02-12-2012
FFMPEG install problem on Unix
Guys,
I'm new on Unix and I was hoping you could help me installing ffmpeg on Apple TV 1st Gen, which is a Unix based OS. This is the version of Unix.
Darwin AppleTV.local 8.8.2 Darwin Kernel Version 8.8.2: Mon Jan 29 18:57:29 PST 2007; root:xnu-792.94.18~1/RELEASE_I386 i386 i386
I was following the tutorial on the page Link: documentation.hwdmediashare.co.uk/wiki/Setting_up_your_server_for_hwdVideoShare#Install_FFMPEG but the "make distclean" and the following commands didn't work. It shows "command not found".
Do you know why does it happen? Do I have to install a package or something extra?
Here are the commands that didn't work:
# make distclean # ./configure --enable-gpl --enable-version3 --enable-nonfree --enable-shared --enable-libmp3lame --enable-libx264 --enable-libfaac --enable-libvorbis --enable-libopencore-amrnb --enable-libopencore-amrwb # make clean && make && make install # make tools/qt-faststart
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LEARN ABOUT OSX
dispatch_semaphore_wait
dispatch_semaphore_create(3) BSD Library Functions Manual dispatch_semaphore_create(3)
NAME
dispatch_semaphore_create, dispatch_semaphore_signal, dispatch_semaphore_wait -- synchronized counting semaphore
SYNOPSIS
#include <dispatch/dispatch.h>
dispatch_semaphore_t
dispatch_semaphore_create(long count);
long
dispatch_semaphore_signal(dispatch_semaphore_t semaphore);
long
dispatch_semaphore_wait(dispatch_semaphore_t semaphore, dispatch_time_t timeout);
DESCRIPTION
Dispatch semaphores are used to synchronize threads. The timeout parameter is creatable with the dispatch_time(3) or dispatch_walltime(3)
functions.
COMPLETION SYNCHRONIZATION
If the count parameter is equal to zero, then the semaphore is useful for synchronizing completion of work. For example:
sema = dispatch_semaphore_create(0);
dispatch_async(queue, ^{
foo();
dispatch_semaphore_signal(sema);
});
bar();
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
FINITE RESOURCE POOL
If the count parameter is greater than zero, then the semaphore is useful for managing a finite pool of resources. For example, a library
that wants to limit Unix descriptor usage:
sema = dispatch_semaphore_create(getdtablesize() / 4);
At each Unix FD allocation:
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
fd = open("/etc/services", O_RDONLY);
When each FD is closed:
close(fd);
dispatch_semaphore_signal(sema);
RETURN VALUES
The dispatch_semaphore_create() function returns NULL if no memory is available or if the count parameter is less than zero.
The dispatch_semaphore_signal() function returns non-zero when a thread is woken. Otherwise, zero is returned.
The dispatch_semaphore_wait() function returns zero upon success and non-zero after the timeout expires. If the timeout is DISPATCH_TIME_FOR-
EVER, then dispatch_semaphore_wait() waits forever and always returns zero.
MEMORY MODEL
Dispatch semaphores are retained and released via calls to dispatch_retain() and dispatch_release().
CAVEATS
Unbalanced dispatch semaphores cannot be released. For a given semaphore, calls to dispatch_semaphore_signal() and dispatch_semaphore_wait()
must be balanced before dispatch_release() is called on it.
SEE ALSO
dispatch(3), dispatch_object(3)
Darwin May 1, 2009 Darwin