diff --git a/ijkmediaplayer/jni/ijkplayer/ff_ffplay.c b/ijkmediaplayer/jni/ijkplayer/ff_ffplay.c
index 9348f5a95c8549ef9e971dcf892efb0821f1bffd..e937b0579de315c499c3f76f7969211430c23c08 100644
--- a/ijkmediaplayer/jni/ijkplayer/ff_ffplay.c
+++ b/ijkmediaplayer/jni/ijkplayer/ff_ffplay.c
@@ -2550,6 +2550,21 @@ int ijkff_wait_stop(FFPlayer *ffp)
     return 0;
 }
 
+int ijkff_seek_to_l(FFPlayer *ffp, long msec)
+{
+    assert(ffp);
+    VideoState *is = ffp->is;
+    if (!is)
+        return EIJK_NULL_IS_PTR;
+
+    // FIXME: thread-safe
+    // FIXME: seek by bytes
+    // FIXME: seek out of range
+    // FIXME: seekable
+    stream_seek(ffp, milliseconds_to_fftime(msec), 0, 0);
+    return 0;
+}
+
 long ijkff_get_current_position_l(FFPlayer *ffp)
 {
     assert(ffp);
diff --git a/ijkmediaplayer/jni/ijkplayer/ff_ffplay.h b/ijkmediaplayer/jni/ijkplayer/ff_ffplay.h
index 567b1e1ec5f12bcde8fa0539a8ab901317d9173e..b34d53e790377b12f0f60245ee01abf2b64b5aa3 100644
--- a/ijkmediaplayer/jni/ijkplayer/ff_ffplay.h
+++ b/ijkmediaplayer/jni/ijkplayer/ff_ffplay.h
@@ -38,6 +38,7 @@ int ijkff_stop_l(FFPlayer *ffp);
 int ijkff_wait_stop(FFPlayer *ffp);
 
 /* all in milliseconds */
+int ijkff_seek_to_l(IjkMediaPlayer *mp, long msec);
 long ijkff_get_current_position_l(FFPlayer *ffp);
 long ijkff_get_duration_l(FFPlayer *ffp);
 
diff --git a/ijkmediaplayer/jni/ijkplayer/ff_ffplay_def.h b/ijkmediaplayer/jni/ijkplayer/ff_ffplay_def.h
index 904bdd170abbbc3387ac95c7b32fe66ec19e6466..af95f8160e16b564d79e4778e1e259162694a9be 100644
--- a/ijkmediaplayer/jni/ijkplayer/ff_ffplay_def.h
+++ b/ijkmediaplayer/jni/ijkplayer/ff_ffplay_def.h
@@ -406,7 +406,8 @@ typedef struct FFPlayer {
 #define IJKFF_MSG_SEEK_COMPLETED    6
 
 #define IJKFF_SAFE_FREE(p) do {free(p); p = NULL;} while(0)
-#define fftime_to_milliseconds(t) (t / (AV_TIME_BASE / 1000))
+#define fftime_to_milliseconds(ts) (ts / (AV_TIME_BASE / 1000))
+#define milliseconds_to_fftime(ms) (ms * (AV_TIME_BASE / 1000))
 
 inline static void ijkff_reset(FFPlayer *ffp)
 {
diff --git a/ijkmediaplayer/jni/ijkplayer/ijkplayer.c b/ijkmediaplayer/jni/ijkplayer/ijkplayer.c
index 103f845d735456294c74debcc7bb37486b3c1054..591d679eb7b31ee62ff1af84c278552d57c2e235 100644
--- a/ijkmediaplayer/jni/ijkplayer/ijkplayer.c
+++ b/ijkmediaplayer/jni/ijkplayer/ijkplayer.c
@@ -99,7 +99,20 @@ IjkMediaPlayer *ijkmp_create()
 void ijkmp_shutdown(IjkMediaPlayer *mp)
 {
     assert(mp);
-// FIXME: implement
+    // FIXME: implement
+}
+
+void ijkmp_reset(IjkMediaPlayer *mp)
+{
+    assert(mp);
+
+    ijkmp_stop(mp);
+
+    ijkff_reset(mp->ffplayer);
+
+    free(mp->data_source);
+    mp->data_source = NULL;
+    mp->mp_state = MP_STATE_IDLE;
 }
 
 void ijkmp_inc_ref(IjkMediaPlayer *mp)
@@ -304,12 +317,6 @@ int ijkmp_stop(IjkMediaPlayer *mp)
     return retval;
 }
 
-int ijkmp_seek_to(IjkMediaPlayer *mp, long msec)
-{
-    // FIXME: implement
-    return 0;
-}
-
 bool ijkmp_is_playing(IjkMediaPlayer *mp)
 {
     assert(mp);
@@ -321,6 +328,39 @@ bool ijkmp_is_playing(IjkMediaPlayer *mp)
     return false;
 }
 
+int ijkmp_seek_to_l(IjkMediaPlayer *mp, long msec)
+{
+    assert(mp);
+
+    MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_IDLE);
+    MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_INITIALIZED);
+    // MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_ASYNC_PREPARING);
+    // MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_PREPARED);
+    // MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_STARTED);
+    // MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_PAUSED);
+    // MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_COMPLETED);
+    MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_STOPPED);
+    MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_ERROR);
+    MPST_CHECK_NOT_RET(mp->mp_state, MP_STATE_END);
+
+    int retval = ijkmp_seek_to_l(mp->ffplayer, msec);
+    if (retval < 0) {
+        return retval;
+    }
+
+    return 0;
+}
+
+int ijkmp_seek_to(IjkMediaPlayer *mp, long msec)
+{
+    assert(mp);
+    pthread_mutex_lock(&mp->mutex);
+    int retval = ijkmp_seek_to(mp, msec);
+    pthread_mutex_unlock(&mp->mutex);
+
+    return retval;
+}
+
 static long ijkmp_get_current_position_l(IjkMediaPlayer *mp)
 {
     return ijkff_get_current_position_l(mp->ffplayer);
@@ -349,11 +389,6 @@ long ijkmp_get_duration(IjkMediaPlayer *mp)
     return retval;
 }
 
-void ijkmp_reset(IjkMediaPlayer *mp)
-{
-    // FIXME: implement
-}
-
 void ijkmp_set_vout(IjkMediaPlayer *mp, SDL_Vout *vout)
 {
     mp->ffplayer->vout = vout;
diff --git a/ijkmediaplayer/jni/ijkplayer/ijkplayer_jni.c b/ijkmediaplayer/jni/ijkplayer/ijkplayer_jni.c
index be588d3f35756e6f3c3ff678c456c395ea0c6747..11cf8ead9f6fc201b195a82fda6a5f21a47b2404 100644
--- a/ijkmediaplayer/jni/ijkplayer/ijkplayer_jni.c
+++ b/ijkmediaplayer/jni/ijkplayer/ijkplayer_jni.c
@@ -251,7 +251,6 @@ IjkMediaPlayer_release(JNIEnv *env, jobject thiz)
 static void
 IjkMediaPlayer_reset(JNIEnv *env, jobject thiz)
 {
-    // FIXME: consider create new MediaPlayer
     IjkMediaPlayer *mp = jni_get_media_player(env, thiz);
     JNI_CHECK_GOTO(mp, env, NULL, "mpjni: reset: null mp", LABEL_RETURN);