Image is cropped although crop option is off, Transform uses downscaled input. #35028

New Issue

Anna Celarek · 2013-04-19T19:34:56+02:00

Anna Celarek commented

2013-04-19 19:34:56 +02:00

%%%--- Operating System, Graphics card ---
Win7 64bit, Nvidia GTX 560Ti

- Blender version with error, and version that worked ---

error in svn 56100 and official 2.66a

- Short description of error ---

In the sequencer, when Image Offset is on in an image input, the image is cropped even if Image Crop is off.

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

I attached sequencer.blend and zoomtest.jpg for testing.

The left strip is just standard pasted image, no options changed. The .jpg (1440x1080) is bigger than the render output (360x270).

The middle strip is the same image, with Image Offset on and Image Crop off. There is a Transform stirp above with Uniform Scale = 0.5. The image is cropped to the render frame, so that after the Transform strip (which scales it down), instead of the original scaled image (which was the goal), a cropped version is transformed with a black border around.

The right strip is the standard image, Image Offset off, Crop off. The Transform strip above has Uniform Scale = 2. It uses the downscaled image as input, not the original image, so that there is quality loss.

So all in all, there is no way to scale and move the original image in the original quality, because there is no way to make Transform use an untransformed image as input. In the case of the right strip, where the input is scaled by default, this might be logical (although very inconvenient), but in the case of the middle strip, with Crop option off, it is definitely a bug.
%%%

%%%--- Operating System, Graphics card --- Win7 64bit, Nvidia GTX 560Ti - Blender version with error, and version that worked --- error in svn 56100 and official 2.66a - Short description of error --- In the sequencer, when Image Offset is on in an image input, the image is cropped even if Image Crop is off. - Steps for others to reproduce the error (preferably based on attached .blend file) --- I attached sequencer.blend and zoomtest.jpg for testing. The left strip is just standard pasted image, no options changed. The .jpg (1440x1080) is bigger than the render output (360x270). The middle strip is the same image, with Image Offset on and Image Crop off. There is a Transform stirp above with Uniform Scale = 0.5. The image is cropped to the render frame, so that after the Transform strip (which scales it down), instead of the original scaled image (which was the goal), a cropped version is transformed with a black border around. The right strip is the standard image, Image Offset off, Crop off. The Transform strip above has Uniform Scale = 2. It uses the downscaled image as input, not the original image, so that there is quality loss. So all in all, there is no way to scale and move the original image in the original quality, because there is no way to make Transform use an untransformed image as input. In the case of the right strip, where the input is scaled by default, this might be logical (although very inconvenient), but in the case of the middle strip, with Crop option off, it is definitely a bug. %%%

Anna Celarek commented

2013-04-19 19:34:56 +02:00

Changed status to: 'Open'

Ton Roosendaal commented

2013-04-20 13:36:31 +02:00

%%%Hey Peter, you feel like an interesting weekend todo? :)%%%

Peter Schlaile commented

2013-05-20 15:19:56 +02:00

%%%it's more like a pipeline rewrite, to be honest, since all of sequencer currently assumes, that after input strip preprocessing every image has the same size...

That doesn't alter the fact, that this should be done, but it's not exactly a weekend project (all effects have to be rewritten...)

Sorry for responding so late...

Regards
Peter%%%

%%%it's more like a pipeline rewrite, to be honest, since all of sequencer currently assumes, that after input strip preprocessing every image has the same size... That doesn't alter the fact, that this should be done, but it's not exactly a weekend project (all effects have to be rewritten...) Sorry for responding so late... Regards Peter%%%

Bastien Montagne commented

2013-10-01 08:42:52 +02:00

%%%Closing as TODO (see http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Editors#Video_Sequencer), esp. as we have a potential new VSE engine in this year’s GSOC, should be addressed here I guess.%%%

Bastien Montagne commented

2013-10-01 08:42:52 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2013-10-01 08:42:52 +02:00

Razvan Cosmin Radulescu commented

2017-03-09 01:25:51 +01:00

Added subscriber: @razvanc87

Razvan Cosmin Radulescu commented

2017-03-09 01:25:51 +01:00

This is on the TODO since forever now. I think it still hasn't been fixed in 2.78c?! Does anyone know a workaround please?

Peter Schlaile commented

2017-03-09 09:31:43 +01:00

Workaround is available, yes:

D2506

Workaround is available, yes: [D2506](https://archive.blender.org/developer/D2506)

Razvan Cosmin Radulescu commented

2017-03-09 10:38:53 +01:00

This isn't a workaround, workarounds don't require patching & recompiling... thanks anyway

Anna Celarek commented

2017-03-09 10:41:56 +01:00

Any news on the potential new VSE engine Bastien mentionned? Did I miss it, has the topic been dropped, or is it beeing worked on for one of the next Blender releases?

Anna Celarek commented

2017-03-09 10:47:21 +01:00

PS. I'm currently working around that by doing all transforms in the node editor. Input, Transform node, Composite node --> it outputs to a Scene strip in the VSE.
That works, although in many cases it would be much more convenient in VSE (especially if there's a lot of strips to scale, it gets complicated with nodes).

PS. I'm currently working around that by doing all transforms in the node editor. Input, Transform node, Composite node --> it outputs to a Scene strip in the VSE. That works, although in many cases it would be much more convenient in VSE (especially if there's a lot of strips to scale, it gets complicated with nodes).

Razvan Cosmin Radulescu commented

2017-03-09 15:14:23 +01:00

Thanks Anna, I tried the same (using the Compositor) but working with Scenes strips in VSE proved to be extremely slow so in the end I resized the vids, kind of annoying the Transform strip uses cropped input :)

Sybren A. Stüvel referenced this issue

2023-03-30 15:30:09 +02:00

Blender development todo list -- Editors #55366

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Image is cropped although crop option is off, Transform uses downscaled input. #35028