Video compression is designed for efficient throughput, favoring smaller files to minimize data rate.
video compression always implies a trade-off: it is easier to share and playback smaller files, but it comes at the cost of quality.
Compression is always done by throwing away information, every time you encode video there will be some quality lost in favor ...
You can use frame_offset_start to change length from left side and frame_offset_left to change length from right side. Building on your code
img_strip = bpy.context.scene.sequence_editor.sequences.new_image(
name = img_name,
filepath = img_filepath,
channel = 5,
frame_start = 1500)
img_strip.frame_offset_start = 10
img_strip.frame_offset_end = -20 # Not ...
You have opened the UV editor window
Open image editor window, shortcut Shift + F10
At around top there should be written something View(next to Image Editor button), click it and change it to Mask
You can then create a mask by clicking + New button.
Afaik, there is no sharpening filter in Blender.
In general, if you need to add an effect filter to several strips, add an Adjustment Layer over all strips and add an effect to that.
For modifiers, there is a button in the sidebar/Strip Menu to copy the modifiers from the active strip to all selected strips.
Replace the "replace"-blend mode to "alpha over" or whatever your default is there in items like here:
Also you can resize your image/video in the settings and place them via x,y.
Just tap on your video, then go to effect-strip -> transform like this:
Here you can set x/y and the size...and don't forget to change blend to alpha over ...
I already found it! Well, I'll leave it here if someone else has the same issue:
In SEQUENCER just click on ADD> SCENE> Choose your scene. In the right panel on the "STRIP" tab go to SCENE and change the INPUT to SEQUENCER insted of camera. Done.
A bug was fixed in VSEQF, so now it works in 2.91: https://github.com/snuq/VSEQF
Use the numpad 4, 5 & 6 as J, K, L keys for playback speed:
Alternatively Scrubbing can be enabled in the Timeline Editor menu(but I think that'll only affect audio playing when dragging the playhead)