On Thu, 2 Jul 2015 15:36:43 +0000 "Stevens, Christoph (Christoph)" <christoph.stevens at alcatel-lucent.com> wrote: > I surely overlooking something Wrong mailing list (again). Your question belongs on libav-user; not ffmpeg-devel, not ffmpeg-user. Please re-re-read: http://ffmpeg.org/contact.html