ijkplayer--Protocol not found问题定位

在使用ijk播放一个mp4的时候，突然出现了一个错误

what = -10000, error=0

我们如何去定位这个错误呢？

我们在IjkMediaPlayer类的

public final class IjkMediaPlayer extends AbstractMediaPlayer {

}

public abstract class AbstractMediaPlayer implements IMediaPlayer {
    private OnErrorListener mOnErrorListener;

    public final void setOnErrorListener(OnErrorListener listener) {
        mOnErrorListener = listener;
    }

        protected final boolean notifyOnError(int what, int extra) {
        return mOnErrorListener != null && mOnErrorListener.onError(this, what, extra);
    }
}

我们看下notifyOnError

IjkMediaPlayer.java

private static class EventHandler extends Handler {
    private final WeakReference<IjkMediaPlayer> mWeakPlayer;

public EventHandler(IjkMediaPlayer mp, Looper looper) {
    super(looper);
    mWeakPlayer = new WeakReference<IjkMediaPlayer>(mp);
}
@Override
public void handleMessage(Message msg) {
    case MEDIA_ERROR:
    DebugLog.e(TAG, "Error (" + msg.arg1 + "," + msg.arg2 + ")");
    if (!player.notifyOnError(msg.arg1, msg.arg2)) {
        player.notifyOnCompletion();
    }
    player.stayAwake(false);
    return;
}
}


private void initPlayer(IjkLibLoader libLoader) {
    loadLibrariesOnce(libLoader);
    initNativeOnce();

    Looper looper;
    if ((looper = Looper.myLooper()) != null) {
        mEventHandler = new EventHandler(this, looper);
    } else if ((looper = Looper.getMainLooper()) != null) {
        mEventHandler = new EventHandler(this, looper);
    } else {
        mEventHandler = null;
    }

    /*
     * Native setup requires a weak reference to our object. It's easier to
     * create it here than in C++.
     */
    native_setup(new WeakReference<IjkMediaPlayer>(this));
}


@CalledByNative
private static void postEventFromNative(Object weakThiz, int what,
        int arg1, int arg2, Object obj) {
    if (weakThiz == null)
        return;

    @SuppressWarnings("rawtypes")
    IjkMediaPlayer mp = (IjkMediaPlayer) ((WeakReference) weakThiz).get();
    if (mp == null) {
        return;
    }

    if (what == MEDIA_INFO && arg1 == MEDIA_INFO_STARTED_AS_NEXT) {
        // this acquires the wakelock if needed, and sets the client side
        // state
        mp.start();
    }
    if (mp.mEventHandler != null) {
        Message m = mp.mEventHandler.obtainMessage(what, arg1, arg2, obj);
        mp.mEventHandler.sendMessage(m);
    }
}

通过上面的代码我们可以知道错误是通过postEventFromNative发出来的。

我们看下底层对postEventFromNative的调用

ijkj4a/j4a/class/tv/danmaku/ijk/media/player/IjkMediaPlayer.c
    class_id = class_J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer.id;
    name     = "postEventFromNative";
    sign     = "(Ljava/lang/Object;IIILjava/lang/Object;)V";
    class_J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer.method_postEventFromNative = J4A_GetStaticMethodID__catchAll(env, class_id, name, sign);
    if (class_J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer.method_postEventFromNative == NULL)
        goto fail;

通过这段我们就知道class_J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer.method_postEventFromNative就是java层的postEventFromNative

 void J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer__postEventFromNative(JNIEnv *env, jobject weakThiz, jint what, jint arg1, jint arg2, jobject obj)
{
    (*env)->CallStaticVoidMethod(env, class_J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer.id, class_J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer.method_postEventFromNative, weakThiz, what, arg1, arg2, obj);
}      

void J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer__postEventFromNative__catchAll(JNIEnv *env, jobject weakThiz, jint what, jint arg1, jint arg2, jobject obj)
{
    J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer__postEventFromNative(env, weakThiz, what, arg1, arg2, obj);
    J4A_ExceptionCheck__catchAll(env);
}

#define J4AC_IjkMediaPlayer__postEventFromNative J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer__postEventFromNative
#define J4AC_IjkMediaPlayer__postEventFromNative__catchAll J4AC_tv_danmaku_ijk_media_player_IjkMediaPlayer__postEventFromNative__catchAll




inline static void post_event(JNIEnv *env, jobject weak_this, int what, int arg1, int arg2)
{
    // MPTRACE("post_event(%p, %p, %d, %d, %d)", (void*)env, (void*) weak_this, what, arg1, arg2);
    J4AC_IjkMediaPlayer__postEventFromNative(env, weak_this, what, arg1, arg2, NULL);
    // MPTRACE("post_event()=void");
}

inline static void post_event2(JNIEnv *env, jobject weak_this, int what, int arg1, int arg2, jobject obj)
{
    // MPTRACE("post_event2(%p, %p, %d, %d, %d, %p)", (void*)env, (void*) weak_this, what, arg1, arg2, (void*)obj);
    J4AC_IjkMediaPlayer__postEventFromNative(env, weak_this, what, arg1, arg2, obj);
    // MPTRACE("post_event2()=void");
}

我们看下在那里调用的post_event，post_event2

我们看到

static void message_loop_n(JNIEnv *env, IjkMediaPlayer *mp)
{
    jobject weak_thiz = (jobject) ijkmp_get_weak_thiz(mp);
    JNI_CHECK_GOTO(weak_thiz, env, NULL, "mpjni: message_loop_n: null weak_thiz", LABEL_RETURN);

    while (1) {
        AVMessage msg;

        int retval = ijkmp_get_msg(mp, &msg, 1);
        if (retval < 0)
            break;

        // block-get should never return 0
        assert(retval > 0);

        switch (msg.what) {
        case FFP_MSG_FLUSH:
            MPTRACE("FFP_MSG_FLUSH:\n");
            post_event(env, weak_thiz, MEDIA_NOP, 0, 0);
            break;
        case FFP_MSG_ERROR:
            MPTRACE("FFP_MSG_ERROR: %d\n", msg.arg1);
            post_event(env, weak_thiz, MEDIA_ERROR, MEDIA_ERROR_IJK_PLAYER, msg.arg1);
            break;
        case FFP_MSG_PREPARED:
            MPTRACE("FFP_MSG_PREPARED:\n");
            post_event(env, weak_thiz, MEDIA_PREPARED, 0, 0);
            break;
        case FFP_MSG_COMPLETED:
            MPTRACE("FFP_MSG_COMPLETED:\n");
            post_event(env, weak_thiz, MEDIA_PLAYBACK_COMPLETE, 0, 0);
            break;
        case FFP_MSG_VIDEO_SIZE_CHANGED:
            MPTRACE("FFP_MSG_VIDEO_SIZE_CHANGED: %d, %d\n", msg.arg1, msg.arg2);
            post_event(env, weak_thiz, MEDIA_SET_VIDEO_SIZE, msg.arg1, msg.arg2);
            break;
        case FFP_MSG_SAR_CHANGED:
            MPTRACE("FFP_MSG_SAR_CHANGED: %d, %d\n", msg.arg1, msg.arg2);
            post_event(env, weak_thiz, MEDIA_SET_VIDEO_SAR, msg.arg1, msg.arg2);
            break;
        case FFP_MSG_VIDEO_RENDERING_START:
            MPTRACE("FFP_MSG_VIDEO_RENDERING_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_VIDEO_RENDERING_START, 0);
            break;
        case FFP_MSG_AUDIO_RENDERING_START:
            MPTRACE("FFP_MSG_AUDIO_RENDERING_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_AUDIO_RENDERING_START, 0);
            break;
        case FFP_MSG_VIDEO_ROTATION_CHANGED:
            MPTRACE("FFP_MSG_VIDEO_ROTATION_CHANGED: %d\n", msg.arg1);
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_VIDEO_ROTATION_CHANGED, msg.arg1);
            break;
        case FFP_MSG_AUDIO_DECODED_START:
            MPTRACE("FFP_MSG_AUDIO_DECODED_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_AUDIO_DECODED_START, 0);
            break;
        case FFP_MSG_VIDEO_DECODED_START:
            MPTRACE("FFP_MSG_VIDEO_DECODED_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_VIDEO_DECODED_START, 0);
            break;
        case FFP_MSG_OPEN_INPUT:
            MPTRACE("FFP_MSG_OPEN_INPUT:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_OPEN_INPUT, 0);
            break;
        case FFP_MSG_FIND_STREAM_INFO:
            MPTRACE("FFP_MSG_FIND_STREAM_INFO:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_FIND_STREAM_INFO, 0);
            break;
        case FFP_MSG_COMPONENT_OPEN:
            MPTRACE("FFP_MSG_COMPONENT_OPEN:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_COMPONENT_OPEN, 0);
            break;
        case FFP_MSG_BUFFERING_START:
            MPTRACE("FFP_MSG_BUFFERING_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_BUFFERING_START, msg.arg1);
            break;
        case FFP_MSG_BUFFERING_END:
            MPTRACE("FFP_MSG_BUFFERING_END:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_BUFFERING_END, msg.arg1);
            break;
        case FFP_MSG_BUFFERING_UPDATE:
            // MPTRACE("FFP_MSG_BUFFERING_UPDATE: %d, %d", msg.arg1, msg.arg2);
            post_event(env, weak_thiz, MEDIA_BUFFERING_UPDATE, msg.arg1, msg.arg2);
            break;
        case FFP_MSG_BUFFERING_BYTES_UPDATE:
            break;
        case FFP_MSG_BUFFERING_TIME_UPDATE:
            break;
        case FFP_MSG_SEEK_COMPLETE:
            MPTRACE("FFP_MSG_SEEK_COMPLETE:\n");
            post_event(env, weak_thiz, MEDIA_SEEK_COMPLETE, 0, 0);
            break;
        case FFP_MSG_ACCURATE_SEEK_COMPLETE:
            MPTRACE("FFP_MSG_ACCURATE_SEEK_COMPLETE:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_MEDIA_ACCURATE_SEEK_COMPLETE, msg.arg1);
            break;
        case FFP_MSG_PLAYBACK_STATE_CHANGED:
            break;
        case FFP_MSG_TIMED_TEXT:
            if (msg.obj) {
                jstring text = (*env)->NewStringUTF(env, (char *)msg.obj);
                post_event2(env, weak_thiz, MEDIA_TIMED_TEXT, 0, 0, text);
                J4A_DeleteLocalRef__p(env, &text);
            }
            else {
                post_event2(env, weak_thiz, MEDIA_TIMED_TEXT, 0, 0, NULL);
            }
            break;
        case FFP_MSG_GET_IMG_STATE:
            if (msg.obj) {
                jstring file_name = (*env)->NewStringUTF(env, (char *)msg.obj);
                post_event2(env, weak_thiz, MEDIA_GET_IMG_STATE, msg.arg1, msg.arg2, file_name);
                J4A_DeleteLocalRef__p(env, &file_name);
            }
            else {
                post_event2(env, weak_thiz, MEDIA_GET_IMG_STATE, msg.arg1, msg.arg2, NULL);
            }
            break;
        case FFP_MSG_VIDEO_SEEK_RENDERING_START:
            MPTRACE("FFP_MSG_VIDEO_SEEK_RENDERING_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_VIDEO_SEEK_RENDERING_START, msg.arg1);
            break;
        case FFP_MSG_AUDIO_SEEK_RENDERING_START:
            MPTRACE("FFP_MSG_AUDIO_SEEK_RENDERING_START:\n");
            post_event(env, weak_thiz, MEDIA_INFO, MEDIA_INFO_AUDIO_SEEK_RENDERING_START, msg.arg1);
            break;
        default:
            ALOGE("unknown FFP_MSG_xxx(%d)\n", msg.what);
            break;
        }
        msg_free_res(&msg);
    }

LABEL_RETURN:
    ;
}

我们知道what是-10000

那么我们就知道case走到了

        case FFP_MSG_ERROR:
            MPTRACE("FFP_MSG_ERROR: %d\n", msg.arg1);
            post_event(env, weak_thiz, MEDIA_ERROR, MEDIA_ERROR_IJK_PLAYER, msg.arg1);
            break;

我们看下那里调用了FFP_MSG_ERROR,也就是说我们看到了

static int read_thread(void *arg)
{
    int last_error = 0;

    
 fail:
    if (ic && !is->ic)
        avformat_close_input(&ic);

    if (!ffp->prepared || !is->abort_request) {
        ffp->last_error = last_error;
        ffp_notify_msg2(ffp, FFP_MSG_ERROR, last_error);
    }
    SDL_DestroyMutex(wait_mutex);
    return 0;
}

我们知道error是0，所以肯定是走的read_thread。

我们打log，发现在

    err = avformat_open_input(&ic, is->filename, is->iformat, &ffp->format_opts);
    if (err < 0) {
        print_error(is->filename, err);
        ret = -1;
        goto fail;
    }

报错，可以猜测到时ffmpeg编译的协议少了不支持。

那么我们继续看log发现了提示的一句话

W/IJKMEDIA: https protocol not found, recompile FFmpeg with openssl, gnutls or securetransport enabled.

现在明白了，编译ffmpeg的时候缺少openssl，对https缺少了支持

我们可以通过IJKMediaPlayer 加载https时协议找不到 Protocol not found_zp704720467的博客-CSDN博客

安装openssl

openssl安装的时候可能报错，我使用的ndk是 android-ndk-r12b

./compile-openssl.sh all这一句不要执行，要单独编译

如

./compile-openssl.sh arm64