Changing text strip "start" time by typing leads to flickering text at former time #75415

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Andi McClure · 2020-04-05T18:37:27+02:00

Andi McClure commented

2020-04-05 18:37:27 +02:00

System Information
Operating system: Mac OS X 10.13.6 (17G10021)
Graphics card: Intel Iris Graphics 6100
Blender Version
Broken: First encountered in 2.82, also tested in "Version 2.82a (2.82a 2020-03-12)", also tested in a nightly, the download page called it "Blender 2.83 Alpha, April 04, 23:21:36 - 505a19ed75, macOS 64 bit, 193.81MB". Bug reproduced the same in all 3.

Duration + 4 * 60

Short description of error

When I change the start position of a text strip in my video by manually entering a time, then replay the video up to the previous start time of the text strip, I see the text strip present but flickering at its old time (where it isn't supposed to be anymore).

Exact steps for others to reproduce the error

Here is a .blend file that recreates the one where I originally saw the error but I replaced the video with a still frame and packed it into the .blend.

defaults2-bugreport.blend

Open this file. Allow it to play for 9 or 10 seconds until you see the words "An interesting thing about it is". Pause the video. Select the "An interesting thing about it is" text strip. Go into the "Strip" tab on the right. Click on the "start time" to edit it. At the end of the current time, type "+4*60" and hit return. Hit the Jump to Start button. Press play. You will clearly see the text "An interesting thing about it is" flickering, right when it was originally present, even though you can see in the timeline view that the text strip is not there.

AN OBSERVATION: I do NOT see the bug if I change the start time of the text strip by dragging it. I only see the bug if I alter the start time by typing. If I alter the start time by typing it reproduces 100%.

You can ignore everything in this .blend file after the first 20 seconds.

Here is a video of me reproducing the bug in 2.83 Alpha 505a19ed75. I also have a video of reproducing the bug in 2.82a.

blenderbugflicker2.mov

**System Information** Operating system: Mac OS X 10.13.6 (17G10021) Graphics card: Intel Iris Graphics 6100 **Blender Version** Broken: First encountered in 2.82, also tested in "Version 2.82a (2.82a 2020-03-12)", also tested in a nightly, the download page called it "Blender 2.83 Alpha, April 04, 23:21:36 - 505a19ed75b2, macOS 64 bit, 193.81MB". Bug reproduced the same in all 3. Duration + 4 * 60 **Short description of error** When I change the start position of a text strip in my video by manually entering a time, then replay the video up to the previous start time of the text strip, I see the text strip present but flickering at its old time (where it isn't supposed to be anymore). **Exact steps for others to reproduce the error** Here is a .blend file that recreates the one where I originally saw the error but I replaced the video with a still frame and packed it into the .blend. [defaults2-bugreport.blend](https://archive.blender.org/developer/F8450717/defaults2-bugreport.blend) Open this file. Allow it to play for 9 or 10 seconds until you see the words "An interesting thing about it is". Pause the video. Select the "An interesting thing about it is" text strip. Go into the "Strip" tab on the right. Click on the "start time" to edit it. At the end of the current time, type "+4*60" and hit return. Hit the Jump to Start button. Press play. You will clearly see the text "An interesting thing about it is" flickering, right when it was originally present, even though you can see in the timeline view that the text strip is not there. AN OBSERVATION: I do *NOT* see the bug if I change the start time of the text strip by dragging it. I only see the bug if I alter the start time by typing. If I alter the start time by typing it reproduces 100%. You can ignore everything in this .blend file after the first 20 seconds. Here is a video of me reproducing the bug in 2.83 Alpha 505a19ed75b2. I also have a video of reproducing the bug in 2.82a. [blenderbugflicker2.mov](https://archive.blender.org/developer/F8450731/blenderbugflicker2.mov)

Andi McClure commented

2020-04-05 18:37:27 +02:00

Added subscriber: @mcc111