bender -b blender_file.blend -o result.png -f 0

result.png0000

blender -b file.blend -P image_preview.py

import bpy


try:
  scene
except NameError:
  scene = None


if scene is None:
  scene = bpy.context.screen.scene


scene.render.resolution_percentage = 100
scene.render.resolution_x = 1920
scene.render.resolution_y = 1080

scene.frame_end = scene.frame_current
scene.frame_start = scene.frame_current

scene.render.filepath = "//preview.png"
scene.render.use_overwrite = False
scene.render.use_file_extension = False
scene.render.use_placeholder = False
scene.render.image_settings.file_format = 'PNG'


bpy.ops.render.render( write_still=True )