如何通过 espeak 和 aplay 使用 python Popen
How to use python Popen with a espeak and aplay
我想打电话给
espeak -ves -s130 'HEY' --stdout | aplay -D 'sysdefault'
至 subprocess.Popen，以及
espeak_process = Popen(["espeak", "-ves -s100 'HEY' --stdout"], stdout=subprocess.PIPE)
aplay_process = Popen(["aplay", "-D 'sysdefault'"], stdin=espeak_process.stdout, stdout=subprocess.PIPE)
但是不行
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM 'sysdefault'
aplay: main:682: audio open error: No such file or directory
知道如何实现吗？
谢谢
您的示例相当于在 shell:
中键入此内容
$ espeak '-ves -s100 \'HEY\' --stdout'
$ aplay '-D \'sysdefault\''
这显然是错误的。每个列表条目都是传递给可执行文件的一个参数（argv 条目），您这边不需要 escaping/quoting。所以你想使用：
["aplay", "-D", "sysdefault"]
["espeak", "-ves", "-s100", "HEY", "--stdout"],
另见 the documentation（强调我的）：
args is required for all calls and should be a string, or a sequence of program arguments. Providing a sequence of arguments is generally preferred, as it allows the module to take care of any required escaping and quoting of arguments (e.g. to permit spaces in file names). If passing a single string, either shell must be True (see below) or else the string must simply name the program to be executed without specifying any arguments.
我想打电话给
espeak -ves -s130 'HEY' --stdout | aplay -D 'sysdefault'
至 subprocess.Popen，以及
espeak_process = Popen(["espeak", "-ves -s100 'HEY' --stdout"], stdout=subprocess.PIPE)
aplay_process = Popen(["aplay", "-D 'sysdefault'"], stdin=espeak_process.stdout, stdout=subprocess.PIPE)
但是不行
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM 'sysdefault'
aplay: main:682: audio open error: No such file or directory
知道如何实现吗？ 谢谢
您的示例相当于在 shell:
中键入此内容$ espeak '-ves -s100 \'HEY\' --stdout'
$ aplay '-D \'sysdefault\''
这显然是错误的。每个列表条目都是传递给可执行文件的一个参数（argv 条目），您这边不需要 escaping/quoting。所以你想使用：
["aplay", "-D", "sysdefault"]
["espeak", "-ves", "-s100", "HEY", "--stdout"],
另见 the documentation（强调我的）：
args is required for all calls and should be a string, or a sequence of program arguments. Providing a sequence of arguments is generally preferred, as it allows the module to take care of any required escaping and quoting of arguments (e.g. to permit spaces in file names). If passing a single string, either shell must be True (see below) or else the string must simply name the program to be executed without specifying any arguments.