diff --git a/doc/indevs.texi b/doc/indevs.texi
index 36aef49..0bc8e6a 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -298,11 +298,13 @@ Sets the audio input source. Must be @samp{unset}, @samp{embedded},
 
 @item video_pts
 Sets the video packet timestamp source. Must be @samp{video}, @samp{audio},
-@samp{reference} or @samp{wallclock}. Defaults to @samp{video}.
+@samp{reference}, @samp{wallclock} or @samp{abs_wallclock}.
+Defaults to @samp{video}.
 
 @item audio_pts
 Sets the audio packet timestamp source. Must be @samp{video}, @samp{audio},
-@samp{reference} or @samp{wallclock}. Defaults to @samp{audio}.
+@samp{reference}, @samp{wallclock} or @samp{abs_wallclock}.
+Defaults to @samp{audio}.
 
 @item draw_bars
 If set to @samp{true}, color bars are drawn in the event of a signal loss.
diff --git a/libavdevice/decklink_common_c.h b/libavdevice/decklink_common_c.h
index 18097e2..08e9f9b 100644
--- a/libavdevice/decklink_common_c.h
+++ b/libavdevice/decklink_common_c.h
@@ -28,6 +28,7 @@ typedef enum DecklinkPtsSource {
     PTS_SRC_VIDEO     = 2,
     PTS_SRC_REFERENCE = 3,
     PTS_SRC_WALLCLOCK = 4,
+    PTS_SRC_ABS_WALLCLOCK = 5,
     PTS_SRC_NB
 } DecklinkPtsSource;
 
diff --git a/libavdevice/decklink_dec.cpp b/libavdevice/decklink_dec.cpp
index 1fd40ca..a69e286 100644
--- a/libavdevice/decklink_dec.cpp
+++ b/libavdevice/decklink_dec.cpp
@@ -585,6 +585,7 @@ ULONG decklink_input_callback::Release(void)
 static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
                            IDeckLinkAudioInputPacket *audioFrame,
                            int64_t wallclock,
+                           int64_t abs_wallclock,
                            DecklinkPtsSource pts_src,
                            AVRational time_base, int64_t *initial_pts,
                            int copyts)
@@ -607,13 +608,18 @@ static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
                 res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);
             break;
         case PTS_SRC_WALLCLOCK:
+            /* fall through */
+        case PTS_SRC_ABS_WALLCLOCK:
         {
             /* MSVC does not support compound literals like AV_TIME_BASE_Q
              * in C++ code (compiler error C4576) */
             AVRational timebase;
             timebase.num = 1;
             timebase.den = AV_TIME_BASE;
-            pts = av_rescale_q(wallclock, timebase, time_base);
+            if (pts_src == PTS_SRC_WALLCLOCK)
+                pts = av_rescale_q(wallclock, timebase, time_base);
+            else
+                pts = av_rescale_q(abs_wallclock, timebase, time_base);
             break;
         }
     }
@@ -637,7 +643,7 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
     void *audioFrameBytes;
     BMDTimeValue frameTime;
     BMDTimeValue frameDuration;
-    int64_t wallclock = 0;
+    int64_t wallclock = 0, abs_wallclock = 0;
     struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
 
     if (ctx->autodetect) {
@@ -652,6 +658,8 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
     ctx->frameCount++;
     if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK)
         wallclock = av_gettime_relative();
+    if (ctx->audio_pts_source == PTS_SRC_ABS_WALLCLOCK || ctx->video_pts_source == PTS_SRC_ABS_WALLCLOCK)
+        abs_wallclock = av_gettime();
 
     // Handle Video Frame
     if (videoFrame) {
@@ -698,7 +706,7 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
             no_video = 0;
         }
 
-        pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts, cctx->copyts);
+        pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts, cctx->copyts);
         pkt.dts = pkt.pts;
 
         pkt.duration = frameDuration;
@@ -789,7 +797,7 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
         pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (ctx->audio_depth / 8);
         audioFrame->GetBytes(&audioFrameBytes);
         audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
-        pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts, cctx->copyts);
+        pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts, cctx->copyts);
         pkt.dts = pkt.pts;
 
         //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);
diff --git a/libavdevice/decklink_dec_c.c b/libavdevice/decklink_dec_c.c
index accae53..47018dc 100644
--- a/libavdevice/decklink_dec_c.c
+++ b/libavdevice/decklink_dec_c.c
@@ -70,6 +70,7 @@ static const AVOption options[] = {
     { "video",         NULL,                                          0,  AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_VIDEO    }, 0, 0, DEC, "pts_source"},
     { "reference",     NULL,                                          0,  AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_REFERENCE}, 0, 0, DEC, "pts_source"},
     { "wallclock",     NULL,                                          0,  AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_WALLCLOCK}, 0, 0, DEC, "pts_source"},
+    { "abs_wallclock", NULL,                                          0,  AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_ABS_WALLCLOCK}, 0, 0, DEC, "pts_source"},
     { "draw_bars",     "draw bars on signal loss" , OFFSET(draw_bars),    AV_OPT_TYPE_BOOL,  { .i64 = 1}, 0, 1, DEC },
     { "queue_size",    "input queue buffer size",   OFFSET(queue_size),   AV_OPT_TYPE_INT64, { .i64 = (1024 * 1024 * 1024)}, 0, INT64_MAX, DEC },
     { "audio_depth",   "audio bitdepth (16 or 32)", OFFSET(audio_depth),  AV_OPT_TYPE_INT,   { .i64 = 16}, 16, 32, DEC },
