在 2013年12月4日星期三UTC+8下午5时38分27秒，Andreas Perstinger写道：
> iMath <redstone-c...@163.com> wrote:
>
> >I use the following code to do the test ,but error occurred ,it
>
> >prompts system cannot find specified files ,but the files are indeed
>
> >exists there ,any help ?
>
> >
>
> >with tempfile.TemporaryFile() as fp:
>
> > fp.write(("file '"+'a1.mp3'+"'\n").encode('utf-8'))
>
> > fp.write(("file '"+'a2.mp3'+"'\n").encode('utf-8'))
>
> >
>
> > subprocess.call(['ffmpeg/ffmpeg', '-f', 'concat','-i',fp, '-c',
>
> > 'copy', 'a3.mp3'])
>
>
>
> Basic rule: Always copy'n'paste the exact traceback you get.
>
>
>
> I don't think you are running the code you have posted because your
>
> subprocess call doesn't work:
>
>
>
> >>> import tempfile, subprocess
>
> >>> with tempfile.TemporaryFile() as fp:
>
> ... subprocess.call(["foo", "bar", fp, "baz"])
>
> ...
>
> Traceback (most recent call last):
>
> File "<stdin>", line 2, in <module>
>
> File "/usr/lib/python3.3/subprocess.py", line 520, in call
>
> with Popen(*popenargs, **kwargs) as p:
>
> File "/usr/lib/python3.3/subprocess.py", line 820, in __init__
>
> restore_signals, start_new_session)
>
> File "/usr/lib/python3.3/subprocess.py", line 1380, in _execute_child
>
> restore_signals, start_new_session, preexec_fn)
>
> TypeError: Can't convert '_io.BufferedRandom' object to str implicitly
>
>
>
> "fp" is a file object, but subprocess expects a list of strings as
>
> its first argument.
>
>
>
> Bye, Andreas
sorry for my fuss.
it prompts
StdErr: -c: No such file or directory
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