我正在与MediaMetadataRetriever斗争,因为它根本不工作,甚至我可以在Android Studio上播放视频文件。
val dancerView = findViewById<VideoView>(R.id.dancerView)
val path_vid = "android.resource://" + getPackageName() + "/" + R.raw.test_720
var intent_cam = Intent(MediaStore.ACTION_VIDEO_CAPTURE)
var mediaController = MediaController(this)
mediaController.setAnchorView(dancerView)
dancerView.setVideoPath(path_vid)
dancerView.requestFocus()
dancerView.start()
在这里我可以播放名为test_720.mp4的视频,
val vid_file = File(path_vid)
val vid_file_uri = Uri.fromFile(vid_file)
val vid_abspath =vid_file.absolutePath
Log.e("Path", path_vid)
Log.e("absPath", vid_abspath)
val meta_ret = MediaMetadataRetriever()
meta_ret.setDataSource(path_vid)
val frame_num = meta_ret.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_FRAME_COUNT)?.toInt()
val frame_rate = meta_ret.extractMetadata(MediaMetadataRetriever.METADATA_KEY_CAPTURE_FRAMERATE)?.toInt()
无论我在setDatasource而不是path_vid中输入什么,它都只显示错误:
Caused by: java.lang.IllegalArgumentException
at android.media.MediaMetadataRetriever.setDataSource(MediaMetadataRetriever.java:77)
at com.example.teamov.MainActivity.onCreate(MainActivity.kt:70)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
我不明白为什么会发生这种情况,因为我看到的其他例子说这应该可以工作。我做错了什么吗?或者视频文件不够?
2条答案
按热度按时间35g0bw711#
尝试使用android资源URI本身访问您的文件:
tyky79it2#
发现存在一种新的方法:setDataSource(链接、标题);我用这个解决了这个问题: