Stutter at t=2 sec when streaming to FFmpeg

[JonathonReinhart]

I did however notice (regardless of this change) that about 2 seconds into
recording to x264, the write() calls begin to take a very long time. Where
they normally take 1-2 ms, they begin to take 100-400 ms, sometimes over
a second!

• Happens regardless of -use_wallclock_as_timestamps 1

[JonathonReinhart]

With this patch:

diff --git a/spice-record b/spice-record
index 1bdca56..78ff88d 100755
--- a/spice-record
+++ b/spice-record
@@ -123,7 +123,13 @@ class Display32RGB(Display):
     ffmpeg_pix_fmt = 'bgr0'     # Each pixel is 4 bytes: BGR0,BGR0,...
 
     def _do_write_frame(self):
-        return self.outfile.write(self.imgdata.contents)
+        t0 = time.time()
+        b = self.outfile.write(self.imgdata.contents)
+        dt = time.time() - t0
+
+        ms = int(dt * 1000)
+        print("{:04} ms ".format(ms) + '*'*ms)
+        return b
 
 
 class SpiceRecorder(GObject.GObject):

log_showing_startup_delay.txt