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TypeError: object async_generator can't be used in 'await' expression #1
Description
Python 3.12
uv pip install flash-attn --no-build-isolation (not from link)
When auto-captioning is enabled, the function start_caption_generation—which is defined as an asynchronous generator—gets awaited directly in the on_import_success function. This results in the following error:
TypeError: object async_generator can't be used in 'await' expression
Context
The error occurs because start_caption_generation uses yield to produce multiple updates and therefore returns an async generator. Directly awaiting an async generator is not allowed. Instead, the generator should either be iterated over using an async for loop or scheduled as a background task using asyncio.create_task.
This issue is observed in app.py around line 1004 in the on_import_success function.
Code Snippet
In app.py (around line 1004):
async def on_import_success(enable_splitting, enable_automatic_content_captioning, prompt_prefix):
videos = self.list_unprocessed_videos()
if videos and not self.splitter.is_processing() and enable_splitting:
await self.start_scene_detection(enable_splitting)
msg = "Starting automatic scene detection..."
else:
for video_file in VIDEOS_TO_SPLIT_PATH.glob("*.mp4"):
await self.splitter.process_video(video_file, enable_splitting=False)
msg = "Copying videos without splitting..."
copy_files_to_training_dir(prompt_prefix)
# Start auto-captioning if enabled
if enable_automatic_content_captioning:
await self.start_caption_generation(
DEFAULT_CAPTIONING_BOT_INSTRUCTIONS,
prompt_prefix
)
return {
tabs: gr.Tabs(selected="split_tab"),
video_list: videos,
detect_status: msg
}