在UPW中使用VLC解码媒体

VLC支持的格式很全，学会如何使用后，完全可以自己给自己写一个简单的万能播放器了。

源码来自github：https://github.com/kakone/VLC.MediaElement.git(想详细了解就clone自己研究下，这里只简单了解下)

安装NuGet包 libVLCX

安装NuGet包 VLC.MediaElement,并在XAML里添加引用 xmlns:vlc="using:VLC"

后台代码，选取文件并打开,选取格式为"*"，表示包含所有格式后缀

先定义字符串常量

private const string FILE_TOKEN = "{1BBC4B94-BE33-4D79-A0CB-E5C6CDB9D107}";
        private const string SUBTITLE_FILE_TOKEN = "{16BA03D6-BCA8-403E-B1E8-166B0020B4A7}";

private async void OpenFileAsync()
        {
            var file = await PickSingleFileAsync("*", FILE_TOKEN);
            if (file != null)
            {
                media_element.MediaSource = VLC.MediaSource.CreateFromUri($"winrt://{FILE_TOKEN}");
            }
        }
        private async Task<StorageFile> PickSingleFileAsync(string fileTypeFilter, string token)
        {
            var fileOpenPicker = new FileOpenPicker()
            {
                SuggestedStartLocation = PickerLocationId.VideosLibrary
            };
            fileOpenPicker.FileTypeFilter.Add(fileTypeFilter);
            var file = await fileOpenPicker.PickSingleFileAsync();
            if (file != null)
            {
                StorageApplicationPermissions.FutureAccessList.AddOrReplace(token, file);
            }
            return file;
        }

添加外部字幕文件，格式为(.srt)

private async void OpenSubtitleFileAsync()
        {
            var source = media_element.MediaSource;
            if (source == null)
            {
                return;
            }
            var file = await PickSingleFileAsync(".srt", SUBTITLE_FILE_TOKEN);
            if (file != null)
            {
                media_element.MediaSource.ExternalTimedTextSources.Add(TimedTextSource.CreateFromUri($"winrt://{SUBTITLE_FILE_TOKEN}"));
            }
        }

完整代码

<Page
    x:Class="VLCDemo.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:VLCDemo"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:vlc="using:VLC"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <vlc:MediaElement x:Name="media_element" Grid.Row="1" AreTransportControlsEnabled="True" HardwareAcceleration="True">
            
        </vlc:MediaElement>
        <Button x:Name="openFile_bt" Content="OpenFile" Style="{ThemeResource ButtonRevealStyle}" HorizontalAlignment="Left" CornerRadius="10" BorderThickness="1" Tapped="openFile_bt_Tapped"/>
        <Button x:Name="addSubTitle_bt" Content="AddSubTitle" Style="{ThemeResource ButtonRevealStyle}" HorizontalAlignment="Left" Margin="100,0,0,0" CornerRadius="10" BorderThickness="1" Tapped="addSubTitle_bt_Tapped"/>
    </Grid>
</Page>

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using VLC;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.Storage.AccessCache;
using Windows.Storage.Pickers;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x804 上介绍了“空白页”项模板

namespace VLCDemo
{
    /// <summary>
    /// 可用于自身或导航至 Frame 内部的空白页。
    /// </summary>
    public sealed partial class MainPage : Page
    {
        private const string FILE_TOKEN = "{1BBC4B94-BE33-4D79-A0CB-E5C6CDB9D107}";
        private const string SUBTITLE_FILE_TOKEN = "{16BA03D6-BCA8-403E-B1E8-166B0020B4A7}";
        public MainPage()
        {
            this.InitializeComponent();
        }

        private void openFile_bt_Tapped(object sender, TappedRoutedEventArgs e)
        {
            OpenFileAsync();
        }

        private async void OpenFileAsync()
        {
            var file = await PickSingleFileAsync("*", FILE_TOKEN);
            if (file != null)
            {
                media_element.MediaSource = VLC.MediaSource.CreateFromUri($"winrt://{FILE_TOKEN}");
            }
        }
        private async Task<StorageFile> PickSingleFileAsync(string fileTypeFilter, string token)
        {
            var fileOpenPicker = new FileOpenPicker()
            {
                SuggestedStartLocation = PickerLocationId.VideosLibrary
            };
            fileOpenPicker.FileTypeFilter.Add(fileTypeFilter);
            var file = await fileOpenPicker.PickSingleFileAsync();
            if (file != null)
            {
                StorageApplicationPermissions.FutureAccessList.AddOrReplace(token, file);
            }
            return file;
        }

        private void addSubTitle_bt_Tapped(object sender, TappedRoutedEventArgs e)
        {
            OpenSubtitleFileAsync();
        }

        private async void OpenSubtitleFileAsync()
        {
            var source = media_element.MediaSource;
            if (source == null)
            {
                return;
            }
            var file = await PickSingleFileAsync(".srt", SUBTITLE_FILE_TOKEN);
            if (file != null)
            {
                media_element.MediaSource.ExternalTimedTextSources.Add(TimedTextSource.CreateFromUri($"winrt://{SUBTITLE_FILE_TOKEN}"));
            }
        }
    }
}

demo地址:https://github.com/singhwong/uwp-vlc-demo.git