On Thu, 20 Mar 2014 03:57:57 +0100 Michael Niedermayer <michaelni at gmx.at> wrote: > +/** > + * Do not thread synchronization. > + * This allows av_log() to be used from a signal handler but may lead to > + * garbled output. > + */ > +#define AV_LOG_ASYNC 0x1000 > void av_log_set_flags(int arg); Just for ffmpeg.c? Please no...