Value Error('unknown file extension:') error for some gltf files

[shyam98]

I export fbx or obj files from Solidworks visualize then using blender to convert them to gltf. When taking those gltf files and running them through gltf2usd I get this error. Let me know if here is anything I can do to fix this, thanks! (The glTF files look perfectly fine and have textures as well)

Traceback (most recent call last): File "gltf2usd.py", line 923, in <module> convert_to_usd(os.path.expanduser(args.gltf_file), os.path.abspath(os.path.expanduser(args.usd_file)), args.fps, args.scale, args.arkit, args.verbose, args.use_euler_rotation, args.optimize_textures, args.generate_texture_transform_texture, args.scale_texture) File "gltf2usd.py", line 832, in convert_to_usd usd = GLTF2USD(gltf_file=gltf_file, usd_file=temp_usd_file, fps=fps, scale=scale, verbose=verbose, use_euler_rotation=use_euler_rotation, optimize_textures=optimize_textures, generate_texture_transform_texture=generate_texture_transform_texture, scale_texture=scale_texture) File "gltf2usd.py", line 56, in __init__ self.gltf_loader = GLTF2Loader(gltf_file, optimize_textures, generate_texture_transform_texture) File "/home/centos/gltf2usd/Source/_gltf2usd/gltf2loader.py", line 117, in __init__ self._initialize() File "/home/centos/gltf2usd/Source/_gltf2usd/gltf2loader.py", line 123, in _initialize self._initialize_images() File "/home/centos/gltf2usd/Source/_gltf2usd/gltf2loader.py", line 142, in _initialize_images self._images.append(GLTFImage.GLTFImage(image_entry, i, self, self._optimize_textures, self._generate_texture_transform_texture)) File "/home/centos/gltf2usd/Source/_gltf2usd/gltf2/GLTFImage.py", line 46, in __init__ img.save(self._image_path, optimize=self._optimize_textures) File "/usr/lib64/python2.7/site-packages/PIL/Image.py", line 1932, in save raise ValueError('unknown file extension: {}'.format(ext)) ValueError: unknown file extension:

[Plscall922]

Have same issue here with blender 2.8 gltf files

Traceback (most recent call last):
File "C:\gltf2usd-master\Source\gltf2usd.py", line 923, in
convert_to_usd(os.path.expanduser(args.gltf_file), os.path.abspath(os.path.expanduser(args.usd_file)), args.fps, args.scale, args.arkit, args.verbose, args.use_euler_rotation, args.optimize_textures, args.generate_texture_transform_texture, args.scale_texture)
File "C:\gltf2usd-master\Source\gltf2usd.py", line 832, in convert_to_usd
usd = GLTF2USD(gltf_file=gltf_file, usd_file=temp_usd_file, fps=fps, scale=scale, verbose=verbose, use_euler_rotation=use_euler_rotation, optimize_textures=optimize_textures, generate_texture_transform_texture=generate_texture_transform_texture, scale_texture=scale_texture)
File "C:\gltf2usd-master\Source\gltf2usd.py", line 56, in init
self.gltf_loader = GLTF2Loader(gltf_file, optimize_textures, generate_texture_transform_texture)
File "C:\gltf2usd-master\Source_gltf2usd\gltf2loader.py", line 117, in init
self._initialize()
File "C:\gltf2usd-master\Source_gltf2usd\gltf2loader.py", line 123, in _initialize
self._initialize_images()
File "C:\gltf2usd-master\Source_gltf2usd\gltf2loader.py", line 142, in _initialize_images
self._images.append(GLTFImage.GLTFImage(image_entry, i, self, self._optimize_textures, self._generate_texture_transform_texture))
File "C:\gltf2usd-master\Source_gltf2usd\gltf2\GLTFImage.py", line 37, in init
img.save(self._image_path, optimize=self._optimize_textures)
File "C:\Python27\lib\site-packages\PIL\Image.py", line 1932, in save
raise ValueError('unknown file extension: {}'.format(ext))
ValueError: unknown file extension:

[Plscall922]

So I found solution that works for me!

When export from blender to gltf You need to choose Format: glTF Separate(.gltf + .bin + textures)

Then gltf2usd sript will work as it should!