Android Ffmpeg-根权限未授予“ su”工作目录：空

Question

I have compiled ffmpeg for android using ndk r10e on os x but it does not produce ffmpeg.so. All other libraries are generated. I have been searching this for over a week. I have tried various methods to execute ffmpeg command but none were successful. I used

Process p=new ProcessBuilder("su /data/data/com.example.ffmpegtem/").start();

Process p = Runtime.getRuntime().exec(
                getBaseContext().getApplicationInfo().nativeLibraryDir); 

Process p = Runtime.getRuntime().exec(Environment.getExternalStorageDirectory().getPath()); 
Process p = Runtime.getRuntime().exec("chmod 700 /data/data/com.example.ffmpegtem/app_bin/ffmpeg");

All resulted in IOException-Working Directory: null. I also tried Shell Callback method provided by Github android ffmpeg library project which resulted in Nullpointerexception. I have written read/write permission.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Convert 1 image to video code:

DataOutputStream os = new DataOutputStream(chperm.getOutputStream());
os.writeBytes("-loop 1 -i " + inpath + " -c:v libx264 -t 15 -pix_fmt yuv420p -vf scale=320:240 "+outpath);

What am I doing wrong? Please help

Answer 1

Why do you want to run ffmpeg cmd in Android enviroment? Why not use it programatically? You could try a library here https://github.com/search?utf8=%E2%9C%93&q=ffmpeg+android and write some code to achieve your goal.