Problem showing mp4 examples on Spaces

Spaces
1

Hi,

I have a problem with Gradio and HuggingFace Spaces.
The problem is that when I try to set examples in this way:

intput_components = [
        input_video,
        dd_model,
        features,
        dd_track_points,
        slide_threshold,
    ]

output_components = "playablevideo"

example_list = [["examples/" + example] for example in os.listdir("examples")]

iface = gr.Interface(
    fn=inference,
    inputs=intput_components,
    outputs=output_components,
    examples=example_list,
)

iface.launch()

where each element of the input_components list is a Gradio component.

When I run this code locally I do not have any problems showing the examples (mp4 videos).

I have Git LFS set properly.

This is the error that the logs show me when I run this code on Spaces, but if I remove the attribute examples there is no error in that execution. For this reason, I do not understand the error and there is any possibility of a bug on the deploy process.

Traceback (most recent call last):
  File "app.py", line 40, in <module>
    iface = gr.Interface(
  File "/home/user/.local/lib/python3.8/site-packages/gradio/interface.py", line 626, in __init__
    self.examples_handler = Examples(
  File "/home/user/.local/lib/python3.8/site-packages/gradio/examples.py", line 56, in create_examples
    utils.synchronize_async(examples_obj.create)
  File "/home/user/.local/lib/python3.8/site-packages/gradio/utils.py", line 364, in synchronize_async
    return fsspec.asyn.sync(fsspec.asyn.get_loop(), func, *args, **kwargs)
  File "/home/user/.local/lib/python3.8/site-packages/fsspec/asyn.py", line 96, in sync
    raise return_result
  File "/home/user/.local/lib/python3.8/site-packages/fsspec/asyn.py", line 53, in _runner
    result[0] = await coro
  File "/home/user/.local/lib/python3.8/site-packages/gradio/examples.py", line 208, in create
    await self.cache_interface_examples()
  File "/home/user/.local/lib/python3.8/site-packages/gradio/examples.py", line 246, in cache_interface_examples
    prediction = await self.predict_example(example_id)
  File "/home/user/.local/lib/python3.8/site-packages/gradio/examples.py", line 263, in predict_example
    predictions = await anyio.to_thread.run_sync(self.fn, *processed_input)
  File "/home/user/.local/lib/python3.8/site-packages/anyio/to_thread.py", line 31, in run_sync
    return await get_asynclib().run_sync_in_worker_thread(
  File "/home/user/.local/lib/python3.8/site-packages/anyio/_backends/_asyncio.py", line 937, in run_sync_in_worker_thread
    return await future
  File "/home/user/.local/lib/python3.8/site-packages/anyio/_backends/_asyncio.py", line 867, in run
    result = context.run(func, *args)
TypeError: inference() missing 4 required positional arguments: 'model', 'features', 'track_points', and 'model_threshold'
2

Hello @diegofernandezc,

Do you still have issues with your space ? Is so could you provide the link to the space ?

3

Hello @chris-rannou

This is the space: Norfair - a Hugging Face Space by tryolabs

4

I can confirm the examples files are included in the deployed space.
I tried and submit one of them norfair_demo.mp4 which worked as expected.
Did you check the gradio version locally matches the one for the space ?
Could you try adding the examples with an absolute path ? (/home/user/app/examples)

5

@diegofernandezc Can you try setting cache_examples=False in the interface init? This is a bug in gradio. By default on spaces, gradio will try to cache the example outputs but that will not work if only some of the inputs are provided as examples.

6

Thanks @freddyaboulton this was the solution to my problem.

Greetings.

7

Thanks for the reply @chris-rannou, the solution was the @freddyaboulton reply.

Greetings.

8

Hi again @chris-rannou @freddyaboulton

I fixed this problem by setting default arguments to the function called by the interface.

This function fails with cache_examples=True because when the app starts it doesn’t receive any arguments to run over the example videos.

Greetings.

9

Thanks @diegofernandezc ! I filed this github issue a couple of days ago to provide a clearer error message in this case: Interfaces which provide partial examples will crash on Spaces · Issue #2239 · gradio-app/gradio · GitHub