Follow Track -> Constraint to F-Curve has no effect #76440

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Konstantins Visnevskis · 2020-05-05T11:59:57+02:00

Konstantins Visnevskis commented

2020-05-05 11:59:57 +02:00

System Information
Operating system: Win7x64,
Blender Version
2.83, 2.9

Short description of error
Pressing Constraint to F-Curve in Follow Track constraint seems to have no effect.

Exact steps for others to reproduce the error
track2.blend

Open file
Press Constraint to F-Curve
Nothing seems to happen

**System Information** Operating system: Win7x64, **Blender Version** 2.83, 2.9 **Short description of error** Pressing Constraint to F-Curve in Follow Track constraint seems to have no effect. **Exact steps for others to reproduce the error** [track2.blend](https://archive.blender.org/developer/F8513673/track2.blend) - Open file - Press Constraint to F-Curve - Nothing seems to happen

Konstantins Visnevskis commented

2020-05-05 11:59:57 +02:00

Added subscriber: @KonstantinsVisnevskis

blender-admin commented

2020-05-05 11:59:57 +02:00

#53060 was marked as duplicate of this issue

Philipp Oeser commented

2020-05-05 13:00:17 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-05-05 13:00:17 +02:00

Seems to work for clip 00004.MTS
Seems to fail for 00024_deinter-cut_0001.jpg.001 and 00024_deinter-cut_0001.jpg.001.

Bit confused here, both failing clips dont seem to have tracks/markers?
(though for 00024_deinter-cut_0001.jpg.001 I can see some in the Movie Clip Editor, however clip.tracking.reconstruction.is_valid seems to be False?)

To why this is failing: code in CLIP_OT_constraint_to_fcurve cannot find start and end frame here, thus does nothing...

Seems to work for clip `00004.MTS` Seems to fail for `00024_deinter-cut_0001.jpg.001` and `00024_deinter-cut_0001.jpg.001`. Bit confused here, both failing clips dont seem to have tracks/markers? (though for `00024_deinter-cut_0001.jpg.001` I can see some in the Movie Clip Editor, however `clip.tracking.reconstruction.is_valid` seems to be False?) To why this is failing: code in `CLIP_OT_constraint_to_fcurve` cannot find start and end frame here, thus does nothing...

Konstantins Visnevskis commented

2020-05-05 13:05:18 +02:00

The clip in question doesn't have camera/object "solved". All that is needed from it are just track point animations.
It would be logical to assume from a user perspective that start/end for baking is limited by the scene start/end. Limiting it by a valid reconstruction is probably smarter, but a fallback would be nice. Or an error saying something like "no valid reconstruction (use Bake Action)".

The clip in question doesn't have camera/object "solved". All that is needed from it are just track point animations. It would be logical to assume from a user perspective that start/end for baking is limited by the scene start/end. Limiting it by a valid reconstruction is probably smarter, but a fallback would be nice. Or an error saying something like "no valid reconstruction (use Bake Action)".

Germano Cavalcante commented

2020-05-05 22:31:55 +02:00

Added subscriber: @mano-wii