Video Editing: Strip Offset Start/End not consistent with adjusting the strip handles #74890

New Issue

Gabriel · 2020-03-18T17:31:11+01:00

Gabriel commented

2020-03-18 17:31:11 +01:00

System Information
Operating system: Win 10, 64bit
Graphics card: no (CPU)

Blender Version
Broken: (v 2.82a) and also (v 2.83 Alpha, Date 2020-03-18 17:16, Hash c9c08dc7c8)

Short description of error
From the Manual:
https://docs.blender.org/manual/en/latest/video_editing/sequencer/properties/strip.html
Strip Offset Start/End [...] This is the same as adjusting the strip handles.

However currently it is NOT really the same, which adds a lot of confusion to the already complicated concept that includes several offsets:

Detailed description of error

Good: Extend the Strip using Handles: The Strip gets a helpful color code. The "animated" part is colored. The extended "NOT animated / last frame repeated" part is transparent.
Bug: Extend the Strip using Strip Offset: "Animated" and extended parts of the Strip get the same color.
Good: Shorten the Strip using Handles: Strip Offset is correctly calculated.
Bug: Extend the Strip using the Handles (or Extend Keyboard E or Slide Keyboard S): Strip Offset is incorrectly reset to 0.
Good: Handles: The Strip can not be shortened past the last "animated" frame.
Bug: Strip Offset: The Strip can be shortened, until no "animated" frame is left, and even further until the Duration becomes negative.
Bug: Using Slide Keyboard S, the "animated" frames can be moved completely outside the Strip. At least one "animated" frame should remain inside the Strip.

To further improve clarity, I would

rename Hold Offset Start/End to Trim Source Start/End
change Hold Offset Start/End tooltip to "Shortens the Strip by skipping frames at the start/end of the source"
add Strip Offset Start/End tooltip to "Extends the trimmed strip by repeating it's first/last frame or shortens it further"
make End editable (it should do the same, as moving the right strip handle)
add End tooltip "X position where the strip ends"
change Duration tooltip "The length of this strip after applying Trim and Strip Offset"

If you feel very courageous

change Start so that it points to the start of the Strip (currently it points to the first "animated" frame)
I think, Blender heavily depends on Start, while it happily ignores Strip Offset Start and Strip Offset End. So, changing the internal meaning of Start likely makes a huge mess. However, maybe you can introduce and display a new variable "display start" or "strip start" instead, that does the trick, without messing too much with the internals.

Happy Coding!

**System Information** Operating system: Win 10, 64bit Graphics card: no (CPU) **Blender Version** Broken: (v 2.82a) and also (v 2.83 Alpha, Date 2020-03-18 17:16, Hash c9c08dc7c873) **Short description of error** From the Manual: https://docs.blender.org/manual/en/latest/video_editing/sequencer/properties/strip.html Strip Offset Start/End [...] This is the same as adjusting the strip handles. However currently it is NOT really the same, which adds a lot of confusion to the already complicated concept that includes several offsets: ![strip not consistent.png](https://archive.blender.org/developer/F8414168/strip_not_consistent.png) **Detailed description of error** - Good: Extend the Strip using Handles: The Strip gets a helpful color code. The "animated" part is colored. The extended "NOT animated / last frame repeated" part is transparent. - Bug: Extend the Strip using Strip Offset: "Animated" and extended parts of the Strip get the same color. - Good: Shorten the Strip using Handles: Strip Offset is correctly calculated. - Bug: Extend the Strip using the Handles (or Extend *Keyboard E* or Slide *Keyboard S*): Strip Offset is incorrectly reset to 0. - Good: Handles: The Strip can not be shortened past the last "animated" frame. - Bug: Strip Offset: The Strip can be shortened, until no "animated" frame is left, and even further until the Duration becomes negative. - Bug: Using Slide *Keyboard S*, the "animated" frames can be moved completely outside the Strip. At least one "animated" frame should remain inside the Strip. **To further improve clarity, I would** - rename **Hold Offset Start/End** to **Trim Source Start/End** - change **Hold Offset Start/End tooltip** to "Shortens the Strip by skipping frames at the start/end of the source" - add **Strip Offset Start/End tooltip** to "Extends the trimmed strip by repeating it's first/last frame or shortens it further" - make **End** editable (it should do the same, as moving the right strip handle) - add **End tooltip** "X position where the strip ends" - change **Duration tooltip** "The length of this strip after applying Trim and Strip Offset" **If you feel very courageous** - change **Start** so that it points to the start of the Strip (currently it points to the first "animated" frame) I think, Blender heavily depends on **Start**, while it happily ignores Strip Offset Start and Strip Offset End. So, changing the internal meaning of **Start** likely makes a huge mess. However, maybe you can introduce and display a new variable "display start" or "strip start" instead, that does the trick, without messing too much with the internals. Happy Coding!

Gabriel commented

2020-03-18 17:31:11 +01:00

Added subscriber: @gabi2002

Eitan Traurig self-assigned this 2020-03-18 20:05:05 +01:00

Eitan Traurig removed their assignment 2020-03-18 20:05:43 +01:00

Eitan Traurig commented

2020-03-18 20:05:43 +01:00

Added subscriber: @EitanSomething

Richard Antalik commented

2020-03-19 14:28:20 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-03-19 14:28:20 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Richard Antalik commented

2020-03-19 14:28:20 +01:00

This definitely deserves some cleanup. Some issues are already reported, so I won't be adressing everything here.

I will update description before I will work on this.

This definitely deserves some cleanup. Some issues are already reported, so I won't be adressing everything here. I will update description before I will work on this.

Philipp Oeser removed the

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Video Editing: Strip Offset Start/End not consistent with adjusting the strip handles #74890