网上 pyav 的资料很少,特此将研究出的代码做个记录
注意: 仅针对 wav 转 mp3/ogg 做过测试,不保证能转换其他格式
代码
from av import open as avopen
# i/o: file-like obj
# format: 欲转换到的格式
def wav2(i, o, format):
inp = avopen(i, 'rb') # 自动判断格式
out = avopen(o, 'wb', format=format) # 设定目标格式
if format == "ogg": format = "libvorbis" # ogg 特判
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()
用例
- 文件到文件
with open("a.wav", "rb") as i:
with open("a.ogg", "wb") as o:
wav2(i, o, "ogg")
- 文件到BytesIO
with open("a.wav", "rb") as i:
with BytesIO() as o:
wav2(i, o, "ogg")