I'm looking into the Blender Video Sequence Editor to create animations out of existing sequences of images. The image sequences are generated with POV-ray. I've downloaded Blender 2.79, I run W7 64-bit.
I did a test and I noticed that in the rendered video the background color was quite different from the source. For the source images the background color is White: RGB(255,255,255). In the rendered video the background color is a bluish grey. I took a screenshot, copypasted it in GIMP, and according to GIMP the color is RGB(234,234,245).
What can be the cause of that change of color, and is there a way to prevent that from happening?
For rendering settings I followed as much as possible the recommendations in the VSE tutorial series by Mikeycal Meyers.
Mikeycal Meyers recommends for the 'encoding': Xvid, and the dropdown menu does show that option:
Note that after clicking on the option 'Xvid' the text displayed in the 'encoding' field remains 'presets', so it is unknown whether or not Blender has accepted the 'Xvid' selection.
I have zero knowledge of which 'container' setting and which 'codec' setting will suit my purposes. I chose 'mpeg-4' pretty much at random.
The video that I have in mind will be a combination of some 2D scenes (white background), some 3D scenes (white background), and a couple of shots filmed with some form of video camera.
I assume that all the shots that are to be combined into a video must be rendered with the same codec. Since some of the shots will be camera shots I assume the codec that is to be used needs to be a general purpose codec rather than some special purpose codec.
What can be the cause of the change of the background color? Is it perhaps something that the Blender VSE has done, or is it perhaps an artifact of the codec that was used (or perhaps a combination of both)?
Is it perhaps the case that the codec that was used is not designed to preserve color? I did expect the type of barely noticible color blurring that you get with jpeg compression, but the sweeping change of background color comes as a total surprise to me.
Since multiple difference image sequences will be incorporated in the final video it is essential that the background color is absolutely consistent, otherwise there will be a jarring change of background color going from scene to scene.
I gave Blender a good night's sleep, and after restarting the computer and restarting Blender I noticed something had returned that was gone the previous session: a video editor preview. (See the screenshot of the full Blender window: only a checkerboard pattern, but no preview.)
When I drag the vertical green line in the video sequence editor the preview displays the corresponding frame from the source image sequence.