本文介绍了问题串联使用FFMPEG两个视频文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想从串联画廊采取两种mp4文件。我正在与流程执行失败的问题。我已经加入了code和错误日志。使用从监护人的项目采取的ffmpeg库。
I am trying to concatenate two mp4 files taken from gallery. I am getting issue with process execution failure. I have added the code and the error log. Using the ffmpeg library taken from guardian project.
我在三星Galaxy S3设备上运行这一点。
I am running this in Samsung Galaxy S3 device.
该错误被抛出这一行。
ProcessBuilder pb = new ProcessBuilder(cmds);
pb.directory(fileExec);
Process process = pb.start();
在我这个上面替换的最后一行，
When I replace the last line above with this,
Process process = Runtime.getRuntime().exec("chmod 777 "+cmds.toArray(new String[cmds.size()]));
它与出异常，如下所示。但输出似乎不来了。
It works with out the exception as shown below. But the output doesn't seem to come.
文件串联code：
File fileVideoOutput = new File(getApplicationContext()
.getExternalFilesDir("test") + "hello.mp4");
fileVideoOutput.delete();
File fileTmp = getApplicationContext().getCacheDir();
File fileAppRoot = new File(getApplicationContext()
.getApplicationInfo().dataDir);
try {
FfmpegController fc = new FfmpegController(fileTmp, fileAppRoot);
ArrayList<Clip> listVideos = new ArrayList<Clip>();
Clip clip = new Clip();
clip.path = video1;
fc.getInfo(clip);
clip.duration = clip.duration;
System.out.println("Clip1 duration " + clip.duration);
listVideos.add(clip);
Clip clip2 = new Clip();
clip2.path = video2;
fc.getInfo(clip2);
clip2.duration = clip2.duration;
System.out.println("Clip2 duration " + clip2.duration);
listVideos.add(clip2);
Clip clipOut = new Clip();
clipOut.path = fileVideoOutput.getCanonicalPath();
fc.concatAndTrimFilesMP4Stream(listVideos, clipOut, false, false,
new ShellUtils.ShellCallback() {
@Override
public void shellOut(String shellLine) {
System.out.println("fc>" + shellLine);
}
@Override
public void processComplete(int exitValue) {
if (exitValue < 0)
System.err.println("concat non-zero exit: "
+ exitValue);
}
});
} catch (Exception e1) {
e1.printStackTrace();
}
错误日志：
05-08 11:17:03.765: W/System.err(25209): java.io.IOException: Error running exec(). Command: [ffmpeg, -y, -i, /storage/emulated/0/DCIM/Camera/20140507_155713.mp4, -f, mpegts, -c, copy, -an, -bsf:v, h264_mp4toannexb, /data/data/com.yoyo.videoeditor/cache/0.ts] Working Directory: /data/data/com.yoyo.videoeditor/lib Environment: [VIBE_PIPE_PATH=/dev/pipes, ANDROID_ROOT=/system, EMULATED_STORAGE_SOURCE=/mnt/shell/emulated, LOOP_MOUNTPOINT=/mnt/obb, EMULATED_STORAGE_TARGET=/storage/emulated, ANDROID_BOOTLOGO=1, LD_LIBRARY_PATH=/vendor/lib:/system/lib, EXTERNAL_STORAGE=/storage/emulated/legacy, ANDROID_SOCKET_zygote=9, ANDROID_DATA=/data, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ANDROID_ASSETS=/system/app, ASEC_MOUNTPOINT=/mnt/asec, BOOTCLASSPATH=/system/framework/core.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/sec_edm.jar:/system/framework/seccamera.jar:/system/framework/scrollpause.jar:/system/framework/stayrotation.jar:/system/framework/smartfaceservice.jar:/system/framework/sc.jar:/system/framework/secocsp.jar:/system/framework/commonimsinterface.jar, ANDROID_PROPERTY_WORKSPACE=8,66560, SECONDARY_STORAGE=/storage/extSdCard:/storage/UsbDriveA:/storage/UsbDriveB:/storage/UsbDriveC:/storage/UsbDriveD:/storage/UsbDriveE:/storage/UsbDriveF, ANDROID_STORAGE=/storage]
05-08 11:17:03.770: W/System.err(25209): at java.lang.ProcessManager.exec(ProcessManager.java:211)
05-08 11:17:03.770: W/System.err(25209): at java.lang.ProcessBuilder.start(ProcessBuilder.java:195)
05-08 11:17:03.770: W/System.err(25209): at org.ffmpeg.android.FfmpegController.execProcess(FfmpegController.java:101)
05-08 11:17:03.770: W/System.err(25209): at org.ffmpeg.android.FfmpegController.execFFMPEG(FfmpegController.java:71)
05-08 11:17:03.770: W/System.err(25209): at org.ffmpeg.android.FfmpegController.execFFMPEG(FfmpegController.java:75)
05-08 11:17:03.775: W/System.err(25209): at org.ffmpeg.android.FfmpegController.convertToMP4Stream(FfmpegController.java:657)
05-08 11:17:03.775: W/System.err(25209): at org.ffmpeg.android.FfmpegController.concatAndTrimFilesMP4Stream(FfmpegController.java:1107)
05-08 11:17:03.775: W/System.err(25209): at com.yoyo.videoeditor.EditorActivity.mergeVideosOld(EditorActivity.java:271)
05-08 11:17:03.775: W/System.err(25209): at com.yoyo.videoeditor.EditorActivity.access$0(EditorActivity.java:243)
05-08 11:17:03.775: W/System.err(25209): at com.yoyo.videoeditor.EditorActivity$3.onClick(EditorActivity.java:85)
05-08 11:17:03.775: W/System.err(25209): at android.view.View.performClick(View.java:4475)
05-08 11:17:03.775: W/System.err(25209): at android.view.View$PerformClick.run(View.java:18786)
05-08 11:17:03.780: W/System.err(25209): at android.os.Handler.handleCallback(Handler.java:730)
05-08 11:17:03.780: W/System.err(25209): at android.os.Handler.dispatchMessage(Handler.java:92)
05-08 11:17:03.780: W/System.err(25209): at android.os.Looper.loop(Looper.java:176)
05-08 11:17:03.780: W/System.err(25209): at android.app.ActivityThread.main(ActivityThread.java:5419)
05-08 11:17:03.780: W/System.err(25209): at java.lang.reflect.Method.invokeNative(Native Method)
05-08 11:17:03.785: W/System.err(25209): at java.lang.reflect.Method.invoke(Method.java:525)
05-08 11:17:03.785: W/System.err(25209): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
05-08 11:17:03.785: W/System.err(25209): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
05-08 11:17:03.785: W/System.err(25209): at dalvik.system.NativeStart.main(Native Method)
05-08 11:17:03.785: W/System.err(25209): Caused by: java.io.IOException: Permission denied
05-08 11:17:03.785: W/System.err(25209): at java.lang.ProcessManager.exec(Native Method)
05-08 11:17:03.790: W/System.err(25209): at java.lang.ProcessManager.exec(ProcessManager.java:209)
05-08 11:17:03.790: W/System.err(25209): ... 20 more
下面是我的ffmpeg的命令，在FFmpeg教程页面给出。
Here is my ffmpeg commands as given in the ffmpeg tutorial page.
ffmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i input2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output.mp4
FFMPEG库似乎并不能按预期工作。当我使用添加命令，并创建输出文件正在创建触摸shell命令文件。尽管如此，我无法看到的ffmpeg输出符合市场预期。
FFMPEG library doesn't seem to be working as expected. When I add commands and create output file using "touch" shell command file is being created. Still I am unable to see the output from ffmpeg as expected.
推荐答案
我看到你有一个java.io.IOException异常：权限被拒绝，你有读/写在你的应用程序文件清单的权利？
你能证明你的甲肾上腺素AndroidManifest.xml文件？
I see you have a java.io.IOException: Permission denied, do you have the right to read/write files in you application manifest ?Can you show ne your AndroidManifest.xml file ?
最好是做应用程序的临时目录中的一切，然后将它们复制到外部SD卡。
The best is to do everything in the app's temporary directory, then copy them to the external SD card.
为了拷贝文件，你必须使用自定义类，这是我的：
In order to copy files, you have to use a custom class, here's mine :
package com.five_doors.xposedtranslate.util;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.channels.FileChannel;
/**
* A small util file class to handle things Java 6 Should have handled himself
* @author Hugo
*
*/
public class FileUtil {
public static void copyFile(File sourceFile, File destFile) throws IOException {
if(!destFile.exists()) {
destFile.createNewFile();
}
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
// previous code: destination.transferFrom(source, 0, source.size());
// to avoid infinite loops, should be:
long count = 0;
long size = source.size();
while((count += destination.transferFrom(source, count, size-count))<size);
}
finally {
if(source != null) {
source.close();
}
if(destination != null) {
destination.close();
}
}
}
public static void deleteRecursive(File fileOrDirectory) {
if (fileOrDirectory.isDirectory())
for (File child : fileOrDirectory.listFiles())
deleteRecursive(child);
fileOrDirectory.delete();
}
public static String convertStreamToString(InputStream is) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
reader.close();
return sb.toString();
}
public static String getStringFromFile (String filePath) throws Exception {
File fl = new File(filePath);
FileInputStream fin = new FileInputStream(fl);
String ret = convertStreamToString(fin);
//Make sure you close all streams.
fin.close();
return ret;
}
}
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