how to get last video on iphone?

[cvp]

@frankL said:

How can I update the slider to indicate the elapsed time status of the video

from objc_util import *
import ui
AVPlayerItem=ObjCClass('AVPlayerItem')
AVPlayer=ObjCClass('AVPlayer')
AVPlayerLayer=ObjCClass('AVPlayerLayer')

url = nsurl('assets-library://asset/asset.MOV?id=71F89028-7FA0-4C53-B6AD-6659BC8458D8&ext=MOV')
u=ObjCClass('AVURLAsset').alloc().initWithURL_options_(url,None)
i=AVPlayerItem.playerItemWithAsset_(u)
p=AVPlayer.playerWithPlayerItem_(i)
videolayer=AVPlayerLayer.playerLayerWithPlayer_(p)

#define cmtime, for seeking
import ctypes
CMTimeValue=ctypes.c_int64
CMTimeScale=ctypes.c_int32
CMTimeFlags=ctypes.c_uint32
CMTimeEpoch=ctypes.c_int64
class CMTime(Structure):
   _fields_=[('value',CMTimeValue),
   ('timescale',CMTimeScale),
   ('flags',CMTimeFlags),
   ('epoch',CMTimeEpoch)]
   def __init__(self,value=0,timescale=1,flags=0,epoch=0):
      self.value=value
      self.timescale=timescale
      self.flags=flags
      self.epoch=epoch
c.CMTimeMakeWithSeconds.argtypes=[ctypes.c_double,ctypes.c_int32]
c.CMTimeMakeWithSeconds.restype=CMTime
c.CMTimeGetSeconds.argtypes=[CMTime]
c.CMTimeGetSeconds.restype=c_double


class MyView(ui.View):
	def __init__(self, *args, **kwargs):
		ui.View.__init__(self, *args, **kwargs)
		self.background_color = 'white'
		
		V=ObjCInstance(self)
		videolayer.frame=V.bounds()
		V.layer().addSublayer_(videolayer)

		bplay = ui.ButtonItem()
		bplay.title = 'play'
		def b_play_action(sender):
		    p.play()
		bplay.action = b_play_action
		self.update_interval = 0		
		
		bpause = ui.ButtonItem()
		bpause.title = 'pause'
		def b_pause_action(sender):
		    p.pause()
		bpause.action = b_pause_action		
		self.right_button_items = (bplay, bpause)
		
		slider=ui.Slider(frame=(0,0,self.width,20))		
		#sender.superview.name = str(sender.value*duration_sec)
		slider.action=self.slider_action
		slider.bring_to_front()
		self.slider = slider
		self.add_subview(slider)
		
	def update(self):
		s = p.currentTime().a/p.currentTime().b
		self.slider.value = s/duration_sec

	def slider_action(self, sender):
		self.seek(sender.value*duration_sec)
		
	@on_main_thread
	def seek(self,t):
		T=c.CMTimeMakeWithSeconds(t,1)
		p.seekToTime_(T,argtypes=[CMTime],restype=None)

v=MyView(frame=(0,0,500,500))
v.present('sheet')

duration=i.duration()
duration_sec=duration.a/duration.b
#print(duration_sec)

p.play()
v.update_interval = 0.1	

[cvp]

@frankL try until

v.update_interval = 1/60	

[cvp]

@frankL Is it what you wanted?

[frankL]

I see that your code works but I'm trying to implement it in a subview and I can't figure out how to use the v.update_interval method.

[frankL]

To clarify, I have a button in the main view that plays a video that the user selects from the main view. The button action instantiates a subview that runs the video and presents the slider, play, pause and stop buttons. The slider works to move the video playback manually but otherwise the slider doesn't display the elapsed time of the video. Any insight you can give me would be appreciated.

[cvp]

@frankL said:

how to use the v.update_interval method.

update_interval is not a method but an attribute setting thé interval in seconds between 2 calls to the update méthod in a subclassed view.

[cvp]

@frankL said:

Any insight you can give me would be appreciated

It would be easier to help if you post your script.

[frankL]

Here is the code. The function with the view for the video player is "play_action".

import ui
import csv
import os
import objc_util
from objc_util import *

#
def show_list_dialog(items=None, *args, **kwargs):
	items = items or []
	tbl = ui.TableView(**kwargs)
	tbl.data_source = ui.ListDataSource(items)
	my_sel = {'value': None}
	class MyTableViewDelegate (object):
		def tableview_did_select(self, tableview, section, row):
			my_sel['value'] = tableview.data_source.items[row]
			tableview.close()
	tbl.delegate = MyTableViewDelegate()
	tbl.present(style='sheet')
	tbl.wait_modal()
	return my_sel['value']
#
#
def open_video_ref():
	matrix=[]
	my_path=os.path. abspath("dance_video_ref.csv")
	with open(my_path,'r',encoding='utf-8') as reader:
		reader=csv.DictReader(reader)
		for row in reader:
			matrix.append([row['Index'], row['Dance'], row['Instructor'], row['Description'], row['Label'], row['url'], row['level'], row['duration']])
	return matrix
#
#		       MAIN PROGRAM             #
#

#
w, h = ui.get_screen_size()
h -= 64
bh = bw = 80  # label height and button width
mg = 10  # margin
view = ui.View(name='Dance Lesson Videos', bg_color='#D98880', frame=(0, 0, w, h))

dance_instructor_value='Select Instructor(s)'
dance_instructor = ui.TextField(frame=(100,15,130,0),border_color='black', border_width=2, text=dance_instructor_value, bordered=True, font=('Arial Rounded MT Bold',15))
dance_instructor.height=30
dance_instructor.width=130
dance_instructor.enabled=False
view.add_subview(dance_instructor)

#
def instructor_action(sender):
	global dance_matrix
	matrix = open_video_ref()
	priority = int(dance_priority.text)
	dance_matrix = []
	for row in matrix:
		if priority == int(row[6]):
			dance_matrix.append(row)
	instructor_list = ['All']
	for row in dance_matrix:
		instructor = row[2]
		if instructor in instructor_list:
			continue
		else:
			instructor_list.append(instructor)
	f = (0, 0, 400, 300)
	try:
		result = show_list_dialog (instructor_list, frame=f, name='Select an Instructor')
		dance_instructor.text=result
		if dance_instructor.text != 'All':
			new_matrix = []
			for row in dance_matrix:
				if row[2] == dance_instructor.text:
					new_matrix.append(row)
			dance_matrix = new_matrix
		dance_button.enabled=True
		search_dance.text = 'dance name'
	except:
		dance_instructor.text = 'try again'
	pattern_button.enabled=False
	pattern_video.text = 'dance pattern'
	play_button.enabled=False
	return
#
instructor_button = ui.Button(frame=(10,10,130,0),border_color='black', border_width=2, corner_radius = 10, tint_color = 'black', background_color='#EAECEE', action=instructor_action, font=('Arial Rounded MT Bold',18))
instructor_button.title='Instrctr'
instructor_button.width=80
instructor_button.height=40
view.add_subview(instructor_button)

#
def priority_action(sender):
	matrix = open_video_ref()
	priority_list = []
	for row in matrix:
		priority = row[6]
		if priority in priority_list:
			continue
		else:
			priority_list.append(priority)
	f = (0, 0, 400, 300)
	priority_list.sort()
	result = show_list_dialog(priority_list, frame=f, name='Select Priority')
	dance_priority.text=str(result)
	dance_button.enabled=False
	dance_instructor.text = 'Select Instructor(s)'
	search_dance.text = 'dance name'
	pattern_button.enabled=False
	pattern_video.text = 'dance pattern'
	play_button.enabled=False
	return
#
priority_button = ui.Button(frame=(240,10,130,0),border_color='black', border_width=2, corner_radius = 10, tint_color = 'black', background_color='#EAECEE', action=priority_action, font=('Arial Rounded MT Bold',18))
priority_button.title='Priority'
priority_button.width=80
priority_button.height=40
view.add_subview(priority_button)

dance_priority_value='0'
dance_priority = ui.TextField(frame=(330,15,130,0),border_color='black', border_width=2, text=dance_priority_value, bordered=True, font=('Arial Rounded MT Bold',15))
dance_priority.height=30
dance_priority.width=30
dance_priority.enabled=False
dance_priority.alignment=ui.ALIGN_CENTER
view.add_subview(dance_priority)

dance_value='dance name'
search_dance = ui.TextField(frame=(100,65,130,0),border_color='black', border_width=2, text=dance_value, bordered=True, font=('Arial Rounded MT Bold',15))
search_dance.height=30
search_dance.width=130
search_dance.enabled=False
view.add_subview(search_dance)

#
def dance_action(sender):
	global dance_matrix
	dance_list = []
	for row in dance_matrix:
		dance = row [1]
		if dance in dance_list:
			continue
		else:
			dance_list.append(dance)
	f = (0, 0, 400, 300)
	try:
		result = show_list_dialog(dance_list, frame=f, name='Select a Dance')
		search_dance.text=result
		new_matrix = []
		for row in dance_matrix:
			if row[1] == search_dance.text:
				new_matrix.append(row)
		dance_matrix = new_matrix
		pattern_button.enabled=True
	except:
		search_dance.text = 'try again'
	return
#
dance_button = ui.Button(frame=(10,60,130,30),border_color='black', border_width=2, corner_radius = 10, tint_color = 'black', background_color='#EAECEE', action=dance_action, font=('Arial Rounded MT Bold',18))
dance_button.title='Dance'
dance_button.width=80
dance_button.height=40
dance_button.enabled=False
view.add_subview(dance_button)

#
pattern_value='dance pattern'
pattern_video = ui.TextView(frame=(100,105,80,0),border_color='black', border_width=2, text=pattern_value, bordered=True, font=('Arial Rounded MT Bold',15))
pattern_video.height=65
pattern_video.width=260
pattern_video.enabled=False
view.add_subview(pattern_video)
#
def pattern_action(sender):
	global found_row
	global dance_matrix
	pattern_list = []
	for row in dance_matrix:
		if row[4] in pattern_list:
			continue
		else:
			pattern_list.append(row[4])
	f = (0, 0, 400, 300)
	result = show_list_dialog(pattern_list, frame=f, name='Select a Pattern')

	found=False
	for row in dance_matrix:
		if row[4] == result:
			found_row = row
			found=True
			break
	if found:
		pattern_video.text=found_row[3]
		dance_instructor.text = found_row[2]
		play_button.enabled=True
	else:
		pattern_video.text='none found'
	dance_button.enabled=False
	return
#
pattern_button = ui.Button(frame=(10,120,130,30),border_color='black', border_width=2, corner_radius = 10, tint_color = 'black', background_color='#EAECEE', action=pattern_action, font=('Arial Rounded MT Bold',18))
pattern_button.title='Pattern'
pattern_button.width=80
pattern_button.height=40
pattern_button.enabled=False
view.add_subview(pattern_button)

#
def play_action(sender):
	n = nsurl(found_row[5])
	u=ObjCClass('AVURLAsset'). alloc().initWithURL_options_(n,None)
	i=AVPlayerItem.playerItemWithAsset_(u)
	p=AVPlayer.playerWithPlayerItem_(i)
	videolayer=AVPlayerLayer. playerLayerWithPlayer_(p)

	v=ui.View(frame=(0,0,500,500))
	V=ObjCInstance(v)
	videolayer.frame=V.bounds()
	V.layer().addSublayer_(videolayer)
	v.present('sheet')
	#
	def play_video_action(sender):
		p.play()
		return
	#
	def pause_video_action(sender):
		p.pause()
		return
	#
	def stop_action(sender):
		p.pause()
		seek(0)
		slider.value = 0
		return
	#
	def add_spaces(sender):
		print('space')
		return
	#
	duration_sec = float(found_row[7])
	slider=ui.Slider(frame=(0,0,v.width,110), background_color = 'lightblue')

	@on_main_thread
	def seek(t):
		T=c.CMTimeMakeWithSeconds(t,1)
		p.seekToTime_(T,argtypes=[CMTime], restype=None)
	#
	def slider_action(sender):
		seek(sender.value*duration_sec)
	slider.action=slider_action
	v.add_subview(slider)
	#
	v.left_button_items = (((ui.ButtonItem(title='  ', action= add_spaces))),(ui.ButtonItem(title='\u23F8',action=pause_video_action)), ((ui.ButtonItem(title='  ', action= add_spaces))),((ui.ButtonItem(title='\u25B6', action= play_video_action))), ((ui.ButtonItem(title='  ', action= add_spaces))),((ui.ButtonItem(title='\u23F9', action= stop_action))))
	#
	p.play()

	return

#
play_button = ui.Button(frame=(10,170,130,30),border_color='black', border_width=2, corner_radius = 10, tint_color = 'black', background_color='#EAECEE', action=play_action, font=('Arial Rounded MT Bold',18))
play_button.title='\u25B6'
play_button.width=80
play_button.height=40
play_button.enabled=False
view.add_subview(play_button)



AVPlayerItem=ObjCClass('AVPlayerItem')
AVPlayer=ObjCClass('AVPlayer')
AVPlayerLayer=ObjCClass('AVPlayerLayer')
import photos

def pick_asset():
       assets = photos.get_assets(media_type='video')
       asset = photos.pick_asset(assets)
       phasset=ObjCInstance(asset)
       asseturl=ObjCClass('AVURLAsset').alloc().initWithURL_options_(phasset.ALAssetURL(),None)
       return asseturl
#define cmtime, for seeking
import ctypes
CMTimeValue=ctypes.c_int64
CMTimeScale=ctypes.c_int32
CMTimeFlags=ctypes.c_uint32
CMTimeEpoch=ctypes.c_int64
class CMTime(Structure):
   _fields_=[('value',CMTimeValue),
   ('timescale',CMTimeScale),
   ('flags',CMTimeFlags),
   ('epoch',CMTimeEpoch)]
   def __init__(self,value=0,timescale=1,flags=0,epoch=0):
      self.value=value
      self.timescale=timescale
      self.flags=flags
      self.epoch=epoch
c.CMTimeMakeWithSeconds.argtypes=[ctypes.c_double,ctypes.c_int32]
c.CMTimeMakeWithSeconds.restype=CMTime
c.CMTimeGetSeconds.argtypes=[CMTime]
c.CMTimeGetSeconds.restype=c_double

############



#########################################
nav_view = ui.NavigationView(view)
nav_view.present('sheet')
#########################################

[JonB]

I could be wrong, but it may be that the update method is only called at the top level view, the one that you called present on. So you would need to set the update interval on the top level view,and then implement an update in that view to call update in cvp's custom view.

[JonB]

ProbBly the "right_ way to do this is to implement an objcblock that can be passed to the AVPlayer's
addPeriodicTimeObserver_forInterval_queue_using_.

[frankL]

JonB, you're over my head on that. If you look at my code, how would I call an update at the top level before the subview is instantiated? And my understanding of objc is very small. I wouldn't know how to implement an objclock to pass to AVPlayer. Suggestions? Thanks.

[JonB]

Alternatively, edit your post and add the ``` before and after the code.

[cvp]

@JonB said:

the update method is only called at the top level view

I don't think so, I have ui.Views that I simulate as buttons to play a gif in their image, and def update works perfectly.

[JonB]

This post is deleted!

[cvp]

@frankL the problem is that to can use update method, you have to use a subclass of ui.View, thus, replace all your play_action function by

class MyView(ui.View):
	def __init__(self, *args, **kwargs):
		global found_row
		ui.View.__init__(self, *args, **kwargs)
		n = nsurl(found_row[5])
		u=ObjCClass('AVURLAsset'). alloc().initWithURL_options_(n,None)
		i=AVPlayerItem.playerItemWithAsset_(u)
		p=AVPlayer.playerWithPlayerItem_(i)
		videolayer=AVPlayerLayer. playerLayerWithPlayer_(p)
		self.p = p
		self.i = i
		
		self.background_color = 'white'
		
		V=ObjCInstance(self)
		videolayer.frame=V.bounds()
		V.layer().addSublayer_(videolayer)

		self.update_interval = 0		
		
		self.left_button_items = (((ui.ButtonItem(title='  ', action= self.add_spaces))),(ui.ButtonItem(title='\u23F8',action=self.pause_video_action)), ((ui.ButtonItem(title='  ', action= self.add_spaces))),((ui.ButtonItem(title='\u25B6', action= self.play_video_action))), ((ui.ButtonItem(title='  ', action= self.add_spaces))),((ui.ButtonItem(title='\u23F9', action= self.stop_action))))
				
		self.slider=ui.Slider(frame=(0,0,self.width,110), background_color = 'lightblue')
		self.slider.action=self.slider_action
		self.slider.bring_to_front()
		self.add_subview(self.slider)
		
	def update(self):
		duration=self.i.duration()
		if duration.b == 0:
			return
		self.duration_sec=duration.a/duration.b
		s = self.p.currentTime().a/self.p.currentTime().b
		self.slider.value = s/self.duration_sec
		
	def play_video_action(self,sender):
		self.p.play()
		return
	#
	def pause_video_action(self,sender):
		self.p.pause()
		return
	#
	def stop_action(self,sender):
		self.p.pause()
		self.seek(0)
		self.slider.value = 0
		return
	#
	def add_spaces(self,sender):
		print('space')
		return

	def slider_action(self, sender):
		self.seek(sender.value*self.duration_sec)
		
	@on_main_thread
	def seek(self,t):
		T=c.CMTimeMakeWithSeconds(t,1)
		self.p.seekToTime_(T,argtypes=[CMTime],restype=None)
		
def play_action(sender):
	global p

	v=MyView(frame=(0,0,500,500))
	v.present('sheet')

	v.p.play()
	v.update_interval = 1/60	

[frankL]

cvp,
I replaced the play_action function with your code and I get an error "name '@on_main_thread' is not defined". I'm relatively new to python and haven't tried to create and use "class" so there must be something else I need to add somewhere. What should I do? Thanks

[cvp]

@frankL sure that this line is still in the imports...

from objc_util import *

[cvp]

@frankL I'll be away for 2 hours, sorry. Anyway, if problem still occurs, you can post your code again, included in two lines with ``` (you can use the </> button to generate them).

[cvp]

@frankL or if you prefer, I post your full script modified with my little part.

[frankL]

Apparently I had the 'from objc_util import *' after the class MyView(ui.View):
Once I move it up everything works perfectly. I can't thank you enough.
I retired a few years ago and just started learning Python last summer and Pythonista late last fall so I've got a lot to learn and I really appreciate all of your help and the help from everyone on the omz:forum.