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Images & MoviesProject
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Description

Import and export of images and movies.

Developer Members: @Sergey Sharybin (sergey) @Brecht Van Lommel (brecht)

Recent Activity

Yesterday

mirh (mirh) added a comment to T60947: FFMpeg color offset.

Well, putting aside it just doesn't feel right to begin with to let such important information unspecified, as I was saying it's all a precarious matter of resolutions.
Just try to render some teeny-weeny video, and you'll see it's the bt.709 color matrix now to be screwing it.

Sun, Jan 16, 6:34 PM · VFX & Video, Images & Movies, BF Blender
Konstantins Visnevskis (kivig) added a comment to T60947: FFMpeg color offset.

What are the downsides of the flags I posted? They do seem to work in standalone. Are those h264 exclusive also? On the other hand it seems h264 is de-facto standard for light on hardware/size video.

Sun, Jan 16, 4:27 PM · VFX & Video, Images & Movies, BF Blender
mirh (mirh) added a comment to T60947: FFMpeg color offset.

After effects, just like "top notch" video players, has this heuristics that choose the color space based on the HD resolution and thinks it's rec.709 even though ffmpeg targets 601 for everything by default.
Other rendering software may actually properly flag the video stream, or even if they don't they may dynamically convert the color space based on the output dimensions (especially if they target professional scenarios that may closely tie with TV work)
This is also what out_color_matrix does, "matching the conventions" expected for unflagged videos.
But since the video is still untagged (and ffmpeg also doesn't have this questionable inputs guess game from the last century) when imported it will be assumed to be rec.601, in turn shifting colors again.
(standalone ffmpeg of course produces the same results of blender that uses it)

Sun, Jan 16, 3:35 PM · VFX & Video, Images & Movies, BF Blender
Konstantins Visnevskis (kivig) added a comment to T60947: FFMpeg color offset.

@mirh (mirh)

p.s. take note browsers are quite the can of worms, and you better use some legit video player to discuss this issue

Browsers are cans of worms by their nature. Mentioned those just for context.

Sun, Jan 16, 12:43 AM · VFX & Video, Images & Movies, BF Blender

Sat, Jan 15

mirh (mirh) added a comment to T60947: FFMpeg color offset.

Ok, so this:
-vf scale=out_color_matrix=bt709
does the conversion for other programs to read colors identical to png.

Sat, Jan 15, 3:47 PM · VFX & Video, Images & Movies, BF Blender

Fri, Jan 14

lucas (jackzillaz) updated the task description for T94891: cant import image sequence ant cant import multiple images on shading menu.
Fri, Jan 14, 2:59 AM · Images & Movies, Import/Export, Motion Tracking, BF Blender

Wed, Jan 12

Jesse Yurkovich (deadpin) closed T94572: Out-of-bounds memory access due to malformed HDR image file as Resolved.
Wed, Jan 12, 5:59 AM · Images & Movies, BF Blender
Jesse Yurkovich (deadpin) closed T89542: Blender Crashes to Desktop when viewing thumbnail of a certain HDRI as Resolved by committing rB77616082f44d: Fix T89542: Crash when loading certain .hdr files.
Wed, Jan 12, 5:58 AM · Images & Movies, BF Blender
Jesse Yurkovich (deadpin) closed D11952: Fix T89542: Crash when loading certain .hdr files.
Wed, Jan 12, 5:58 AM · Images & Movies

Mon, Jan 10

Brecht Van Lommel (brecht) added a member for Images & Movies: Brecht Van Lommel (brecht).
Mon, Jan 10, 7:18 PM
Brecht Van Lommel (brecht) removed a member for Images & Movies: Ton Roosendaal (ton).
Mon, Jan 10, 7:18 PM
Brecht Van Lommel (brecht) set the color for Images & Movies to Blue.
Mon, Jan 10, 6:44 PM
Brecht Van Lommel (brecht) edited Description on Images & Movies.
Mon, Jan 10, 6:44 PM
Sergey Sharybin (sergey) closed T94661: Out-of-bounds memory access due to malformed DDS image file as Resolved by committing rBd9dd8c287f57: Fix T94661: Out-of-bounds memory access due to malformed DDS image file.
Mon, Jan 10, 2:29 PM · Images & Movies, BF Blender
Sergey Sharybin (sergey) accepted D11952: Fix T89542: Crash when loading certain .hdr files.
Mon, Jan 10, 11:40 AM · Images & Movies
Evan Wilson (EAW) moved T69982: Cycles: sRGB texture compression happens after interpolation from Backlog to Known Issue on the Images & Movies board.
Mon, Jan 10, 4:01 AM · Images & Movies, Render & Cycles, Cycles, BF Blender
Evan Wilson (EAW) added a project to T69982: Cycles: sRGB texture compression happens after interpolation : Images & Movies.
Mon, Jan 10, 4:00 AM · Images & Movies, Render & Cycles, Cycles, BF Blender

Sat, Jan 8

Evan Wilson (EAW) added a project to T86764: Texture properties not working with OSL enabled and unpacked textures: Images & Movies.
Sat, Jan 8, 6:15 AM · Images & Movies, Render & Cycles, BF Blender
Evan Wilson (EAW) moved T76187: Cycles Image Texture Alpha conversion inconsistency with EEVEE and Image Editor from Backlog to Known Issue on the Images & Movies board.
Sat, Jan 8, 5:21 AM · Images & Movies, Render & Cycles, BF Blender
Evan Wilson (EAW) added a project to T76187: Cycles Image Texture Alpha conversion inconsistency with EEVEE and Image Editor: Images & Movies.
Sat, Jan 8, 5:21 AM · Images & Movies, Render & Cycles, BF Blender

Fri, Jan 7

Sergey Sharybin (sergey) closed T86952: Heap Buffer Overflow when viewing dds thumbnails in the file browser. as Resolved by committing rBbef2412ca253: Fix T86952: Buffer overflow reading specific DDS images.
Fri, Jan 7, 11:29 AM · Render & Cycles, Images & Movies, BF Blender
Jesse Yurkovich (deadpin) closed T94629: Out-of-bounds memory access in IMB_flipy() due to large image dimensions as Resolved by committing rB82858ca3f4e6: Fix T94629: The IMB_flip API would fail with large images.
Fri, Jan 7, 7:24 AM · Images & Movies, BF Blender
Aaron Carlisle (Blendify) changed the subtype of T94661: Out-of-bounds memory access due to malformed DDS image file from "Report" to "Bug".
Fri, Jan 7, 3:11 AM · Images & Movies, BF Blender

Thu, Jan 6

Jesse Yurkovich (deadpin) added a revision to T94629: Out-of-bounds memory access in IMB_flipy() due to large image dimensions: D13744: Fix T94629: The IMB_flip API would fail with large images.
Thu, Jan 6, 7:00 AM · Images & Movies, BF Blender

Wed, Jan 5

Evan Wilson (EAW) added a comment to T94661: Out-of-bounds memory access due to malformed DDS image file.

T86952: Heap Buffer Overflow when viewing dds thumbnails in the file browser. I would think is also related, as it involves a Heap Buffer overflow in the dds flipping function.
https://developer.blender.org/diffusion/B/browse/master/source/blender/imbuf/intern/dds/FlipDXT.cpp

Wed, Jan 5, 6:08 PM · Images & Movies, BF Blender
Philipp Oeser (lichtwerk) changed the status of T94661: Out-of-bounds memory access due to malformed DDS image file from Needs Triage to Confirmed.

Can confirm.

Wed, Jan 5, 2:48 PM · Images & Movies, BF Blender
Evan Wilson (EAW) added a comment to T82790: Fully transparent generated images draw colors in image editor.

I had trouble finding this so I added it to the Images & Movies project, and created a Known Issue column there.

Wed, Jan 5, 7:43 AM · Images & Movies, BF Blender, EEVEE & Viewport
Evan Wilson (EAW) moved T92977: Exif metadata rotation in jpg is ignored in image texture from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:29 AM · Documentation, Pipeline, Assets & I/O, Render & Cycles, Images & Movies, BF Blender
Evan Wilson (EAW) moved T83457: UDIM tiled images with generated contents dont render in Cycles from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:28 AM · Render & Cycles, Images & Movies, BF Blender
Evan Wilson (EAW) moved T81199: Some effects [bloom, smoke, fire, ..] still don't save in PNG with transparent background (occlusion vs. emission) from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · Render Pipeline, Images & Movies, BF Blender
Evan Wilson (EAW) moved T75178: Reversing frames on video sequencer don't play them backwards from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · VFX & Video, Images & Movies, Video Sequencer, BF Blender
Evan Wilson (EAW) moved T74777: UDIM issue when switch from Tiled to Single and back to Tiled from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · User Interface, Images & Movies, BF Blender
Evan Wilson (EAW) moved T71087: Image.save_render saves OpenEXR Multilayer as a regular OpenEXR with no layers from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · Python API, Images & Movies, BF Blender
Evan Wilson (EAW) moved T70584: Heavy EXR images use too much memory when loading them (e.g. multi-threaded thumbnail generation causes swapping) from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · Core, Images & Movies, BF Blender
Evan Wilson (EAW) moved T70495: "Pack Image" with PSD files not working from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · Pipeline, Assets & I/O, Images & Movies, BF Blender
Evan Wilson (EAW) moved T61708: Encoding to MPEG-4(divx) in constant quality mode ignores Output quality settings from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · Render & Cycles, Images & Movies, Render Pipeline, BF Blender
Evan Wilson (EAW) moved T60947: FFMpeg color offset from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · VFX & Video, Images & Movies, BF Blender
Evan Wilson (EAW) moved T60221: TIFF 8bit always saved and loaded as unassociated alpha from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:27 AM · VFX & Video, Images & Movies, BF Blender
Evan Wilson (EAW) moved T53969: Cycles is not rendering .dds file format correctly from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:26 AM · Render & Cycles, Images & Movies, Cycles, BF Blender
Evan Wilson (EAW) moved T54461: Unable to export/import EXR files after doing `import bpy` and when using the multiprocessing in Python (Blender freezes) from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:26 AM · Python API, Images & Movies, BF Blender
Evan Wilson (EAW) moved T82790: Fully transparent generated images draw colors in image editor from Backlog to Known Issue on the Images & Movies board.
Wed, Jan 5, 7:26 AM · Images & Movies, BF Blender, EEVEE & Viewport
Evan Wilson (EAW) added a project to T82790: Fully transparent generated images draw colors in image editor: Images & Movies.
Wed, Jan 5, 7:25 AM · Images & Movies, BF Blender, EEVEE & Viewport

Tue, Jan 4

Albin Eldstål-Ahrens (eldstal) added a comment to T94629: Out-of-bounds memory access in IMB_flipy() due to large image dimensions.

In addition, some dimensions such as x=844193 and y=6364 are such that bottomf wraps around and then passes topf, resulting in bottomf > topf which may look safe. During the loop, however, bottomf will eventually be decremented to fall below topf and once again trigger the fault.

Tue, Jan 4, 11:29 PM · Images & Movies, BF Blender
Albin Eldstål-Ahrens (eldstal) added a comment to T94629: Out-of-bounds memory access in IMB_flipy() due to large image dimensions.

The proposed fix is useful, but insufficient.

Tue, Jan 4, 9:40 PM · Images & Movies, BF Blender
Jesse Yurkovich (deadpin) changed the status of T94629: Out-of-bounds memory access in IMB_flipy() due to large image dimensions from Needs Triage to Confirmed.
Tue, Jan 4, 6:36 PM · Images & Movies, BF Blender
Albin Eldstål-Ahrens (eldstal) added a comment to D11952: Fix T89542: Crash when loading certain .hdr files.

T94629 has been filed. I am indeed fuzzing the blender codebase, as a hobby exercise. I don't think any particular support is needed - my output is bug reports and possibly patches.

Tue, Jan 4, 12:41 PM · Images & Movies
Jesse Yurkovich (deadpin) added a comment to D11952: Fix T89542: Crash when loading certain .hdr files.

@Albin Eldstål-Ahrens (eldstal) Yes, file a separate issue for that and yes I can confirm the issue too and your analysis. It looks like you're doing a fuzzing exercise here. I can't speak for the project as a whole but I'm not sure what kind of support we can provide for such an endeavor. It might be best to run this by some folks over on https://blender.chat/channel/blender-coders first to see what can be done here.

Tue, Jan 4, 11:54 AM · Images & Movies
Albin Eldstål-Ahrens (eldstal) added a comment to D11952: Fix T89542: Crash when loading certain .hdr files.

It's an integer overflow in IMB_flipy at rotate.c:71.

Tue, Jan 4, 11:44 AM · Images & Movies
Albin Eldstål-Ahrens (eldstal) added a comment to D11952: Fix T89542: Crash when loading certain .hdr files.

I haven't had time to figure out the exact cause yet, but the following HDR image still manages to cause an out-of-bounds read (in IMB_flipy()) even with the above patch applied:

Tue, Jan 4, 11:06 AM · Images & Movies
Philipp Oeser (lichtwerk) added a task to D11952: Fix T89542: Crash when loading certain .hdr files: T94572: Out-of-bounds memory access due to malformed HDR image file.
Tue, Jan 4, 9:24 AM · Images & Movies