VideoPlayer

Description

将视频内容播放到目标上。

Content can be either a VideoClip imported asset or a URL such as file:// or http://. Video content will be projected onto one of the supported targets, such as camera background or RenderTexture. If the video content includes transparency, this transparency will be present in the target, allowing objects behind the video target to be visible. When the data VideoPlayer.source is set to URL, the audio and video description of what is being played will only be initialized once the VideoPlayer preparation is completed. This can be tested with VideoPlayer.isPrepared.

电影文件格式支持说明

VideoPlayer 在其实现中使用原生音频和视频解码库，您有责任使用符合目标平台要求的视频。VideoClipImporter 提供了一个将 VideoClip 资源转码为 H.264 或 VP8 视频编解码器的选项，以及一些实验性选项（例如 Resolution）。这会将匹配的编解码器用于音频轨道：分别是 AAC 和 Vorbis。

另请参阅：VideoClipImporter.SetTargetSettings 和 VideoImporterTargetSettings.enableTranscoding。

您可以选择忽略此转码，而是改用已知受目标系统支持的视频，同时使用外部程序更精确地控制编码过程。在使用过程中，VideoClipImporter 编辑器会提供指导和警告，以更好地帮助您做出正确的格式和编码选择。

For now, vendor recommendations must be followed, and are especially constrained on older mobile platforms. For example, videos you find on the web will often require inspection and manipulations before they can be used reliably in the context of a game running on multiple devices. The following are examples of recommendations and known limitations:

* Android: Supported Media Formats. See additional notes below.
* Windows: H.264 Video Decoder (see Format Constraints)
* iPhone 6-7: Compare iPhone Models (see TV and Video)

可用于硬件加速的本机支持的最优视频编解码器是 H.264，同时 VP8 作为可以在需要时使用的软件解码解决方案。在 Android 上，VP8 还支持使用本机库，因此也可以根据型号对硬件进行辅助。要在编码参数中查找的键值：

* Video Codec: H.264 or VP8.
* Resolution: For example: 1280 x 720.
* Profile: Applicable for H.264. The profile is a set of capabilities and constraints; vendors often specify this, such as "Baseline" or "Main". See here.
* Profile Level: Applicable for H.264. Within a given profile, the level specifies certain performance requirements such as "Baseline 3.1". See here.
* Audio Codec: Typically AAC (with mp4 videos using H.264) or Vorbis (with webm videos using VP8).
* Audio Channels: depends on platform. For example, the Android recommendation is for stereo files, but many devices will accept 5.1.

关于 Android 的注意事项

* Support for resolutions above 640 x 360 is not available on all devices. Runtime checks are done to verify this and failures will cause the movie to not be played.
* For Jelly Bean/MR1, movies above 1280 x 720 or with more than 2 audio tracks will not be played due to bugs in the OS libraries.
* For Lollipop and above, any resolution or number of audio channels may be attempted, but will be constrained by device capabilities.
* The Vulkan graphics API is not yet supported.
* Format compatibility issues are reported in the adb logcat output and are always prefixed with AndroidVideoMedia.
* Also pay attention to device-specific error messages located near Unity's error messages: they are not available to the engine, but often explain what the compatibility issue is.
* Playback from asset bundles is only supported for uncompressed bundles, read directly from disk.

以下部分演示了 VideoPlayer 的一些功能：

// Examples of VideoPlayer function

using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        // Will attach a VideoPlayer to the main camera.
        GameObject camera = GameObject.Find("Main Camera");

        // VideoPlayer automatically targets the camera backplane when it is added
        // to a camera object, no need to change videoPlayer.targetCamera.
        var videoPlayer = camera.AddComponent<UnityEngine.Video.VideoPlayer>();

        // Play on awake defaults to true. Set it to false to avoid the url set
        // below to auto-start playback since we're in Start().
        videoPlayer.playOnAwake = false;

        // By default, VideoPlayers added to a camera will use the far plane.
        // Let's target the near plane instead.
        videoPlayer.renderMode = UnityEngine.Video.VideoRenderMode.CameraNearPlane;

        // This will cause our Scene to be visible through the video being played.
        videoPlayer.targetCameraAlpha = 0.5F;

        // Set the video to play. URL supports local absolute or relative paths.
        // Here, using absolute.
        videoPlayer.url = "/Users/graham/movie.mov";

        // Skip the first 100 frames.
        videoPlayer.frame = 100;

        // Restart from beginning when done.
        videoPlayer.isLooping = true;

        // Each time we reach the end, we slow down the playback by a factor of 10.
        videoPlayer.loopPointReached += EndReached;

        // Start playback. This means the VideoPlayer may have to prepare (reserve
        // resources, pre-load a few frames, etc.). To better control the delays
        // associated with this preparation one can use videoPlayer.Prepare() along with
        // its prepareCompleted event.
        videoPlayer.Play();
    }

    void EndReached(UnityEngine.Video.VideoPlayer vp)
    {
        vp.playbackSpeed = vp.playbackSpeed / 10.0F;
    }
}

MovieTexture Migration Notes

Since the VideoPlayer is fundamentally different from the legacy movie playback solution MovieTexture, we are providing a few examples to help you migrate your project using MovieTexture to the new VideoPlayer solution.

Playing the Movie Example :

MovieTexture :

using UnityEngine;

public class PlayMovieMT : MonoBehaviour
{
    public AudioClip movieAudioClip;
    public MovieTexture movieTexture;

    void Start()
    {
        var audioSource = gameObject.AddComponent<AudioSource>();
        audioSource.clip = movieAudioClip;
    }

    void Update()
    {
        if (Input.GetButtonDown("Jump"))
        {
            var audioSource = GetComponent<AudioSource>();
            GetComponent<Renderer>().material.mainTexture = movieTexture;

            if (movieTexture.isPlaying)
            {
                movieTexture.Pause();
                audioSource.Pause();
            }
            else
            {
                movieTexture.Play();
                audioSource.Play();
            }
        }
    }
}

VideoPlayer :

using UnityEngine;

public class PlayMovieVP : MonoBehaviour
{
    public UnityEngine.Video.VideoClip videoClip;

    void Start()
    {
        var videoPlayer = gameObject.AddComponent<UnityEngine.Video.VideoPlayer>();
        var audioSource = gameObject.AddComponent<AudioSource>();

        videoPlayer.playOnAwake = false;
        videoPlayer.clip = videoClip;
        videoPlayer.renderMode = UnityEngine.Video.VideoRenderMode.MaterialOverride;
        videoPlayer.targetMaterialRenderer = GetComponent<Renderer>();
        videoPlayer.targetMaterialProperty = "_MainTex";
        videoPlayer.audioOutputMode = UnityEngine.Video.VideoAudioOutputMode.AudioSource;
        videoPlayer.SetTargetAudioSource(0, audioSource);
    }

    void Update()
    {
        if (Input.GetButtonDown("Jump"))
        {
            var vp = GetComponent<UnityEngine.Video.VideoPlayer>();

            if (vp.isPlaying)
            {
                vp.Pause();
            }
            else
            {
                vp.Play();
            }
        }
    }
}

Downloading a Movie Example :

MovieTexture :

using UnityEngine;

public class DownloadMovieMT : MonoBehaviour
{
    void Start()
    {
        StartCoroutine(GetMovieTexture());
    }

    IEnumerator GetMovieTexture()
    {
        using (var uwr = UnityWebRequestMultimedia.GetMovieTexture("http://myserver.com/mymovie.ogv"))
        {
            yield return uwr.SendWebRequest();
            if (uwr.isNetworkError || uwr.isHttpError)
            {
                Debug.LogError(uwr.error);
                yield break;
            }

            MovieTexture movie = DownloadHandlerMovieTexture.GetContent(uwr);

            GetComponent<Renderer>().material.mainTexture = movie;
            movie.loop = true;
            movie.Play();
        }
    }
}

VideoPlayer :

using UnityEngine;

public class DownloadMovieVP : MonoBehaviour
{
    void Start()
    {
        var vp = gameObject.AddComponent<UnityEngine.Video.VideoPlayer>();
        vp.url = "http://myserver.com/mymovie.mp4";

        vp.isLooping = true;
        vp.renderMode = UnityEngine.Video.VideoRenderMode.MaterialOverride;
        vp.targetMaterialRenderer = GetComponent<Renderer>();
        vp.targetMaterialProperty = "_MainTex";

        vp.Play();
    }
}

Static Variables

Variables

Public Functions

Events

Delegates

Inherited members