[FFmpeg-user] Guidance with Implemention video filter through FFMpeg in Android

[Deepanjan Das]

Greetings All!
Hope this message of mine finds you in best of health and spirits.

Here is my problem, it would be great if someone may put forward some
guidance.

I have a video file and am trying to scale it using -vf argument for ffmpeg
"Angel" repo version used in an android project. The build through NDK is
going smooth, but when I write this code, the application starts and exits.
If I use any other argument other than -vf it works fine and export the
video.

JNIEXPORT jint JNICALL
Java_com_schemaphic_mirrorapp_jni_NativeHelper_hFlipVideoEffect(
JNIEnv *env, jstring outFile )
{
//ffplay -i INPUT -vf "crop=iw/2:ih:0:0,split[tmp],pad=2*iw[left];
[tmp]hflip[right]; [left][right] overlay=W/2"
//fmpeg -i input -vf scale=iw/2:-1 output
//ffmpeg -i input -vf yadif=0:0:0,scale=iw/2:-1  output

char** arguments;
int count = 6;

arguments = calloc( count, sizeof( char* ) );

arguments[0] = "ffmpeg";

arguments[1] = "-i";
arguments[2] = "/sdcard/mirrorapp/cropVideo.mp4";

arguments[3] = "-vf";
arguments[4] = "scale=120:-1";

//arguments[5] = "-aspect";
//arguments[6] = "3:2";
//arguments[5] = "-vcodec";
//arguments[6] = "mpeg4";
/*arguments[9] = "-r";
arguments[10] = "19";
arguments[5] = "-cropright";
arguments[6] = "240";
arguments[7] = "-padleft";
arguments[8] = "0";
arguments[9] = "-padtop";
arguments[10] = "0";
arguments[11] = "-aspect";
arguments[12] = "3:2";
arguments[13] = "-an";
arguments[5] = "-vcodec";
arguments[6] = "mpeg4";*/
//arguments[7] = "-sameq";
arguments[5] = "/sdcard/mirrorapp/cropFlipVideo.mp4";

ffmpeg_main( count, arguments );
//free(arguments);

return 1;
}


This gives me an impression that the set up is correct. the argument -vf is
somehow not working or am not sure of the newer syntax. Kindly help.

..
Warm Regards
Deepanjan Das
+91.9836582808
http://deepanjandas.wordpress.com

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