export background

bl_utils.py

@@ -2,9 +2,19 @@
 """
 Generic Blender functions
 """
+import os
+from pathlib import Path
+import subprocess
+import json
+from textwrap import dedent
 
 import bpy
 
+
+def abspath(path):
+    path = os.path.abspath(bpy.path.abspath(path))
+    return Path(path)
+
 def get_scene_settings():
     return bpy.context.scene.vsetb_settings
 
@@ -17,7 +27,27 @@ def get_strip_settings():
 
     return strip.vsetb_strip_settings
 
-def get_bl_cmd(blender=None, background=False, focus=True, blendfile=None, script=None, **kargs):
+def norm_arg(arg_name):
+    return "--" + arg_name.replace(' ', '-')
+
+def norm_value(value):
+    if isinstance(value, (tuple, list)):
+        values = []
+        for v in value:
+            if not isinstance(v, str):
+                v = json.dumps(v)
+            values.append(v)
+
+        return values       
+    
+    if isinstance(value, Path):
+        return str(value)
+
+    if not isinstance(value, str):
+        value = json.dumps(value)
+    return value
+
+def get_bl_cmd(blender=None, background=False, focus=True, blendfile=None, script=None, output=None, **kargs):
     cmd = [str(blender)] if blender else [bpy.app.binary_path]
 
     if background:
@@ -31,6 +61,9 @@ def get_bl_cmd(blender=None, background=False, focus=True, blendfile=None, scrip
 
     if blendfile:
         cmd += [str(blendfile)]
+    
+    if output:
+        cmd += ['-o', str(output)]
         
     if script:
         cmd += ['--python', str(script)]
@@ -49,6 +82,28 @@ def get_bl_cmd(blender=None, background=False, focus=True, blendfile=None, scrip
 
     return cmd
 
+
+def background_render(output=None):
+    #bpy.context.scene.render.filepath = '{output}'
+    script_code = dedent(f"""
+        import bpy
+        bpy.context.scene.render.filepath = '{str(output)}'
+        bpy.ops.render.render(animation=True)
+        bpy.ops.wm.quit_blender()
+        """)
+
+    tmp_blend = Path(bpy.app.tempdir) / Path(bpy.data.filepath).name
+    bpy.ops.wm.save_as_mainfile(filepath=str(tmp_blend))
+
+    script_path = Path(bpy.app.tempdir) / 'render_blender_background.py'
+    script_path.write_text(script_code)
+
+    cmd = get_bl_cmd(blendfile=tmp_blend, script=script_path, background=True)
+
+    print('Background Render...')
+    print(cmd)
+    subprocess.Popen(cmd)
+
 def get_addon_prefs():
     addon_name = __package__.split('.')[0]
     return bpy.context.preferences.addons[addon_name].preferences