custom code vlc on android - no video
我几乎得到了一个成功运行的安卓 vlc 代码示例。
我一直以 VideoPlayerActivity 为例。
目前我通过surfacehandler 显示了表面,我看到了一个黑色的视频图像背景框(SurfaceView)。我也有工作音频。
但是由于某种原因,我无法获得任何视频。
Logcat 连续说以下内容:
yuv_rgb_neon: 无法获取视频图片。
我认为这是我的代码中的一个非常小的问题。我已经尝试了几乎所有我能想到的东西,但我无法让它发挥作用。
谁能指出我正确的方向?
这是我使用的核心 libvlc 代码:我认为 init 上下文参数有问题,但我似乎无法找出它是什么。
(我与位于 org.videloan.vlc.gui.video 中的原始 VideoPlayerActivity 具有相同的表面处理程序)
1 2 3 4 5 6 7 8 9 10 11 | mLibVLC = LibVLC.getInstance(); mLibVLC.setIomx(false); mLibVLC.setSubtitlesEncoding(""); mLibVLC.setTimeStretching(false); mLibVLC.setFrameSkip(true); mLibVLC.setChroma("RV16"); mLibVLC.setVerboseMode(true); mLibVLC.setAout(-1); mLibVLC.setDeblocking(0); mLibVLC.setNetworkCaching(0); mLibVLC.init(this.getApplicationContext()); |
完整代码片段:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 | /* VideoPlayerActivity.java */ package com.example.mp2; import java.lang.reflect.Method; import org.videolan.libvlc.EventHandler; import org.videolan.libvlc.IVideoPlayer; import org.videolan.libvlc.LibVLC; import org.videolan.libvlc.LibVlcException; import org.videolan.vlc.Util; import org.videolan.vlc.WeakHandler; import android.annotation.TargetApi; import android.app.Activity; import android.content.Context; import android.content.pm.ActivityInfo; import android.content.res.Configuration; import android.graphics.ImageFormat; import android.graphics.PixelFormat; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.Display; import android.view.Surface; import android.view.SurfaceHolder; import android.view.SurfaceHolder.Callback; import android.view.SurfaceView; import android.view.View.OnSystemUiVisibilityChangeListener; import android.view.ViewGroup.LayoutParams; import android.view.WindowManager; import android.widget.FrameLayout; public class VideoPlayerActivity extends Activity implements IVideoPlayer { public final static String TAG ="VLC/VideoPlayerActivity"; // Internal intent identifier to distinguish between internal launch and // external intent. private SurfaceView mSurface; private SurfaceHolder mSurfaceHolder; private FrameLayout mSurfaceFrame; private LibVLC mLibVLC; private String mLocation; private static final int SURFACE_BEST_FIT = 0; private static final int SURFACE_FIT_HORIZONTAL = 1; private static final int SURFACE_FIT_VERTICAL = 2; private static final int SURFACE_FILL = 3; private static final int SURFACE_16_9 = 4; private static final int SURFACE_4_3 = 5; private static final int SURFACE_ORIGINAL = 6; private int mCurrentSize = SURFACE_BEST_FIT; /** Overlay */ private static final int SURFACE_SIZE = 3; // size of the video private int mVideoHeight; private int mVideoWidth; private int mVideoVisibleHeight; private int mVideoVisibleWidth; private int mSarNum; private int mSarDen; private static VideoPlayerActivity context; public static VideoPlayerActivity getContext() { return context; } /** * Used to store a selected subtitle; see onActivityResult. It is possible * to have multiple custom subs in one session (just like desktop VLC allows * you as well.) */@Override@TargetApi(Build.VERSION_CODES.HONEYCOMB) protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.player); if (Util.isICSOrLater()) getWindow().getDecorView().findViewById(android.R.id.content).setOnSystemUiVisibilityChangeListener(new OnSystemUiVisibilityChangeListener() {@Override public void onSystemUiVisibilityChange(int visibility) { setSurfaceSize(mVideoWidth, mVideoHeight, mVideoVisibleWidth, mVideoVisibleHeight, mSarNum, mSarDen); } }); mSurface = (SurfaceView) findViewById(R.id.player_surface); mSurfaceHolder = mSurface.getHolder(); mSurfaceFrame = (FrameLayout) findViewById(R.id.player_surface_frame); String chroma ="RV16"; context = this; if (Util.isGingerbreadOrLater() && chroma.equals("YV12")) { mSurfaceHolder.setFormat(ImageFormat.YV12); } else if (chroma.equals("RV16")) { mSurfaceHolder.setFormat(PixelFormat.RGB_565); } else { mSurfaceHolder.setFormat(PixelFormat.RGBX_8888); } mSurfaceHolder.addCallback(mSurfaceCallback); try { mLibVLC = LibVLC.getInstance(); mLibVLC.setIomx(false); mLibVLC.setSubtitlesEncoding(""); mLibVLC.setTimeStretching(false); mLibVLC.setFrameSkip(true); mLibVLC.setChroma("RV16"); mLibVLC.setVerboseMode(true); mLibVLC.setAout(-1); mLibVLC.setDeblocking(0); mLibVLC.setNetworkCaching(0); mLibVLC.init(this.getApplicationContext()); } catch (LibVlcException e) { // TODO Auto-generated catch block e.printStackTrace(); } EventHandler em = EventHandler.getInstance(); em.addHandler(eventHandler); } @Override protected void onStart() { super.onStart(); } @Override protected void onPause() { super.onPause(); mLibVLC.stop(); mSurface.setKeepScreenOn(false); } @Override protected void onStop() { super.onStop(); } @Override protected void onDestroy() { super.onDestroy(); if (mLibVLC != null) { mLibVLC.stop(); } } @Override protected void onResume() { super.onResume(); load(); } private final Handler eventHandler = new VideoPlayerEventHandler(this); private static class VideoPlayerEventHandler extends WeakHandler < VideoPlayerActivity > { public VideoPlayerEventHandler(VideoPlayerActivity owner) { super(owner); } @Override public void handleMessage(Message msg) { VideoPlayerActivity activity = getOwner(); if (activity == null) return; switch (msg.getData().getInt("event")) { case EventHandler.MediaPlayerPlaying: Log.i(TAG,"MediaPlayerPlaying"); // activity.setESTracks(); // activity.setESTracks(); break; case EventHandler.MediaPlayerPaused: Log.i(TAG,"MediaPlayerPaused"); break; case EventHandler.MediaPlayerStopped: Log.i(TAG,"MediaPlayerStopped"); break; case EventHandler.MediaPlayerEndReached: Log.i(TAG,"MediaPlayerEndReached"); // activity.endReached(); break; case EventHandler.MediaPlayerVout: // activity.handleVout(msg); break; case EventHandler.MediaPlayerPositionChanged: // don't spam the logs break; case EventHandler.MediaPlayerEncounteredError: Log.i(TAG,"MediaPlayerEncounteredError"); // activity.encounteredError(); break; default: Log.e(TAG, String.format("Event not handled (0x%x)", msg.getData().getInt("event"))); break; } // activity.updateOverlayPausePlay(); } }; private final Handler mHandler = new VideoPlayerHandler(this); private static class VideoPlayerHandler extends WeakHandler < VideoPlayerActivity > { public VideoPlayerHandler(VideoPlayerActivity owner) { super(owner); } @Override public void handleMessage(Message msg) { VideoPlayerActivity activity = getOwner(); if (activity == null) // WeakReference could be GC'ed early return; switch (msg.what) { case SURFACE_SIZE: activity.changeSurfaceSize(); break; } } }; @Override public void setSurfaceSize(int width, int height, int visible_width, int visible_height, int sar_num, int sar_den) { if (width * height == 0) return; // store video size mVideoHeight = height; mVideoWidth = width; mVideoVisibleHeight = visible_height; mVideoVisibleWidth = visible_width; mSarNum = sar_num; mSarDen = sar_den; Message msg = mHandler.obtainMessage(SURFACE_SIZE); mHandler.sendMessage(msg); } private void changeSurfaceSize() { // get screen size int dw = getWindow().getDecorView().getWidth(); int dh = getWindow().getDecorView().getHeight(); // getWindow().getDecorView() doesn't always take orientation into // account, we have to correct the values boolean isPortrait = getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT; if (dw > dh && isPortrait || dw < dh && !isPortrait) { int d = dw; dw = dh; dh = d; } // sanity check if (dw * dh == 0 || mVideoWidth * mVideoHeight == 0) { Log.e(TAG,"Invalid surface size"); return; } // compute the aspect ratio double ar, vw; double density = (double) mSarNum / (double) mSarDen; if (density == 1.0) { /* No indication about the density, assuming 1:1 */ vw = mVideoVisibleWidth; ar = (double) mVideoVisibleWidth / (double) mVideoVisibleHeight; } else { /* Use the specified aspect ratio */ vw = mVideoVisibleWidth * density; ar = vw / mVideoVisibleHeight; } // compute the display aspect ratio double dar = (double) dw / (double) dh; switch (mCurrentSize) { case SURFACE_BEST_FIT: if (dar < ar) dh = (int)(dw / ar); else dw = (int)(dh * ar); break; case SURFACE_FIT_HORIZONTAL: dh = (int)(dw / ar); break; case SURFACE_FIT_VERTICAL: dw = (int)(dh * ar); break; case SURFACE_FILL: break; case SURFACE_16_9: ar = 16.0 / 9.0; if (dar < ar) dh = (int)(dw / ar); else dw = (int)(dh * ar); break; case SURFACE_4_3: ar = 4.0 / 3.0; if (dar < ar) dh = (int)(dw / ar); else dw = (int)(dh * ar); break; case SURFACE_ORIGINAL: dh = mVideoVisibleHeight; dw = (int) vw; break; } // force surface buffer size // mSurfaceHolder.setFixedSize(mVideoWidth, mVideoHeight); // set display size LayoutParams lp = mSurface.getLayoutParams(); lp.width = dw * mVideoWidth / mVideoVisibleWidth; lp.height = dh * mVideoHeight / mVideoVisibleHeight; mSurface.setLayoutParams(lp); // set frame size (crop if necessary) lp = mSurfaceFrame.getLayoutParams(); lp.width = dw; lp.height = dh; mSurfaceFrame.setLayoutParams(lp); mSurface.invalidate(); } private final SurfaceHolder.Callback mSurfaceCallback = new Callback() {@Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { if (format == PixelFormat.RGBX_8888) Log.d(TAG,"Pixel format is RGBX_8888"); else if (format == PixelFormat.RGB_565) Log.d(TAG,"Pixel format is RGB_565"); else if (format == ImageFormat.YV12) Log.d(TAG,"Pixel format is YV12"); else Log.d(TAG,"Pixel format is other/unknown"); mLibVLC.attachSurface(holder.getSurface(), VideoPlayerActivity.this, width, height); } @Override public void surfaceCreated(SurfaceHolder holder) {} @Override public void surfaceDestroyed(SurfaceHolder holder) { mLibVLC.detachSurface(); } }; /** * External extras: - position (long) - position of the video to start with * (in ms) */ private void load() { mLocation ="file:///sdcard/fam.mp4"; mSurface.setKeepScreenOn(true); // MediaList mediaList = new MediaList(mLibVLC); // mLibVLC.setMediaList(); mLibVLC.readMedia(mLocation, false); mLibVLC.setTime(0); mLibVLC.play(); } @SuppressWarnings("deprecation") private int getScreenRotation() { WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE); Display display = wm.getDefaultDisplay(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO /* * Android 2.2 * has * getRotation */ ) { try { Method m = display.getClass().getDeclaredMethod("getRotation"); return (Integer) m.invoke(display); } catch (Exception e) { return Surface.ROTATION_0; } } else { return display.getOrientation(); } } @TargetApi(Build.VERSION_CODES.GINGERBREAD) private int getScreenOrientation() { WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE); Display display = wm.getDefaultDisplay(); int rot = getScreenRotation(); /* * Since getRotation() returns the screen's"natural" orientation, which * is not guaranteed to be SCREEN_ORIENTATION_PORTRAIT, we have to * invert the SCREEN_ORIENTATION value if it is"naturally" landscape. */@SuppressWarnings("deprecation") boolean defaultWide = display.getWidth() > display.getHeight(); if (rot == Surface.ROTATION_90 || rot == Surface.ROTATION_270) defaultWide = !defaultWide; if (defaultWide) { switch (rot) { case Surface.ROTATION_0: return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; case Surface.ROTATION_90: return ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; case Surface.ROTATION_180: // SCREEN_ORIENTATION_REVERSE_PORTRAIT only available since API // Level 9+ return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO ? ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); case Surface.ROTATION_270: // SCREEN_ORIENTATION_REVERSE_LANDSCAPE only available since API // Level 9+ return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO ? ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT : ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); default: return 0; } } else { switch (rot) { case Surface.ROTATION_0: return ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; case Surface.ROTATION_90: return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; case Surface.ROTATION_180: // SCREEN_ORIENTATION_REVERSE_PORTRAIT only available since API // Level 9+ return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO ? ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT : ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); case Surface.ROTATION_270: // SCREEN_ORIENTATION_REVERSE_LANDSCAPE only available since API // Level 9+ return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO ? ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); default: return 0; } } } } |
在对 Android 版 VLC 进行故障排除时,您会在他们的论坛中找到很多有用的信息:
VLC for Android VideoLAN 论坛
在初始化 mLibVLC 之前,您缺少两个选项。它们是:
mLibVLC.setHardwareAcceleration(LibVLC.HW_ACCELERATION_FULL);
mLibVLC.eventVideoPlayerActivityCreated(Boolean.TRUE);
没有这些,您的视频将不会显示,或者您的 SurfaceView 会显示绿屏。因此,在您的 VLC 活动的 onCreate 中,要正确显示视频,您可以使用以下内容(假设您的 SurfaceView 设置为正确的大小):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | mSurfaceView = (SurfaceView) findViewById(R.id.player_surface); mSurfaceHolder = mSurfaceView.getHolder(); mSurfaceFrame = (FrameLayout) findViewById(R.id.player_surface_frame); mMediaUrl = getIntent().getExtras().getString("videoUrl"); try { mLibVLC = LibVLC.getInstance(); mLibVLC.setAout(mLibVLC.AOUT_AUDIOTRACK); mLibVLC.setVout(mLibVLC.VOUT_ANDROID_SURFACE); mLibVLC.setHardwareAcceleration(LibVLC.HW_ACCELERATION_FULL); mLibVLC.eventVideoPlayerActivityCreated(Boolean.TRUE); mLibVLC.init(getApplicationContext()); } catch (LibVlcException e){ Log.e(TAG, e.toString()); } mSurfaceHolder.addCallback(mSurfaceCallback); mSurface = mSurfaceHolder.getSurface(); mLibVLC.attachSurface(mSurface, VideoVLCActivity.this); mLibVLC.playMRL(mMediaUrl); |
旁注,任何人都可以在他们的 build.gradle 中使用以下内容,而不是自己编译和添加 vlc 库:
1 | compile"de.mrmaffen:vlc-android-sdk:1.0.3" |