>I do not konw. I notice that vf_scale() is not using >sws_alloc_context(), then setting options then sws_init_context() while >you use sws_getContext(), which includes sws_init_context(), and then >you set the threads options. Therefore, I suspect you need to set the >threads options before sws_init_context() is called. I think I've started to understand how it works — ffmpeg does not use SwsContext / sws_getContext / sws_scale from exlample muxing.c, but AVFilterContext for scale But why how to set threads for mjpeg codec context!? >Please remember that top-posting is forbidden on this mailing-list; if >you do not know what it means look it up. Ок.
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