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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}")
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