[Error] The frame has 0 channels, expected 1.
#2
by
ikalachy
- opened
Running:
import torch
from transformers import AutoProcessor, MoonshineForConditionalGeneration
from datasets import load_dataset
processor = AutoProcessor.from_pretrained("UsefulSensors/moonshine-tiny")
model = MoonshineForConditionalGeneration.from_pretrained("UsefulSensors/moonshine-tiny")
ds = load_dataset("jacktol/ATC-ASR-Dataset", "default", split="validation")
print(ds[0])
audio_array = ds[0]["audio"]["array"]
inputs = processor(audio_array, return_tensors="pt")
generated_ids = model.generate(**inputs)
transcription = processor.batch_decode(generated_ids, skip_special_tokens=True)[0]
print(transcription)
getting The frame has 0 channels, expected 1. If you are hitting this, it may be because you are using a buggy FFmpeg version. FFmpeg4 is known to fail here in some valid scenarios. Try to upgrade FFmpeg?
How to get audio_array
On my PC, running the exact code you gave yields:
{'id': '020ZTX6P8Z5D5EUSC74C', 'audio': {'path': '020ZTX6P8Z5D5EUSC74C.wav', 'array': array([ 0.00045776, 0.00054932, 0.00061035, ..., 0.0005188 ,
-0.00057983, -0.00106812]), 'sampling_rate': 16000}, 'text': 'PRAGA RADAR HELLO AEROFLOT TWO EIGHT FIVE APPROACHING TUSIN FLIGHT LEVEL TWO FOUR ZERO'}
It is strongly recommended to pass the `sampling_rate` argument to `Wav2Vec2FeatureExtractor()`. Failing to do so can result in silent errors that might be hard to debug.
President of the House of Representatives, Joe A. Twice, but he has to send quite a little to Bulgaria.
So it doesn't seem to be a code issue, but an FFMPEG issue. I'm on Windows using this version of FFMPEG:
ffmpeg version 2025-03-31-git-35c091f4b7-full_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers
built with gcc 14.2.0 (Rev1, Built by MSYS2 project)
But I remember running into this issue on a Linux machine once before, and yeah to my suprise it actually was my FFMPEG version which was the issue, not the code. I uninstalled the current version I had installed, cloned the FFMPEG repo, checked out version 7.1.1 and built it, and then the error resolved.
Best of luck!
jacktol
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