For editing purposes, it's fairly common to use a sequence of images files, not a video file. Most editing software support them (DaVinci Resolve definitively do), and you don't have to struggle with codecs, bitrate or whatever.
In your output settings, just select a picture file format. Png is great if you have a transparent background. Lossless Jpeg is ...
You were right, it's in the .stl batch exporter. I ran into the same problem with .FBX and apparently gave up too soon.
Go to the directory
<path to blender.exe>\2.83\scripts\addons\io_mesh_stl
and open the
line 299, replace
keywords_temp["filepath"] = prefix + bpy.path.clean_name(ob.name) + ".stl"
glTF has a straightforward node hierarchy, where children always inherit all of their parent's transforms. It may not be able to exactly match Blender's options for things like "Inherit Rotation" specifically.
That said, there is an "Always Sample Animations" checkbox under the animation section of the glTF exporter. This is on by ...
You can do batch export from Blender in the same way as described in Export multiple objects to .obj, but with the glTF export API. That said, I think a standalone CLI converter might be easier to use in this case, like obj2gltf.
I almost give it up :)
You have set body material in View Layer Properties > Override - you have to disable it.
Second thing is your UVMap - rotated 90 deg. = squized image.
If you would like to fix it, it would be such painful unwrap each feather so I would suggest just to rotate original images to landscape orintation.
Third thing is - "someone&...
To do this directly in blender use the import images as planes addon.
On the options to import (made visible if you press N or the gear icon on the right) check the Offset Planes box.
Choose the Y axis. and set the material to emit
The images will be imported as a long strip.
Create an output size that is thin and tall, set an orthographic camera and align ...
Every object that you want to rotate (by script) has to be shild of an Empty Object, so the script responsible for the transformation, has to change the rotation of the Empty Object.
Rotate(Vectors3.up * value) will really be the Y (Unity) axis.
Use Blender 2.79 and DO NOT use NODES..
Instead use the "usual image parameter editing methods"..
Export as *.obj and restart.
Blender DAE Exporter supports 5 images..
These are based on
Ambient (treated by assimp as the lightmap (a second lightmap UV))
(there might be more from other apps)