How to write ALPHA videoclip from alpha pngs.

[mic-user]

Hi.

To write alpha enabled video clip like the original source file that alpha pngs,
Does below code should works?
Am I missing something? What is the meaning of '#679'?

(on Windows - Python 3.11.7 - 32BIT,
moviepy 1.0.3 latest)

	_video_clip_path : str = 'output.avi'
	img = ['1.png', '2.png', '3.png', '4.png', '5.png', '6.png',
		'7.png', '8.png', '9.png', '10.png', '11.png', '12.png']

	_duration_in_seconds : float = 2.0
	clips : list = []
	for m in img:
		_image_clip : editor.ImageClip = editor.ImageClip(m, transparent=True)
		_image_clip = _image_clip.set_duration(_duration_in_seconds)
		clips.append(_image_clip)

	concat_clip : editor.VideoClip = editor.concatenate_videoclips(clips, mask=True, method="compose")
	concat_clip.write_videofile(_video_clip_path, 
								fps=24,
								codec='png',
								threads = 6,
								)

[SohamTilekar]

You Can use the ImageSequenceClip.

[mic-user]

@SohamTilekar Can I ask you something simple?
I have a new very simple code below.

1. Is it expected transparent video clip produced?
2. Am I right to produce transparent videoclip with one single alpha enabled png file?
3. After producing a file, how to veryfy it has transparent pixel in it? which ...meta info should I check?

`
_image_clip_list : list = []

for i in range(_fps * _seconds):

	_image_clip_list.append(_single_png_path)

_videoClip : editor.ImageClip = editor.ImageSequenceClip(_image_clip_list, 
									fps=_fps, 
									durations=_seconds, 
									with_mask=True)

_videoClip.write_videofile(_output_file_name, threads = 3)

`

[SohamTilekar]

First things first the moviepy have a problem which can't export the transparent video.
This problem is due to the write_videoclip. You can save a transparent transparent frame in a folder and using ffmpeg directly to output a transparent video.

Note all format of video do not suport transparency.

[mic-user]

Crystal clear but it's a shame...
Will check the ffmpeg way. Thanks a lot.

[SohamTilekar]

You close the discussion, but you did not mark as answer. the discussion will not end.