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Sur d’autres sites (8845)
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Command does not complete when executed through a .NET Process ?
7 mai 2014, par Abe MiesslerI am using ffmpeg to convert audio files. If I do it through the command line like so :
ffmpeg -i sourceAudio.wma -f mp3 destAudio.mp3it works fine. But when I attempt to do the same thing in a .net application using a Process, ffmpeg starts (and is visible as a running process in my task manager), but never completes. My .NET code never executes past the "WaitForExit" portion unless I go into my task manager and kill the process manually. Code :
using(Process process = new Process())
{
process.StartInfo.RedirectStandardOutput = true;
//process.StartInfo.RedirectStandardError = true;
process.StartInfo.FileName = Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName) + @"\ffmpeg.exe";
File.Copy(OrigFilePath, LocalFileName, true);
System.Diagnostics.EventLog.WriteEntry("ASP.NET 2.0.50727.0", "Copied file from: " + OrigFilePath + System.Environment.NewLine + "to: " + LocalFileName);
process.StartInfo.Arguments = String.Format(@"-i ""{0}"" -f mp3 ""{1}""",
LocalFileName,
tempDirectory + NewFileName);
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = false;
process.Start();
System.Diagnostics.EventLog.WriteEntry("ASP.NET 2.0.50727.0", "After start...");
string output = process.StandardOutput.ReadToEnd() + System.Environment.NewLine + process.StandardError.ReadToEnd();
process.WaitForExit(); //<------------------------------ stalls here
System.Diagnostics.EventLog.WriteEntry("ASP.NET 2.0.50727.0", "Conversion completed! Copying file from: " + LocalConvertedFile + System.Environment.NewLine + OrigFileFolder + "\\" + NewFileName);
File.Copy(LocalConvertedFile, OrigFileFolder + "\\" + NewFileName,true);
File.Delete(LocalFileName);
File.Delete(LocalConvertedFile);
sw.Stop();
System.Diagnostics.EventLog.WriteEntry("ASP.NET 2.0.50727.0", "Conversion complete. Elapsed time in seconds: " + sw.ElapsedMilliseconds/1000);
return true;
}Does anyone know why the process isn’t exiting like it does in the command line ?
-
when i record video with javacv it comes "java.lang.NoClassDefFoundError : org.bytedeco.javacpp.avutil"
9 avril 2020, par Pradeep SimbaI make a video recorder android app with javacv.
But, when i run this app this error occurs "java.lang.NoClassDefFoundError : org.bytedeco.javacpp.avutil".



How can I solve this error ?



gradle.build file



android {
 ..............
 packagingOptions {
 exclude 'META-INF/services/javax.annotation.processing.Processor'
 pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
 pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
 pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
 pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
 }
}

dependencies {

implementation group: 'org.bytedeco', name: 'javacv', version: '1.1'
implementation group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-arm'
implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-arm'
implementation group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-x86'
implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-x86'

}



My demo code VideoService which will invoke in MainActivity



package com.fs.fs.api;

import com.fs.fs.App;
import com.fs.fs.utils.DateUtils;
import com.fs.fs.utils.FileUtils;

import org.bytedeco.javacpp.avcodec;
import org.bytedeco.javacv.FFmpegFrameRecorder;
import org.bytedeco.javacv.FrameRecorder;

import java.util.Date;

/**
 * Created by wyx on 2017/1/11.
 */
public class VideoService {
 private FFmpegFrameRecorder mFrameRecorder;
 private String path;

 private VideoService() {
 }

 private static class SingletonHolder {
 private static final VideoService INSTANCE = new VideoService();
 }

 public static VideoService getInstance() {
 return SingletonHolder.INSTANCE;
 }

 public void startRecordVideo() {
 String fileName = String.format("%s.%s", DateUtils.date2String(new Date(), "yyyyMMdd_HHmmss"), "mp4");
 path = FileUtils.getExternalFullPath(App.getInstance(), fileName);
 mFrameRecorder = new FFmpegFrameRecorder(path, 640, 480, 1);
 mFrameRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
 mFrameRecorder.setVideoOption("tune", "zerolatency");
 mFrameRecorder.setVideoOption("preset", "ultrafast");
 mFrameRecorder.setVideoOption("crf", "28");
 mFrameRecorder.setVideoBitrate(300 * 1000);
 mFrameRecorder.setFormat("mp4");

 mFrameRecorder.setFrameRate(30);
 mFrameRecorder.setAudioOption("crf", "0");
 mFrameRecorder.setSampleRate(48 * 1000);
 mFrameRecorder.setAudioBitrate(960 * 1000);
 mFrameRecorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
 try {
 mFrameRecorder.start();
 } catch (FrameRecorder.Exception e) {
 e.printStackTrace();
 }
 }

 public void stop() {
 if (mFrameRecorder != null) {
 try {
 mFrameRecorder.stop();
 mFrameRecorder.release();
 } catch (FrameRecorder.Exception e) {
 e.printStackTrace();
 }
 mFrameRecorder = null;
 }
 }

}



MainActivity



package com.fs.fs.activity;

import android.app.Activity;
import android.os.Bundle;

import com.fs.fs.R;
import com.fs.fs.api.VideoService;

import static java.lang.Thread.sleep;


public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);


 VideoService.getInstance().startRecordVideo();
 try {
 sleep(10 * 1000);
 } catch (InterruptedException e) {
 e.printStackTrace();
 }
 VideoService.getInstance().stop();
 }
}



Error



E/AndroidRuntime: FATAL EXCEPTION: main
 Process: com.example.usb, PID: 660
 java.lang.NoClassDefFoundError: org.bytedeco.javacpp.avutil
 at org.bytedeco.javacpp.Loader.load(Loader.java:590)
 at org.bytedeco.javacpp.Loader.load(Loader.java:530)
 at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694)
 at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)
 at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34)
 at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75)
 at android.app.Activity.performCreate(Activity.java:5304)
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331)
 at android.app.ActivityThread.access$1000(ActivityThread.java:143)
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
 at android.os.Handler.dispatchMessage(Handler.java:102)
 at android.os.Looper.loop(Looper.java:136)
 at android.app.ActivityThread.main(ActivityThread.java:5291)
 at java.lang.reflect.Method.invokeNative(Native Method)
 at java.lang.reflect.Method.invoke(Method.java:515)
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
 at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassNotFoundException: org.bytedeco.javacpp.avutil
 at java.lang.Class.classForName(Native Method)
 at java.lang.Class.forName(Class.java:251)
 at org.bytedeco.javacpp.Loader.load(Loader.java:585)
 at org.bytedeco.javacpp.Loader.load(Loader.java:530) 
 at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694) 
 at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149) 
 at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34) 
 at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75) 
 at android.app.Activity.performCreate(Activity.java:5304) 
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090) 
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245) 
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331) 
 at android.app.ActivityThread.access$1000(ActivityThread.java:143) 
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
 at android.os.Handler.dispatchMessage(Handler.java:102) 
 at android.os.Looper.loop(Looper.java:136) 
 at android.app.ActivityThread.main(ActivityThread.java:5291) 
 at java.lang.reflect.Method.invokeNative(Native Method) 
 at java.lang.reflect.Method.invoke(Method.java:515) 
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
 at dalvik.system.NativeStart.main(Native Method) 
 Caused by: java.lang.NoClassDefFoundError: org/bytedeco/javacpp/avutil
 at java.lang.Class.classForName(Native Method) 
 at java.lang.Class.forName(Class.java:251) 
 at org.bytedeco.javacpp.Loader.load(Loader.java:585) 
 at org.bytedeco.javacpp.Loader.load(Loader.java:530) 
 at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694) 
 at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149) 
 at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34) 
 at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75) 
 at android.app.Activity.performCreate(Activity.java:5304) 
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090) 
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245) 
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331) 
 at android.app.ActivityThread.access$1000(ActivityThread.java:143) 
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
 at android.os.Handler.dispatchMessage(Handler.java:102) 
 at android.os.Looper.loop(Looper.java:136) 
 at android.app.ActivityThread.main(ActivityThread.java:5291) 
 at java.lang.reflect.Method.invokeNative(Native Method) 
 at java.lang.reflect.Method.invoke(Method.java:515) 
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
 at dalvik.system.NativeStart.main(Native Method) 
 Caused by: java.lang.ClassNotFoundException: Didn't find class "org.bytedeco.javacpp.avutil" on path: DexPathList[[zip file "/data/app/com.fs.fs-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.fs.fs-2, /vendor/lib, /system/lib, /data/datalib]]
 at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
 at java.lang.Class.classForName(Native Method) 
 at java.lang.Class.forName(Class.java:251) 
 at org.bytedeco.javacpp.Loader.load(Loader.java:585) 
 at org.bytedeco.javacpp.Loader.load(Loader.java:530) 
 at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1694) 
 at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149) 
 at com.fs.fs.api.VideoService.startRecordVideo(VideoService.java:34) 
 at com.fs.fs.activity.MainActivity.onCreate(MainActivity.java:75) 
 at android.app.Activity.performCreate(Activity.java:5304) 
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090) 
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245) 
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2331) 
 at android.app.ActivityThread.access$1000(ActivityThread.java:143) 
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
 at android.os.Handler.dispatchMessage(Handler.java:102) 
 at android.os.Looper.loop(Looper.java:136) 
 at android.app.ActivityThread.main(ActivityThread.java:5291) 
 at java.lang.reflect.Method.invokeNative(Native Method) 
 at java.lang.reflect.Method.invoke(Method.java:515) 
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
 at dalvik.system.NativeStart.main(Native Method) 
</init></clinit></init></clinit></init></clinit></init></clinit>


How can i solve this error ?



Why error occurs ?


-
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