2 つのビデオをマージする必要があります。どちらも mp4 で、他のすべてのパラメーターは同じです。問題は、大きなサイズのファイルがある場合、それをマージできず、null ポインター例外が発生することです。これは、私が間違っていたと思うが、問題を理解できない部分です。
if (videoTracks.size() > 0) {
result.addTrack(new AppendTrack(videoTracks.toArray(new Track[videoTracks.size()])));
}
if (audioTracks.size() > 0) {
result.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));
}
//Output the resulting movie to a new mp4 file
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String outputLocation = mediaStorageDir.getPath();
Container out = new DefaultMp4Builder().build(result);
エラー：
スレッド「AWT-EventQueue-0」での例外 java.lang.NullPointerException at com.googlecode.mp4parser.boxes.mp4.ESDescriptorBox.getContentSize(ESDescriptorBox.java:60) at com.googlecode.mp4parser.AbstractBox.getSize(AbstractBox.java) :203) com.googlecode.mp4parser.BasicContainer.getContainerSize(BasicContainer.java:70) で com.coremedia.iso.boxes.sampleentry.AudioSampleEntry.getSize(AudioSampleEntry.java:330) で com.googlecode.mp4parser.BasicContainer. getContainerSize(BasicContainer.java:70) com.coremedia.iso.boxes.SampleDescriptionBox.getSize(SampleDescriptionBox.java:112) com.googlecode.mp4parser.AbstractContainerBox.getHeader(AbstractContainerBox.java:67) com.coremedia.iso .boxes.SampleDescriptionBox.getBox(SampleDescriptionBox.java:94) com.googlecode.mp4parser.authoring.track.AppendTrack.mergeStsds(AppendTrack.java:81) com.googlecode.mp4parser.authoring.tracks.AppendTrack.(AppendTrack.java:65) で Mp4.merging.merge(merging.java:90) で gui.maingui. projectRecStopBActionPerformed(maingui.java:1281) で gui.maingui.access$2000(maingui.java:60) で gui.maingui$18.actionPerformed(maingui.java:941) で javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) ) javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348) で javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) で javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) で javax java.awt.Component.processMouseEvent(Component.java:6535) で javax.swing.JComponent.processMouseEvent(JComponent.java:3324) で java.awt.Component.processEvent(Component.java:6300) で java.awt.Container.processEvent(Container.java:2236) で Java. awt.Component.dispatchEventImpl(Component.java:4891) で java.awt.Container.dispatchEventImpl(Container.java:2294) で java.awt.Component.dispatchEvent(Component.java:4713) で java.awt.LightweightDispatcher.retargetMouseEvent で(Container.java:4888) java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525) で java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466) で java.awt.Container.dispatchEventImpl(Container.java: 2280) で java.awt.Window.dispatchEventImpl(Window.java:2750) で java.awt.Component.dispatchEvent(Component.java:4713) で java.awt.EventQueue で。dispatchEventImpl(EventQueue.java:758) で java.awt.EventQueue.access$500(EventQueue.java:97) で java.awt.EventQueue$3.run(EventQueue.java:709) で java.awt.EventQueue$3.run( EventQueue.java:703) で java.security.AccessController.doPrivileged(Native Method) で java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) で java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java: 86) java.awt.EventQueue$4.run(EventQueue.java:731) で java.awt.EventQueue$4.run(EventQueue.java:729) で java.security.AccessController.doPrivileged(Native Method) で java.security .ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) java.awt.EventQueue.dispatchEvent(EventQueue.java:728) java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) で java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) で java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) でawt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) で java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) で java.awt.EventDispatchThread.run(EventDispatchThread.java:82) で101) java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) で java.awt.EventDispatchThread.run(EventDispatchThread.java:82) で101) java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) で java.awt.EventDispatchThread.run(EventDispatchThread.java:82) で
誰か助けてください！