mirror of https://github.com/python/cpython
Implemented VCR capture using forward slow instead of stepping.
Also added a 'rate' field to specify the capture rate in this case.
This commit is contained in:
Guido van Rossum
parent
c17c84fbe3
commit
ad4fcd49fc
|
|
@ -118,7 +118,7 @@ class VideoBagOfTricks:
|
|||
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 @@ class VideoBagOfTricks:
|
|||
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 @@ class VideoBagOfTricks:
|
|||
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 @@ class VideoBagOfTricks:
|
|||
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 @@ class VideoBagOfTricks:
|
|||
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 @@ class VideoBagOfTricks:
|
|||
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():
|
||||
break
|
||||
if not self.vcr.step():
|
||||
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 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 @@ class VideoBagOfTricks:
|
|||
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 @@ class VideoBagOfTricks:
|
|||
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), '')
|
||||
|
|
|
|||
|
|
@ -29,7 +29,7 @@ argument:
|
|||
--------------------
|
||||
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 @@ argument: 0
|
|||
--------------------
|
||||
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 @@ argument:
|
|||
--------------------
|
||||
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 @@ argument:
|
|||
--------------------
|
||||
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 @@ class: 10000
|
|||
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 @@ argument: 0
|
|||
|
||||
--------------------
|
||||
class: 31
|
||||
type: 1
|
||||
type: 2
|
||||
box: 220.000000 170.000000 100.000000 30.000000
|
||||
boxtype: 2
|
||||
colors: 13 5
|
||||
|
|
@ -486,9 +486,9 @@ alignment: 0
|
|||
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 @@ class: 20000
|
|||
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
|
||||
|
|
|
|||
Loading…
Reference in New Issue