Implemented VCR capture using forward slow instead of stepping.
Also added a 'rate' field to specify the capture rate in this case.
diff --git a/Demo/sgi/video/Vb.py b/Demo/sgi/video/Vb.py
index e6fecdf..0a0ced1 100755
--- a/Demo/sgi/video/Vb.py
+++ b/Demo/sgi/video/Vb.py
@@ -118,7 +118,7 @@
self.in_maxmem.set_input('1.0')
self.in_nframes.set_input('0')
self.in_nframes_vcr.set_input('1')
- self.in_sleeptime.set_input('1.0')
+ self.in_rate_vcr.set_input('1')
# Audio defaults
self.aout = None
self.aport = None
@@ -200,6 +200,13 @@
def reset(self):
self.close_video()
self.close_audio()
+ if self.vcr:
+ try:
+ ok = self.vcr.still()
+ except VCR.error:
+ pass
+ self.vcr = None
+ self.b_capture.set_button(0)
# Event handler (catches resize of video window)
@@ -277,7 +284,7 @@
def cb_nframes_vcr(self, *args):
pass
- def cb_sleeptime(self, *args):
+ def cb_rate_vcr(self, *args):
pass
# Audio controls: format, file
@@ -319,6 +326,7 @@
self.reset()
def cb_play(self, *args):
+ self.reset()
sts = os.system('Vplay -q ' + self.vfile + ' &')
def cb_quit(self, *args):
@@ -411,7 +419,9 @@
self.stop_audio()
self.capturing = 0
self.end_cont()
- self.reset()
+ if self.aout:
+ # If recording audio, can't capture multiple sequences
+ self.reset()
self.b_capture.label = saved_label
def single_capture(self):
@@ -436,22 +446,66 @@
try:
self.vcr = VCR.VCR().init()
self.vcr.wait()
- self.vcr.fmmode('dnr')
+ if not (self.vcr.fmmode('dnr') and \
+ self.vcr.dmcontrol('digital slow')):
+ self.vcr_error('digital slow failed')
+ return
except VCR.error, msg:
self.vcr = None
- self.b_capture.set_button(0)
- fl.show_message('VCR error', str(msg), '')
+ self.vcr_error(msg)
return
- count = self.getint(self.in_nframes_vcr, 1)
- if count <= 0: count = 1
- sleeptime = self.getfloat(self.in_sleeptime, 1.0)
- for i in range(count):
- if i > 0:
- time.sleep(sleeptime)
- if not self.single_capture():
+ if not self.vcr.still():
+ self.vcr_error('still failed')
+ return
+ # XXX for some reason calling where() too often hangs the VCR,
+ # XXX so we insert sleep(0.1) before every sense() call.
+ self.open_if_closed()
+ rate = self.getint(self.in_rate_vcr, 1)
+ rate = max(rate, 1)
+ self.speed_factor = rate
+ addr = self.vcr.sense()
+ if not self.single_capture():
+ return
+ print 'captured %02d:%02d:%02d:%02d' % self.vcr.addr2tc(addr)
+ count = self.getint(self.in_nframes_vcr, 1) - 1
+ if count <= 0:
+ while rate > 0:
+ if not self.vcr.step():
+ self.vcr_error('step failed')
+ here = self.vcr.sense()
+ if here > addr:
+ rate = rate - (here - addr)
+ addr = here
+ return
+ if not self.vcr.fwdshuttle(2): # one tenth speed
+ self.vcr_error('fwd shuttle failed')
+ return
+ cycle = 0
+ while count > 0:
+ time.sleep(0.1)
+ try:
+ here = self.vcr.sense()
+ except VCR.error, msg:
+ self.vcr_error(msg)
break
- if not self.vcr.step():
- break
+ if here <> addr:
+ if here <> addr+1:
+ print 'Missed', here-addr-1,
+ print 'frame' + 's'*(here-addr-1 <> 1)
+ cycle = (cycle+1) % rate
+ if cycle == 0:
+ if not self.single_capture():
+ break
+ print 'captured %02d:%02d:%02d:%02d' \
+ % self.vcr.addr2tc(here)
+ count = count -1
+ addr = here
+ if self.vcr and not self.vcr.still():
+ self.vcr_error('still failed')
+
+ def vcr_error(self, msg):
+ self.reset()
+ fl.show_message('VCR error:', str(msg), '')
# Init/end continuous capture mode
@@ -551,12 +605,14 @@
vout.writeheader()
self.vout = vout
self.nframes = 0
+ self.speed_factor = 1
self.t_nframes.label = `self.nframes`
def write_frame(self, t, data):
+ t = t * self.speed_factor
if not self.vout:
gl.ringbell()
- return
+ return 0
if self.convertor:
data = self.convertor(data, len(data), 1)
elif self.mono:
@@ -570,6 +626,7 @@
try:
self.vout.writeframe(int(t), data, None)
except IOError, msg:
+ self.reset()
if msg == (0, 'Error 0'):
msg = 'disk full??'
fl.show_message('IOError', str(msg), '')
diff --git a/Demo/sgi/video/VbForm.fd b/Demo/sgi/video/VbForm.fd
index 1c0be37..ef58488 100644
--- a/Demo/sgi/video/VbForm.fd
+++ b/Demo/sgi/video/VbForm.fd
@@ -29,7 +29,7 @@
--------------------
class: 11
type: 5
-box: 330.000000 170.000000 110.000015 60.000004
+box: 330.000000 130.000000 110.000015 60.000004
boxtype: 1
colors: 47 47
alignment: 4
@@ -89,7 +89,7 @@
--------------------
class: 11
type: 0
-box: 330.000000 90.000000 110.000000 30.000000
+box: 330.000000 200.000000 110.000000 30.000000
boxtype: 1
colors: 47 47
alignment: 4
@@ -419,7 +419,7 @@
--------------------
class: 2
type: 0
-box: 390.000000 130.000000 50.000000 30.000002
+box: 390.000000 90.000000 50.000000 30.000002
boxtype: 2
colors: 47 47
alignment: 2
@@ -434,7 +434,7 @@
--------------------
class: 2
type: 0
-box: 320.000000 130.000000 60.000000 30.000000
+box: 320.000000 90.000000 60.000000 30.000000
boxtype: 0
colors: 47 47
alignment: 2
@@ -451,7 +451,7 @@
type: 0
box: 0.000000 0.000000 0.000000 0.000000
boxtype: 0
-colors: 0 0
+colors: 1147496041 1852404841
alignment: 4
style: 0
size: 11.000000
@@ -478,7 +478,7 @@
--------------------
class: 31
-type: 1
+type: 2
box: 220.000000 170.000000 100.000000 30.000000
boxtype: 2
colors: 13 5
@@ -486,9 +486,9 @@
style: 0
size: 11.000000
lcol: 0
-label: Delay:
-name: in_sleeptime
-callback: cb_sleeptime
+label: Sample rate:
+name: in_rate_vcr
+callback: cb_rate_vcr
argument: 0
--------------------
@@ -496,7 +496,7 @@
type: 0
box: 0.000000 0.000000 0.000000 0.000000
boxtype: 0
-colors: 0 0
+colors: 544171552 1331849829
alignment: 4
style: 0
size: 11.000000