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| import librosa | |
| import numpy as np | |
| import av | |
| from io import BytesIO | |
| def wav2(i, o, format): | |
| inp = av.open(i, 'rb') | |
| if format == "m4a": format = "mp4" | |
| out = av.open(o, 'wb', format=format) | |
| if format == "ogg": format = "libvorbis" | |
| if format == "mp4": format = "aac" | |
| ostream = out.add_stream(format) | |
| for frame in inp.decode(audio=0): | |
| for p in ostream.encode(frame): out.mux(p) | |
| for p in ostream.encode(None): out.mux(p) | |
| out.close() | |
| inp.close() | |
| def audio2(i, o, format, sr): | |
| inp = av.open(i, 'rb') | |
| out = av.open(o, 'wb', format=format) | |
| if format == "ogg": format = "libvorbis" | |
| if format == "f32le": format = "pcm_f32le" | |
| ostream = out.add_stream(format, channels=1) | |
| ostream.sample_rate = sr | |
| for frame in inp.decode(audio=0): | |
| for p in ostream.encode(frame): out.mux(p) | |
| out.close() | |
| inp.close() | |
| def load_audio(file, sr): | |
| try: | |
| file = ( | |
| file.strip(" ").strip('"').strip("\n").strip('"').strip(" ") | |
| ) # 防止小白拷路径头尾带了空格和"和回车 | |
| with open(file, "rb") as f: | |
| with BytesIO() as out: | |
| audio2(f, out, "f32le", sr) | |
| return np.frombuffer(out.getvalue(), np.float32).flatten() | |
| except AttributeError: | |
| audio = file[1] / 32768.0 | |
| if len(audio.shape) == 2: | |
| audio = np.mean(audio, -1) | |
| return librosa.resample(audio, orig_sr=file[0], target_sr=16000) | |
| except Exception as e: | |
| raise RuntimeError(f"Failed to load audio: {e}") | |