Recently I came across the similar problem. My solution is to simulate a command line in Java program.
Firstly, I add a function to the file "ffmpeg.c":
int cmd_simulation(int argc, const char** argv)
{
OptionsContext o = { 0 };
// int64_t ti;
reset_options(&o, 0);
av_log_set_flags(AV_LOG_SKIP_REPEATED);
parse_loglevel(argc, argv, options);
if(argc>1 && !strcmp(argv[1], "-d")){
run_as_daemon=1;
av_log_set_callback(log_callback_null);
argc--;
argv++;
}
avcodec_register_all();
avfilter_register_all();
av_register_all();
avformat_network_init();
//show_banner(argc, argv, options);
term_init();
parse_cpuflags(argc, argv, options);
/* parse options */
parse_options(&o, argc, argv, options, opt_output_file);
if (nb_output_files <= 0 && nb_input_files == 0) {
show_usage();
av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
exit_program(1);
}
if (nb_output_files <= 0) {
av_log(NULL, AV_LOG_FATAL, "At least one output file must be specified\n");
exit_program(1);
}
if (transcode() < 0)
exit_program(1);
//exit_program(0);
return 7;
}
In fact this function is just a copy of the main function with a little modification.
Then create a native function:
extern const char* cmd_simulation(int, const char**);
JNIEXPORT int JNICALL Java_com_test_videowatermark_VideoUtil_test(JNIEnv * env, jobject object, jobjectArray strArray);
JNIEXPORT int JNICALL Java_com_test_videowatermark_VideoUtil_test(JNIEnv * env, jobject object, jobjectArray strArray)
{
int arrayLength = (*env)->GetArrayLength(env, strArray);
const char* args[arrayLength];
int i;
for(i = 0; i < arrayLength; i++){
jstring jstr = (jstring)((*env)->GetObjectArrayElement(env, strArray, i));
args[i] = (*env)->GetStringUTFChars(env, jstr, 0);
//strcpy(args[i], arg);
//env->ReleaseStringUTFChars(jstr, arg);
}
const char** argv = args;
return cmd_simulation(arrayLength, argv);
}
After compilation with ffmpeg, you can simulate excuting ffmpeg commands like:
private void executeCommand(){
String[] command = {"ffmpeg", "-i", "some video file name",};
int result = test(command);
}
Hope this helps!
EDIT:
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_WHOLE_STATIC_LIBRARIES := libavformat libavcodec libavutil libpostproc libswscale libswresample libavfilter
LOCAL_MODULE := VideoUtilLib
LOCAL_SRC_FILES := NativeVideoUtil.c ffmpeg.c ffmpeg_opt.c cmdutils.c ffmpeg_filter.c
LOCAL_LDLIBS := -lz -llog
include $(BUILD_SHARED_LIBRARY)
include $(call all-makefiles-under,$(LOCAL_PATH))
Replace NativeVideoUtil.c with your native file.
