使用 mediainfo 在 python3 中运行 check_output 会产生错误，即使终端中的相同调用工作正常

Question

This is the code:

try:
    s = check_output(['mediainfo', '--Inform=General;%Format%', filename])  # Gets the output from mediainfo

When running it, I get

subprocess.CalledProcessError: Command '['mediainfo', '--Inform=General;%Format%', 'xyz']' returned non-zero exit status 1

When running mediainfo --Inform='Video;%Format%' s03e07.mkv in a terminal, I get the desired output though, so what's going on here?

Answer 1

There is nothing wrong with the first two arguments. there are two strong possibilities, you are reading from a file and you have trailing whitespace on the filename:

"sample.mkv\n"

Or you current working directory is not where the file is so you need to pass the full path or set cwd="path_to_filr_dir" in check_output call.