Oh thanks! That's what I want! One more question... do you know if it is possible to send ALL the image with two different qualities, a HQ for this "window" and LQ for the other part of the image.
Thanks!!! On Wed, Aug 19, 2015 at 11:42 AM, Moritz Barsnick <barsn...@gmx.net> wrote: > On Wed, Aug 19, 2015 at 10:29:20 +0200, Marc Camacho Cateura wrote: > > Is exist a way to cut the video and stream only a window that change the > > position? I need a way to tell the ffmpeg what zone I want in realtime... > > Like paramterization of coordinates to crop? > > If you know beforehand what to change, you can use expressions as > parameters to the crop filter. Although I can't get it to work right now, > the syntax would be: > > -vf "crop=if(gte(t\,10)\,200\,100):if(gte(t\,20)\,100\,50)" > > (At 10 seconds, the width changes from 100 to 200. At 20 seconds, the > height changes from 50 to 100.) > > As you mention "realtime": The zmq filter can dynamically receive > commands to change parameters of other filters: > > -vf "crop=640:480:100:100,zmq" > > You then need to send commands to the zmq server with a tool like > zmqsend: > > $ echo Parsed_crop_0 out_h 400 | tools/zmqsend > $ echo Parsed_crop_0 x 150 | tools/zmqsend > $ echo Parsed_crop_0 y 200 | tools/zmqsend > > These examples change the crop filter's parameters out_h, x, y, > respectively. > > (I haven't found a lot of documentation on this, unfortunately. For > example, I haven't figured out how to change two parameters at the same > time.) > > Moritz > > P.S.: ffmpeg needs to be compiled with zmq support for this filter to > be available. > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user