diff --git a/movie.sh.in b/movie.sh.in
index 2bbd796..fa9242f 100755
--- a/movie.sh.in
+++ b/movie.sh.in
@@ -28,15 +28,9 @@ elif [ "-$1" == "-stop" ]; then
 	mkdir $GIGA_DIR/sm
 	kill `cat $2/audio.pid`
 	cd $GIGA_DIR
-	echo Message: Jp
-	@LIBEXECDIR@/mpegize.py jpegize $GIGA_DIR/ $FPS
-	echo Message: Mp
-	cd $GIGA_DIR/sm
-	@LIBEXECDIR@/mpegize.py convertall $GIGA_DIR/ $FPS
-	echo Message: Cl
-	mv $GIGA_DIR/smo/*.mp4 $DEST_NAME
+	@LIBEXECDIR@/mpegize.py convert $GIGA_DIR/ $DEST_NAME $FPS
 	rm -r $GIGA_DIR
-	echo Message: Ok
+	echo Message: Rec
 else
 	echo "Unrecognized command"
 fi
diff --git a/mpegize.py b/mpegize.py
index 5529e57..c249fa4 100755
--- a/mpegize.py
+++ b/mpegize.py
@@ -2,6 +2,11 @@
 # Copyright 2022, 2024 Pavel Machek, GPLv2+
 
 import os, sys, time, copy, subprocess
+import gi
+gi.require_version('Gst', '1.0')
+from gi.repository import Gst, GLib
+import os
+import time
 
 # https://stackoverflow.com/questions/11779490/how-to-add-a-new-audio-not-mixing-into-a-video-using-ffmpeg
 # https://ottverse.com/create-video-from-images-using-ffmpeg/
@@ -13,6 +18,349 @@ import os, sys, time, copy, subprocess
 # Usage: mpegize convert
 # head -c 1000 < /dev/zero > /tmp/delme.sm/1.foo.sa
 
+def gst_convert(mega_dir, out_file, use_jpeg):
+    def sa_read(name, t):
+        with open(name, "rb") as file:
+            rgb_data = file.read(10*1024*1024)
+
+        caps_string = "audio/x-raw,format=U16LE,channels=2,rate=48000,layout=interleaved,channel-mask=3"
+        caps = Gst.Caps.from_string(caps_string)
+
+        buffer = Gst.Buffer.new_wrapped(rgb_data)
+        if False:
+            time.sleep(1/30.)
+            # nanoseconds
+            buffer.pts = time.time() * 1000*1000*1000
+            buffer.dts = time.time() * 1000*1000*1000
+        elif True:
+            buffer.pts = t
+            buffer.dts = t
+        buffer.duration = (1000*1000*1000)/10.
+
+        return buffer, caps
+
+    def sa_src(appsrc):
+        def on_need_data(appsrc, data, length):
+            name = audio.get_path()
+            if name == None or name[-22:] != ".48000-s16le-stereo.sa":
+                appsrc.emit("end-of-stream")
+                print("End of audio stream")
+                return
+            t = audio.get_time()
+            #print("Audio: ", name, " need ", data, t)
+            audio.pop()
+            buffer, caps = sa_read(name, t)
+            appsrc.set_property("caps", caps)
+            appsrc.emit("push-buffer", buffer)
+
+        appsrc.set_property("format", Gst.Format.TIME)
+        appsrc.set_property("is-live", False)
+        appsrc.set_property("block", True)
+
+        name = audio.get_path()
+        buffer, caps = sa_read(name, 0)
+
+        appsrc.set_property("caps", caps)
+        #appsrc.emit("push-buffer", buffer)
+
+        s = appsrc.connect("need-data", on_need_data, "")
+        print("Connect", s)
+
+    class grwBase:
+        def init(m, dir):
+            m.dir = dir
+            m.list = os.listdir(dir)
+            m.list.sort()
+            m.slen = len(m.suffix)
+            m.start_time = 0
+            print("Movie", len(m.list))
+
+        def get_path(m):
+            s = m.get_name()
+            if s: return m.dir + s
+            return s
+
+        def get_name(m):
+            #print("Get path -- ")
+            while True:
+                if (len(m.list)) == 0:
+                    return None
+                #print("Get path: ", m.list[0], m.suffix)
+                if m.list[0][-m.slen:] != m.suffix:
+                    m.pop()
+                    continue
+                return m.list[0]
+
+        def get_time(m):
+            s = m.get_name()
+            s = s[:-m.slen]
+            return int(s) * 1000 - m.start_time
+
+        def pop(m):
+            m.list = m.list[1:]
+
+    class grwVideo(grwBase):
+        suffix = ".grw"
+        def __init__(m, dir):
+            m.init(dir)
+
+    class grwJPEG(grwBase):
+        suffix = ".jpeg.sv"
+        def __init__(m, dir):
+            m.init(dir + "sm/")
+
+    class grwAudio(grwVideo):
+        suffix = ".48000-s16le-stereo.sa"
+        def __init__(m, dir):
+            m.init(dir + "sm/")
+
+    def grw_read(name, t):
+        with open(name, "rb") as file:
+            rgb_data = file.read(10*1024*1024)
+        i = len(rgb_data)
+        i -= 1
+        while rgb_data[i] != 0:
+            i -= 1
+        footer = rgb_data[i+1:]
+        sp = str(footer, 'ascii').split('\n')
+        # Create caps for the file
+        caps_string = sp[0][6:]
+        caps = Gst.Caps.from_string(caps_string)
+        if sp[0][:6] != "Caps: ":
+            print("Bad footer")
+        if sp[1][:6] != "Size: ":
+            print("Bad footer")
+        if sp[-1] != "GRW":
+            print("Missing GRW footer")
+
+        buffer = Gst.Buffer.new_wrapped(rgb_data)
+        # This does not work for interactive use.
+        if False:
+            time.sleep(1/30.)
+            # nanoseconds
+            buffer.pts = time.time() * 1000*1000*1000
+            buffer.dts = time.time() * 1000*1000*1000
+        elif True:
+            buffer.pts = t
+            buffer.dts = t
+        buffer.duration = (1000*1000*1000)/30.
+
+        return buffer, caps
+
+    def grwsrc(appsrc):
+        def on_need_data(appsrc, data, length):
+            name = movie.get_path()
+            if name == None or name[-4:] != ".grw":
+                appsrc.emit("end-of-stream")
+                print("End of video stream")
+                return
+            t = movie.get_time()
+            #print("Video: ", name, t)
+            movie.pop()
+            buffer, caps = grw_read(name, t)
+            appsrc.set_property("caps", caps)
+            appsrc.emit("push-buffer", buffer)
+
+        appsrc.set_property("format", Gst.Format.TIME)
+        appsrc.set_property("is-live", False)
+        appsrc.set_property("block", True)
+
+        name = movie.get_path()
+        buffer, caps = grw_read(name, 0)
+
+        appsrc.set_property("caps", caps)
+        #appsrc.emit("push-buffer", buffer)
+
+        s = appsrc.connect("need-data", on_need_data, "")
+        print("Connect", s)
+
+    def jpeg_read(name, t):
+        with open(name, "rb") as file:
+            rgb_data = file.read(10*1024*1024)
+        i = len(rgb_data)
+        buffer = Gst.Buffer.new_wrapped(rgb_data)
+
+        caps_string = "image/jpeg"
+        caps = Gst.Caps.from_string(caps_string)
+
+        # This does not work for interactive use.
+        if False:
+            time.sleep(1/30.)
+            # nanoseconds
+            buffer.pts = time.time() * 1000*1000*1000
+            buffer.dts = time.time() * 1000*1000*1000
+        elif True:
+            buffer.pts = t
+            buffer.dts = t
+        buffer.duration = (1000*1000*1000)/30.
+
+        return buffer, caps
+
+    def jpeg_src(appsrc):
+        def on_need_data(appsrc, data, length):
+            name = movie.get_path()
+            if name == None or name[-8:] != ".jpeg.sv":
+                appsrc.emit("end-of-stream")
+                print("End of video stream")
+                return
+            t = movie.get_time()
+            #print("Video: ", name, t)
+            movie.pop()
+            buffer, caps = jpeg_read(name, t)
+            appsrc.set_property("caps", caps)
+            appsrc.emit("push-buffer", buffer)
+
+        appsrc.set_property("format", Gst.Format.TIME)
+        appsrc.set_property("is-live", False)
+        appsrc.set_property("block", True)
+
+        name = movie.get_path()
+        buffer, caps = jpeg_read(name, 0)
+
+        appsrc.set_property("caps", caps)
+        #appsrc.emit("push-buffer", buffer)
+
+        s = appsrc.connect("need-data", on_need_data, "")
+        print("Connect", s)
+
+    def v_src(appsrc):
+        if not use_jpeg:
+            grwsrc(appsrc)
+        else:
+            jpeg_src(appsrc)
+
+    count = 0
+    path = mega_dir
+    if use_jpeg:
+        movie = grwJPEG(path)
+    else:
+        movie = grwVideo(path)
+    audio = grwAudio(path)
+    t1 = movie.get_time()
+    t2 = audio.get_time()
+    tm = min(t1,t2)
+    print("Time base is", tm)
+    movie.start_time = tm
+    audio.start_time = tm
+
+    def pipeline_video():
+        if True:
+            s = "appsrc name=source"
+            if use_jpeg:
+                s += " ! jpegdec "
+        else:
+            s = "videotestsrc"
+            s += " ! video/x-raw,width=(int)640,height=(int)480,format=(string)RGB "
+        if False:
+            s += " ! videoconvert ! jpegenc"
+            s += " ! appsink name=sink"
+        elif True:
+            s += " ! videoconvert ! autovideosink"
+        else:
+            s += " ! videoconvert ! x264enc bitrate=3072 speed-preset=ultrafast ! matroskamux ! filesink location=" + out_file
+
+        pipeline = Gst.parse_launch(s)
+
+        p = pipeline.get_by_name("source")
+        if p:
+            if False:
+                mysrc(p)
+            else:
+                v_src(p)
+        p = pipeline.get_by_name("sink")
+        if p:
+            mysink(p)
+        return pipeline
+
+    def pipeline_audio():
+        # audiotestsrc ! audioconvert ! audioresample ! autoaudiosink
+        if True:
+            s = "appsrc name=source"    
+        else:
+            s = "audiotestsrc"
+
+        if True:
+            s += " ! audiobuffersplit ! audioconvert ! audioresample ! autoaudiosink"
+        else:
+            s += " ! ! ! "
+
+        pipeline = Gst.parse_launch(s)
+
+        p = pipeline.get_by_name("source")
+        if p:
+            sa_src(p)
+        p = pipeline.get_by_name("sink")
+        if p:
+            mysink(p)
+        return pipeline
+
+    def pipeline_both():
+        if True:
+            s = "appsrc name=asrc"
+        else:
+            s = "audiotestsrc"
+        # Audiobuffersplit creates problems with A/V synchronization, avoid.
+        #s += "! audiobuffersplit"
+        s += " ! audioconvert ! vorbisenc ! mux. "
+
+        if True:
+            s += "appsrc name=vsrc"
+            if use_jpeg:
+                s += " ! jpegdec "
+        else:
+            s += "videotestsrc"
+            s += " ! video/x-raw,width=(int)640,height=(int)480,format=(string)RGB "
+
+        s += " ! videoconvert ! x264enc bitrate=3072 speed-preset=ultrafast ! matroskamux name=mux"
+        if False:
+            s += " ! decodebin ! playsink"
+        else:
+            s += " ! filesink location="+out_file
+
+        pipeline = Gst.parse_launch(s)
+
+        p = pipeline.get_by_name("asrc")
+        if p:
+            sa_src(p)
+        p = pipeline.get_by_name("vsrc")
+        if p:
+            v_src(p)
+        return pipeline
+
+    Gst.init(None)
+    Gst.debug_set_default_threshold(Gst.DebugLevel.WARNING)
+    if False:
+        Gst.debug_set_default_threshold(Gst.DebugLevel.INFO)
+
+    if False:
+        pipeline = pipeline_video()
+    elif False:
+        pipeline = pipeline_audio()
+    else:
+        pipeline = pipeline_both()
+
+    # Function to handle end of stream
+    def on_eos(bus, message):
+        print("End of stream")
+        pipeline.set_state(Gst.State.NULL)
+        loop.quit()
+
+    # Set up bus to handle messages
+    bus = pipeline.get_bus()
+    bus.add_signal_watch()
+    bus.connect("message::eos", on_eos)
+
+    # Set the pipeline to the playing state
+    pipeline.set_state(Gst.State.PLAYING)
+
+    # Run the main loop to handle GStreamer events
+    loop = GLib.MainLoop()
+    try:
+        loop.run()
+    except KeyboardInterrupt:
+        pipeline.set_state(Gst.State.NULL)
+        loop.quit()
+
 class Mpegize:
     base = '/tmp/delme.'
     fps = 30.5
@@ -48,14 +396,22 @@ class Mpegize:
         return s[2], s[1], i
 
     def help(m):
-        print("mpegize command base-dir")
+        print("mpegize command base-dir destination-movie fps")
 
     def run(m, argv):
         if len(argv) > 2:
             m.base = argv[2]
             mode = argv[1]
-            if mode == "stat" or mode == "convert" or mode == "gc" or mode == "convertall":
-                m.process(mode)
+            if mode == "convert":
+                print("Phase 1: jpegize")
+                print("Message: 0%%")
+                sys.stdout.flush()
+                m.prepare()
+                m.jpegize()
+                print("Phase 2: mpegize -- ", argv[3])
+                print("Message: enc")
+                sys.stdout.flush()
+                gst_convert(m.base, argv[3], True)
                 return
             if mode == "gaps":
                 print("Video gaps")
@@ -87,131 +443,12 @@ class Mpegize:
         print("Total", num, "gaps of", total)
         print("Expected", (1000000 / m.fps) / 1000., "msec, limit", limit / 1000., "msec")
 
-    def process(m, mode):
-        m.prepare_source()
-        photos = 0
-        video_frames = 0
-        start = 0
-        for n in m.frames:
-            ext, mid, i = m.parse_frame(n)
-            if ext != "mark":
-                continue
-            print(n)
-            if mid == "start":
-                start = i
-            if mid == "stop":
-                video_frames += m.extract_video(start, i, mode)
-                start = 0
-            if mid == "wow":
-                if start:
-                    start -= 5000000
-                else:
-                    photos += 5
-                    m.extract_photo(i - 1000000, mode)
-                    m.extract_photo(i - 2000000, mode)
-                    m.extract_photo(i - 3000000, mode)
-                    m.extract_photo(i - 4000000, mode)
-                    m.extract_photo(i - 5000000, mode)
-            if mid == "photo":
-                photos += 1
-                m.extract_photo(i, mode)
-        if mode == "convertall":
-            video_frames += m.extract_video(0, 9999999999999999, "convert")
-            return
-        print("Total", photos, "photos and", m.display_frames(video_frames))
-        print(len(m.unused_frames), "/", len(m.frames))
-        if mode == "gc":
-            os.chdir(m.source)
-            for n in m.unused_frames:
-                os.unlink(n)
-            print(m.unused_frames)
-
     def display_usec(m, v):
         return "%.2f sec" % (v/1000000.)
 
     def display_frames(m, v):
         return "%d frames %s" % (v, m.display_usec(v * 1000000 / 30.))
 
-    def frame_used(m, n):
-        if n in m.unused_frames:
-            m.unused_frames.remove(n)
-
-    def extract_photo(m, around, mode):
-        print("Photo:", around)
-        best = None
-        for n in m.frames:
-            ext, mid, i = m.parse_frame(n)
-            if ext != "sv":
-                continue
-            if i < around:
-                best = n
-                continue
-            best = n
-            break
-
-        m.frame_used(best)
-        out_file = m.output+"/image-%04d.jpeg" % m.out_index
-        m.out_index += 1
-        if mode == "convert":
-            os.system("ln "+m.source+"/"+best+" "+out_file)
-
-    def extract_video(m, start, end, mode):
-        print("Searching video", start, end, "--", m.display_usec(end-start))
-        if mode == "convert":
-            m.prepare_work()
-        t1 = time.time()
-        seen_audio = False
-        seen_video = False
-        count = 0
-        skip_audio = 0
-        skip_video = 0
-        num = 0
-        for n in m.frames:
-            num += 1
-            if not num % 1000:
-                print("Frame", num)
-            ext, mid, i = m.parse_frame(n)
-            if ext != "sa" and ext != "sv":
-                m.frame_used(n)
-                continue
-            if i < start - 1000000 or i > end:
-                continue
-            if ext == "sa":
-                seen_audio = True
-                if not seen_video:
-                    continue
-                if mode == "convert":
-                    os.system("cat "+m.source+"/"+n+" >> "+m.work+"/output.raw")
-            if ext == "sv":
-                if not seen_video:
-                    first_video = i
-                    seen_video = True
-                if mode == "convert":
-                    os.system("ln "+m.source+"/"+n+" "+m.work+"/image-%06d.jpeg" % count)
-                count += 1
-                while i >= first_video + count * 1000000 / m.fps:
-                    print("Duplicating video frame at", i)
-                    if mode == "convert":
-                        os.system("ln "+m.source+"/"+n+" "+m.work+"/image-%06d.jpeg" % count)
-                    count += 1
-            m.frame_used(n)
-
-        if mode == "convert":
-            os.chdir(m.work)
-            print("Converting", m.display_frames(count), "skipped", skip_audio, "audio and", skip_video, "video frames")
-            os.system("ffmpeg -f s16le -ac 2  -ar 48000 -i output.raw output.wav")
-            options = "-b:v 4096k -c:v libx264 -preset ultrafast"
-            os.system("ffmpeg -framerate %d -i image-%%06d.jpeg -i output.wav %s output.mp4" % (m.fps, options))
-            os.system("rm output.raw")
-            out_file = m.output+"/video-%04d.mp4" % m.out_index
-            m.out_index += 1
-            os.system("mv output.mp4 "+out_file)
-        print("Converted", m.display_frames(count), "in", "%.1f" % (time.time()-t1), "seconds")
-        if mode == "convert":
-            print("Original size -> new size")
-            os.system("du -sh .; du -sh "+out_file)
-        return count
-
     def jpegize(m):
         i = 0
         os.chdir(m.base)
@@ -225,7 +462,8 @@ class Mpegize:
                 print("Something went terribly wrong")
                 continue
             i += 1
-            print(i, '/', len(l))
+            print("Message: %.0f%%" % ((100*i) / len(l)))
+            sys.stdout.flush()
             base = n[:-4]
             subprocess.run(['dcraw',
                             '-w',      # -w Use camera white balance