Hi Andrew,
On Thu, Sep 8, 2016 at 3:59 AM, qw <applema...@163.com> wrote:
> I have made one simple transcoding program by using ffmpeg lib, where
> several av transcoding tasks are done in one process and each task
> corresponds to one thread.
>
> But some ffmpeg function will report error, and sometimes the multi-thread
> version of transcoding program will crash abnormally.
>
> For example, av_guess_format("mp4", NULL, NULL) returns error accidentally
> with several concurrent tasks. And transcoding program will crash, when
> calling av_interleaved_write_frame ().
>
Have you tried running this under valgrind? It is typically very helpful to
see what causes the crash.
does ffmpeg support multi-thread in this case? If not, which ffmpeg
> functions should be synchronized by application developer?
Yes, ffmpeg supports multi-threading (internally), it is tested
continuously and is considered very safe.
Can you show some code? I'm wondering if your use is unusual.
Ronald
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
