mp4 suburi=file:///home/peteruithoven/Videos/ed.srt

我已经创建了以下问题的简化示例。

namespace Test {
    public class Application : Gtk.Application {

        public GtkClutter.Embed clutter;
        private Clutter.Actor video_actor;
        private Clutter.Stage stage;
        private ClutterGst.Playback playback;

        public Application () {
            Object (
                application_id: "com.github.peteruithoven.subtitles-test",
                flags: ApplicationFlags.FLAGS_NONE
            );
        }

        protected override void activate () {

            var main_window = new Gtk.ApplicationWindow (this);
            main_window.default_height = 400;
            main_window.default_width = 500;
            main_window.title = "Hello World";

            playback = new ClutterGst.Playback ();
            playback.set_seek_flags (ClutterGst.SeekFlags.ACCURATE);
            clutter = new GtkClutter.Embed ();
            stage = (Clutter.Stage)clutter.get_stage ();
            stage.background_color = {0, 0, 0, 0};

            video_actor = new Clutter.Actor ();
            var aspect_ratio = new ClutterGst.Aspectratio ();

            ((ClutterGst.Aspectratio) aspect_ratio).paint_borders = false;
            ((ClutterGst.Content) aspect_ratio).player = playback;
            video_actor.content = aspect_ratio;

            video_actor.add_constraint (new Clutter.BindConstraint (stage, Clutter.BindCoordinate.WIDTH, 0));
            video_actor.add_constraint (new Clutter.BindConstraint (stage, Clutter.BindCoordinate.HEIGHT, 0));

            stage.add_child (video_actor);
            main_window.add (clutter);
            main_window.show_all ();

            playback.notify["subtitle-uri"].connect (() => {
                stdout.printf ("playback.notify subtitle-uri: %s\n", playback.subtitle_uri);
            });

            playback.uri = "file:///home/peteruithoven/Videos/ed_hd_512kb.mp4";
            playback.set_subtitle_uri ("file:///home/peteruithoven/Videos/ed.srt"); // doesn't work
            // playback.set_subtitle_uri ("file:///home/peteruithoven/Videos/ed_hd_512kb.srt"); // works
            playback.playing = true;
        }

        public static int main (string[] args) {

            var err = GtkClutter.init (ref args);
            if (err != Clutter.InitError.SUCCESS) {
                error ("Could not initalize clutter! "+err.to_string ());
            }

            Gst.init (ref args);

            var app = new Application ();
            return app.run (args);
        }
    }
}

回购中的此示例：https://github.com/peteruithoven/subtitles-test

如果文件名与视频文件相同，ClutterGST仅显示外部字幕

0 个答案: