工作目录:空环境:空
工作目录:空环境:空
提问于 2014-04-09 07:28:39
我正尝试在安卓系统上使用ffmpeg.so，我得到了工作目录:空环境:空错误。
try {
Process p = Runtime.getRuntime().exec("/data/data/com.example.foo/files/ffmpeg -f image2 -i "
+ Environment.getExternalStorageDirectory().getAbsolutePath() + "/img/b%d.jpg "
+ Environment.getExternalStorageDirectory().getAbsolutePath() + "/DCIM/Camera/a444.mp4");
} catch (IOException e) {
e.printStackTrace();
}错误日志
04-09 01:50:45.683: I/Adreno-EGL(18393): <qeglDrvAPI_eglInitialize:320>: EGL 1.4 QUALCOMM Build: I0404c4692afb8623f95c43aeb6d5e13ed4b30ddbDate: 11/06/13
04-09 01:50:45.713: D/OpenGLRenderer(18393): Enabling debug mode 0
04-09 01:53:56.487: D/dalvikvm(18551): Trying to load lib /data/app-lib/com.example.sodeneme-1/libffmpeg.so 0x423d7d00
04-09 01:53:56.487: D/dalvikvm(18551): Added shared lib /data/app-lib/com.example.sodeneme-1/libffmpeg.so 0x423d7d00
04-09 01:53:56.487: D/dalvikvm(18551): No JNI_OnLoad found in /data/app-lib/com.example.sodeneme-1/libffmpeg.so 0x423d7d00, skipping init
04-09 01:53:56.537: W/System.err(18551): java.io.IOException: Error running exec(). Command: [/data/data/com.example.sodeneme/files/ffmpeg, -f, image2, -i, /storage/emulated/0/img/b%d.jpg, /storage/emulated/0/DCIM/Camera/a444.mp4] Working Directory: null Environment: null
04-09 01:53:56.537: W/System.err(18551): at java.lang.ProcessManager.exec(ProcessManager.java:211)
04-09 01:53:56.537: W/System.err(18551): at java.lang.Runtime.exec(Runtime.java:173)
04-09 01:53:56.537: W/System.err(18551): at java.lang.Runtime.exec(Runtime.java:246)
04-09 01:53:56.537: W/System.err(18551): at java.lang.Runtime.exec(Runtime.java:189)
04-09 01:53:56.537: W/System.err(18551): at com.example.sodeneme.MainActivity.onCreate(MainActivity.java:40)
04-09 01:53:56.537: W/System.err(18551): at android.app.Activity.performCreate(Activity.java:5231)
04-09 01:53:56.537: W/System.err(18551): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
04-09 01:53:56.537: W/System.err(18551): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
04-09 01:53:56.537: W/System.err(18551): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
04-09 01:53:56.537: W/System.err(18551): at android.app.ActivityThread.access$800(ActivityThread.java:135)
04-09 01:53:56.537: W/System.err(18551): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
04-09 01:53:56.537: W/System.err(18551): at android.os.Handler.dispatchMessage(Handler.java:102)
04-09 01:53:56.537: W/System.err(18551): at android.os.Looper.loop(Looper.java:136)
04-09 01:53:56.537: W/System.err(18551): at android.app.ActivityThread.main(ActivityThread.java:5017)
04-09 01:53:56.537: W/System.err(18551): at java.lang.reflect.Method.invokeNative(Native Method)
04-09 01:53:56.537: W/System.err(18551): at java.lang.reflect.Method.invoke(Method.java:515)
04-09 01:53:56.537: W/System.err(18551): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
04-09 01:53:56.537: W/System.err(18551): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
04-09 01:53:56.537: W/System.err(18551): at dalvik.system.NativeStart.main(Native Method)
04-09 01:53:56.547: W/System.err(18551): Caused by: java.io.IOException: No such file or directory
04-09 01:53:56.547: W/System.err(18551): at java.lang.ProcessManager.exec(Native Method)
04-09 01:53:56.547: W/System.err(18551): at java.lang.ProcessManager.exec(ProcessManager.java:209)
04-09 01:53:56.547: W/System.err(18551): ... 18 more
04-09 01:53:56.577: I/Adreno-EGL(18551): <qeglDrvAPI_eglInitialize:320>: EGL 1.4 QUALCOMM Build: I0404c4692afb8623f95c43aeb6d5e13ed4b30ddbDate: 11/06/13
04-09 01:53:56.607: D/OpenGLRenderer(18551): Enabling debug mode 0权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />回答 3
Stack Overflow用户
发布于 2015-03-02 19:46:28
您需要确保/data/data/com.example.foo/files/ffmpeg文件具有正确的文件权限。
您可以使用以下命令查看文件权限：
String[] command = new String[]{"/system/bin/ls", "-l",
"/data/data/com.example.foo/files/ffmpeg" };
Process process = Runtime.getRuntime().exec(command);
BufferedReader reader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
int read;
String output = "";
String line;
while ((line = reader.readLine()) != null) {
output.concat(line + "\n");
Log.w("myApp", "[[output]]:" + line);
}
reader.close();
process.waitFor(); 输出将如下所示(取决于实际权限，在本例中权限为777)：
[[output]]:-rwxrwxrwx u0_a67 u0_a67 254460 2015-03-02 17:12 ffmpeg您可以使用以下命令将权限设置为744：
String[] command = new String[]{"/system/bin/chmod", "744",
"/data/data/com.example.foo/files/ffmpeg" };如果您从外部活动(比如从服务)执行此命令，则您的权限必须为777 (而不是744)
Stack Overflow用户
发布于 2020-04-23 19:55:56
在执行exec命令之前，您缺少以下内容：
try {
ffmpeg.loadBinary(new LoadBinaryResponseHandler() {
@Override
public void onStart() {}
@Override
public void onFailure() {}
@Override
public void onSuccess() {}
@Override
public void onFinish() {}
});
} catch (FFmpegNotSupportedException e) {
// Handle if FFmpeg is not supported by device
}Stack Overflow用户
发布于 2019-08-12 07:04:55
在我的示例中，您需要添加"sh -c“，如下例所示：
sh -c shellcommand 希望能有所帮助。
大卫
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/22950139
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