[FFmpeg-devel] mutlithreading in ffmpeg?

[Reimar Döffinger]

On 29 Mar 2011, at 03:32, Frank Barchard <fbarchard at google.com> wrote:
> On Sun, Mar 27, 2011 at 2:52 AM, Reimar Döffinger
> <Reimar.Doeffinger at gmx.de>wrote:
> 
>> On Sat, Mar 26, 2011 at 12:14:40PM +0100, Michael Niedermayer wrote:
>>> This patch looks like it would break if libavcodec would be linked
>>> with an application that itself also used static pthreads
>> 
>> Not to mention that it will crash if an application dynamically loads
>> libavcodec and then unloads it before exiting (i.e. the atexit code
>> will no longer exist when the program exits).
>> 
> Thats what Chromium does - Each tab is a process that loads avcodec-52.dll.
> Closing a tab unloads the dll.
> A DLL is really an .exe.  The atexit code runs when the DLL is unloaded.

At least "man atexit" does not specify any such behaviour, are you really sure you're not relying on an implementation detail?
Actually, are you really sure that you unload the avcodec dll separately before exiting the tab process, that seems like a pointless thing to do.