Getting exception while trying to run ffmpeg via command line in android

Question

I want to use ffmpeg via command line arguments in android application.For this purpose:

I have cross-compiled the ffmpeg lib and got the libffmpeg.so
I have stored libffmpeg.so in files directory of the app.

This is the code i am using:

public class MainActivity extends Activity {

    Process p;

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

            String[] cmd =new String[4];
        cmd[0]="/data/data/com.example.ffmpegnew/files/libffmpeg";
        cmd[1]="-i";
        cmd[2]="mnt/sdcard/music/baba.mp4";
        cmd[3]="mnt/sdcard/music/outfile.mp4";

        p = Runtime.getRuntime().exec(cmd,null, new File("/data/data/com.example.ffmpegnew/files"));

        }
        catch(Exception e)
        {
            System.out.println("exception"+e);
        }

    }

}

This is the exception i am getting:

09-17 13:47:01.679: I/System.out(3752): exceptionjava.io.IOException: Error running exec(). Command: [/data/data/com.example.ffmpegnew/files/libffmpeg.so, -i, mnt/sdcard/music/baba.mp4, mnt/sdcard/music/outfile.mp4] Working Directory: /data/data/com.example.ffmpegnew/files Environment: null

Please tell me how to solve this problem.Thanks in advance.

Community · Accepted Answer · 2017-05-23 12:03:18Z

1

I guess you are trying to run an .so file with this Linux command:

/data/data/com.example.ffmpegnew/files/libffmpeg.so -i mnt/sdcard/music/baba.mp4 mnt/sdcard/music/outfile.mp4

Did you actually mean running ffmpeg executable file (see man ffmpeg)?

ffmpeg -i mnt/sdcard/music/baba.mp4 mnt/sdcard/music/outfile.mp4

I think the first step might be making your command, then your code snippet run on regular Linux, then moving it to Android.

PS. In any event, the leading "/" is missing from "mnt/..."; should be "/mnt/..."

PPS. And other discussions might be helpful 1

edited May 23, 2017 at 12:03

CommunityBot

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answered Sep 17, 2012 at 8:54

full.stack.ex

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7 Comments

user1662334 Over a year ago

yes sir, i want to run ffmpeg executable file like we run it on cmd in windows.

user1662334 Over a year ago

I think sir,there must be some way of running the ffmpeg using command line in android

full.stack.ex Over a year ago

Please check the link in the answer above: some people have apparently had some success with that: stackoverflow.com/questions/4725773/ffmpeg-on-android?rq=1

user1662334 Over a year ago

This is not helpful in my case sir.

full.stack.ex Over a year ago

Anyway, I think to go further down that path, you will need to: 1) build the (static?) executable; 2) at least fix the leading "/". Then run your code, having the leading "lib" removed from your first parameter. Oh, and, BTW, make sure the binaries (executable, lib) are really deployed to that directory.

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