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import wx
HEADERS_ROW = 0
START_ROW = 1
END_ROW = 2
DURATION_ROW = 3
WIDTH_ROW = 4
HEIGHT_ROW = 5
FRAMERATE_ROW = 6
LABEL_COL = 0
ORIG_COL = 1
EDIT_BOX_COL = 2
NEW_COL = 3
class Property:
def __init__(self, parent, name, *, label=None, orig=None, edit=None, new_class=None, new=None):
self.handlers = []
if label is None:
label = wx.StaticText(parent, label=name)
self.label = label
if orig is None:
orig = wx.StaticText(parent, label="N/A")
self.orig = orig
if edit is None:
edit = wx.CheckBox(parent)
edit.Bind(wx.EVT_CHECKBOX, self.handle_edit)
self.edit = edit
if new is None:
if new_class is None:
new_class = wx.TextCtrl
new = new_class(parent)
new.Bind(wx.EVT_SPINCTRLDOUBLE, self.handle_change)
new.Bind(wx.EVT_SPINCTRL, self.handle_change)
new.Disable()
self.new = new
def add_to(self, sizer, row):
sizer.Add(self.label, wx.GBPosition(row, LABEL_COL))
sizer.Add(self.orig, wx.GBPosition(row, ORIG_COL))
sizer.Add(self.edit, wx.GBPosition(row, EDIT_BOX_COL))
sizer.Add(self.new, wx.GBPosition(row, NEW_COL), flag=wx.EXPAND)
def disable(self):
self.enable(False)
def enable(self, enabled=True):
if enabled:
self.edit.Enable()
else:
self.edit.SetValue(False)
self.edit.Disable()
self.new.Disable()
def is_edit(self):
return self.edit.GetValue()
def set_orig(self, val):
self.orig.SetLabel(str(val))
def get_orig(self):
return self.orig.GetLabel()
def set_calc_new(self, val):
if not self.is_edit():
if self.new.GetMin() > val:
self.new.SetMin(val)
if self.new.GetMax() < val:
self.new.SetMax(val)
self.new.SetValue(val)
def set_range(self, min, max):
self.new.SetRange(min, max)
def get_final(self):
if self.edit.GetValue():
return self.new.GetValue()
else:
return self.orig.GetLabel()
def handle_edit(self, _event):
self.new.Enable(self.edit.GetValue())
self.handle_change(None)
def on_change(self, callback):
self.handlers.append(callback)
def handle_change(self, _event):
for handler in self.handlers:
handler()
class OptionsPanel(wx.Panel):
"""
A Panel displaying ffmpeg options
"""
def __init__(self, *args, **kw):
super(OptionsPanel, self).__init__(*args, **kw)
root_sizer = wx.StaticBoxSizer(wx.VERTICAL, self, label="Options")
self.SetSizer(root_sizer)
main = wx.Panel(self)
root_sizer.Add(main, proportion=1, flag=wx.EXPAND, border=5)
main_sizer = wx.GridBagSizer(5, 5)
main.SetSizer(main_sizer)
def make_header(text):
st = wx.StaticText(main, label=text, style=wx.ALIGN_CENTER_HORIZONTAL)
st.SetFont(st.GetFont().Bold())
return st
main_sizer.Add(make_header("Field"), wx.GBPosition(HEADERS_ROW, LABEL_COL), flag=wx.EXPAND)
main_sizer.Add(make_header("Original Value"), wx.GBPosition(HEADERS_ROW, ORIG_COL), flag=wx.EXPAND)
main_sizer.Add(make_header("Edit?"), wx.GBPosition(HEADERS_ROW, EDIT_BOX_COL), flag=wx.EXPAND)
main_sizer.Add(make_header("New Value"), wx.GBPosition(HEADERS_ROW, NEW_COL), flag=wx.EXPAND)
self.start_time = Property(main, "Start time (seconds)", new_class=wx.SpinCtrlDouble)
self.start_time.add_to(main_sizer, START_ROW)
self.start_time.on_change(self.enforce_constraints)
self.end_time = Property(main, "End time (seconds)", new_class=wx.SpinCtrlDouble)
self.end_time.add_to(main_sizer, END_ROW)
self.end_time.on_change(self.enforce_constraints)
self.duration = Property(main, "Duration (seconds)", new_class=wx.SpinCtrlDouble)
self.duration.add_to(main_sizer, DURATION_ROW)
self.duration.on_change(self.enforce_constraints)
self.width = Property(main, "Width", new_class=wx.SpinCtrl)
self.width.add_to(main_sizer, WIDTH_ROW)
self.width.on_change(self.enforce_constraints)
self.height = Property(main, "Height", new_class=wx.SpinCtrl)
self.height.add_to(main_sizer, HEIGHT_ROW)
self.height.on_change(self.enforce_constraints)
self.framerate = Property(main, "Framerate", new_class=wx.SpinCtrlDouble)
self.framerate.add_to(main_sizer, FRAMERATE_ROW)
self.framerate.on_change(self.enforce_constraints)
self.Disable()
def enforce_constraints(self):
self.start_time.enable()
self.end_time.enable()
self.duration.enable()
orig_start = float(self.start_time.get_orig())
orig_end = float(self.end_time.get_orig())
orig_duration = float(self.duration.get_orig())
if self.start_time.is_edit() and self.end_time.is_edit():
new_start = float(self.start_time.get_final())
new_end = float(self.end_time.get_final())
new_duration = new_end - new_start
self.start_time.set_range(orig_start, new_end)
self.end_time.set_range(new_start, orig_end)
self.duration.disable()
self.duration.set_calc_new(new_duration)
elif self.start_time.is_edit() and self.duration.is_edit():
new_start = float(self.start_time.get_final())
new_duration = float(self.duration.get_final())
new_end = new_start + new_duration
self.start_time.set_range(orig_start, orig_end - new_duration)
self.duration.set_range(0, orig_end - new_start)
self.end_time.disable()
self.end_time.set_calc_new(new_end)
elif self.end_time.is_edit() and self.duration.is_edit():
new_end = float(self.end_time.get_final())
new_duration = float(self.duration.get_final())
new_start = new_end - new_duration
self.end_time.set_range(orig_start + new_duration, orig_end)
self.duration.set_range(0, new_end - orig_start)
self.start_time.disable()
self.start_time.set_calc_new(new_start)
else:
new_start = float(self.start_time.get_final())
new_end = float(self.end_time.get_final())
new_duration = new_end - new_start
if self.duration.is_edit():
new_duration = float(self.duration.get_final())
new_end = new_start + new_duration
self.start_time.set_range(orig_start, orig_end)
self.end_time.set_range(orig_start, orig_end)
self.duration.set_range(0, orig_duration)
self.start_time.set_calc_new(new_start)
self.end_time.set_calc_new(new_end)
self.duration.set_calc_new(new_duration)
orig_width = int(self.width.get_orig())
orig_height = int(self.height.get_orig())
new_width = int(self.width.get_final())
new_height = int(self.height.get_final())
self.width.set_range(1, 10 * orig_width)
self.height.set_range(1, 10 * orig_height)
self.width.set_calc_new(round(orig_width / orig_height * new_height))
self.height.set_calc_new(round(orig_height / orig_width * new_width))
orig_framerate = float(self.framerate.get_orig())
self.framerate.set_range(0, orig_framerate)
self.framerate.set_calc_new(orig_framerate)
def update(self, info):
import fractions
if info is None:
self.Disable()
else:
start_time = float(info['format']['start_time'])
self.start_time.set_orig(start_time)
duration = float(info['format']['duration'])
self.duration.set_orig(duration)
self.end_time.set_orig(start_time + duration)
video_stream = [stream for stream in info['streams'] if stream['codec_type'] == 'video'][0]
self.width.set_orig(video_stream['width'])
self.height.set_orig(video_stream['height'])
framerate = round(float(fractions.Fraction(video_stream['avg_frame_rate'])), 3)
self.framerate.set_orig(framerate)
self.Enable()
self.Layout()
self.enforce_constraints()
def ffmpeg_opts(self):
opts = []
if self.start_time.is_edit():
opts += ['-ss', str(self.start_time.get_final())]
elif self.end_time.is_edit() and self.duration.is_edit():
new_end = float(self.end_time.get_final())
new_duration = float(self.duration.get_final())
new_start = new_end - new_duration
opts += ['-ss', str(new_start)]
if self.end_time.is_edit():
opts += ['-to', str(self.end_time.get_final())]
if self.duration.is_edit():
opts += ['-t', str(self.duration.get_final())]
if self.width.is_edit() or self.height.is_edit():
width = str(self.width.get_final())
height = str(self.height.get_final())
if not self.width.is_edit():
width = "-1"
if not self.height.is_edit():
height = "-1"
opts += ['-vf', 'scale=' + width + ':' + height]
if self.framerate.is_edit():
opts += ['-r', str(self.framerate.get_final())]
return opts
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