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00ca755231
When doing version probes for ffmpeg, do the
equivalent of calling it as:
ffmpeg -version <&-
Where <&- is shell syntax for closing stdin before calling the
program. This is roughly equivalent to </dev/null without actually
opening /dev/null.
This prevents ffmpeg -version from hanging when run in the background.
Fixes #955.
The reason is that ffmpeg tries to manipulate stdin to set up terminal
characteristic, and that causes the kernel to suspend the parent
process (youtube-dl).
Note that closing stdin is achieved by calling subprocess.Popen() with
stdin set to subprocess.PIPE and without passing any input to
Popen.communicate(). This is somewhat subtle.
|
9 years ago | |
|---|---|---|
| .. | ||
| downloader | 9 years ago | |
| extractor | 9 years ago | |
| postprocessor | 9 years ago | |
| YoutubeDL.py | 9 years ago | |
| __init__.py | 9 years ago | |
| __main__.py | ||
| aes.py | ||
| cache.py | ||
| compat.py | 9 years ago | |
| jsinterp.py | 9 years ago | |
| options.py | 9 years ago | |
| socks.py | 9 years ago | |
| swfinterp.py | ||
| update.py | 9 years ago | |
| utils.py | 9 years ago | |
| version.py | 9 years ago | |