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import typing
from tkinter import *
from tkinter import ttk
HEADERS_ROW = 0
START_ROW = 1
END_ROW = 2
DURATION_ROW = 3
WIDTH_ROW = 4
HEIGHT_ROW = 5
FRAMERATE_ROW = 6
CROP_TOP_ROW = 7
CROP_BOTTOM_ROW = 8
CROP_LEFT_ROW = 9
CROP_RIGHT_ROW = 10
LABEL_COL = 0
ORIG_COL = 1
EDIT_BOX_COL = 2
NEW_COL = 3
class FFmpegOptions:
def __init__(self, input, output, vf):
self.input = input
self.output = output
self.vf = vf
def output_with_vf(self):
if len(self.vf) > 0:
return self.output + ['-vf', ','.join(self.vf)]
else:
return self.output
class Property:
def __init__(self, parent, name, row, convert: typing.Callable = int):
self.handlers = []
ttk.Label(parent, text=name).grid(column=LABEL_COL, row=row, sticky=(E, W))
self.orig = StringVar(parent, value="N/A")
ttk.Label(parent, textvariable=self.orig).grid(column=ORIG_COL, row=row, sticky=(E, W))
self.edit = BooleanVar(parent)
self.edit_widget = ttk.Checkbutton(parent, variable=self.edit, command=self.handle_edit)
self.edit_widget.grid(column=EDIT_BOX_COL, row=row, sticky=(E, W))
self.new = ttk.Spinbox(parent, command=self.handle_change)
self.new.state(['disabled'])
self.new.grid(column=NEW_COL, row=row, sticky=(E, W))
self.convert = convert
self.disable()
def disable(self):
self.enable(False)
def enable(self, enabled=True):
if enabled:
self.edit_widget.state(['!disabled'])
else:
self.edit.set(False)
self.edit_widget.state(['disabled'])
self.new.state(['disabled'])
def is_enabled(self):
return self.edit_widget.instate(['!disabled'])
def is_edit(self):
return self.edit.get()
def set_orig(self, val):
self.orig.set(str(val))
def get_orig(self):
return self.orig.get()
def set_calc_new(self, val):
if not self.is_edit():
if self.convert(self.new['from']) > val:
self.new.configure(from_=val)
if self.convert(self.new['to']) < val:
self.new.configure(to=val)
self.new.set(val)
def set_range(self, min, max):
self.new.configure(from_=min, to=max)
def get_final(self):
if len(self.new.get()) == 0:
return self.orig.get()
return self.new.get()
def handle_edit(self, *args):
if self.edit.get():
self.new.state(['!disabled'])
else:
self.new.state(['disabled'])
self.handle_change(None)
def on_change(self, callback):
self.handlers.append(callback)
def handle_change(self, *args):
for handler in self.handlers:
handler()
class OptionsPanel(ttk.LabelFrame):
"""
A Panel displaying ffmpeg options
"""
def __init__(self, *args, **kw):
super(OptionsPanel, self).__init__(*args, text="Options", **kw)
def place_header(text, **kwargs):
ttk.Label(self, text=text, font='TkHeadingFont', justify='center', anchor='center'
).grid(sticky=(E, W), **kwargs)
place_header("Field", column=LABEL_COL, row=HEADERS_ROW)
place_header("Original Value", column=ORIG_COL, row=HEADERS_ROW)
place_header("Edit?", column=EDIT_BOX_COL, row=HEADERS_ROW)
place_header("New Value", column=NEW_COL, row=HEADERS_ROW)
self.start_time = Property(self, "Start time (seconds)", START_ROW, float)
self.start_time.on_change(self.enforce_constraints)
self.end_time = Property(self, "End time (seconds)", END_ROW, float)
self.end_time.on_change(self.enforce_constraints)
self.duration = Property(self, "Duration (seconds)", DURATION_ROW, float)
self.duration.on_change(self.enforce_constraints)
self.width = Property(self, "Width", WIDTH_ROW, int)
self.width.on_change(self.enforce_constraints)
self.height = Property(self, "Height", HEIGHT_ROW, int)
self.height.on_change(self.enforce_constraints)
self.framerate = Property(self, "Framerate", FRAMERATE_ROW, float)
self.framerate.on_change(self.enforce_constraints)
self.crop_top = Property(self, "Crop Top", CROP_TOP_ROW, int)
self.crop_top.on_change(self.enforce_constraints)
self.crop_bottom = Property(self, "Crop Bottom", CROP_BOTTOM_ROW, int)
self.crop_bottom.on_change(self.enforce_constraints)
self.crop_left = Property(self, "Crop Left", CROP_LEFT_ROW, int)
self.crop_left.on_change(self.enforce_constraints)
self.crop_right = Property(self, "Crop Right", CROP_RIGHT_ROW, int)
self.crop_right.on_change(self.enforce_constraints)
for child in self.winfo_children():
child.grid_configure(padx=2, pady=2)
self.state(['disabled'])
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)
if self.width.is_enabled() and self.height.is_enabled():
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))
self.crop_top.set_calc_new(0)
self.crop_top.set_range(0, int(self.height.get_final()) - int(self.crop_bottom.get_final()))
self.crop_bottom.set_calc_new(0)
self.crop_bottom.set_range(0, int(self.height.get_final()) - int(self.crop_top.get_final()))
self.crop_right.set_calc_new(0)
self.crop_right.set_range(0, int(self.width.get_final()) - int(self.crop_left.get_final()))
self.crop_left.set_calc_new(0)
self.crop_left.set_range(0, int(self.width.get_final()) - int(self.crop_right.get_final()))
if self.framerate.is_enabled():
orig_framerate = float(self.framerate.get_orig())
self.framerate.set_range(0, orig_framerate)
self.framerate.set_calc_new(orig_framerate)
def update_info(self, info):
import fractions
if info is None:
self.state(['disabled'])
for prop in [self.start_time, self.duration, self.end_time, self.width, self.height, self.framerate]:
prop.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_streams = [stream for stream in info['streams'] if
stream['codec_type'] == 'video' and stream['avg_frame_rate'] != '0/0']
if len(video_streams) > 0:
video_stream = video_streams[0]
self.width.enable()
self.width.set_orig(video_stream['width'])
self.height.enable()
self.height.set_orig(video_stream['height'])
self.crop_top.enable()
self.crop_top.set_orig(0)
self.crop_bottom.enable()
self.crop_bottom.set_orig(0)
self.crop_left.enable()
self.crop_left.set_orig(0)
self.crop_right.enable()
self.crop_right.set_orig(0)
framerate = round(float(fractions.Fraction(video_stream['avg_frame_rate'])), 3)
self.framerate.enable()
self.framerate.set_orig(framerate)
else:
self.width.disable()
self.height.disable()
self.framerate.disable()
self.crop_top.disable()
self.crop_bottom.disable()
self.crop_left.disable()
self.crop_right.disable()
self.state(['!disabled'])
self.enforce_constraints()
def ffmpeg_opts(self):
input_opts = []
output_opts = []
vf = []
if self.start_time.is_edit():
input_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
input_opts += ['-ss', str(new_start)]
if self.end_time.is_edit():
input_opts += ['-to', str(self.end_time.get_final())]
if self.duration.is_edit():
output_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"
vf += ['scale=' + width + ':' + height]
if self.crop_top.is_edit() or self.crop_bottom.is_edit() or \
self.crop_left.is_edit() or self.crop_right.is_edit():
out_w = int(self.width.get_final()) - int(self.crop_left.get_final()) - int(self.crop_right.get_final())
out_h = int(self.height.get_final()) - int(self.crop_top.get_final()) - int(self.crop_bottom.get_final())
vf += [f'crop={out_w}:{out_h}:{self.crop_left.get_final()}:{self.crop_top.get_final()}']
if self.framerate.is_edit():
output_opts += ['-r', str(self.framerate.get_final())]
return FFmpegOptions(input_opts, output_opts, vf)
def frame_count(self):
return float(self.duration.get_final()) * float(self.framerate.get_final())
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