[FFmpeg-trac] #7508(avfilter:new): split filter: lack of hwaccel support

FFmpeg trac at avcodec.org
Mon Oct 22 14:52:54 EEST 2018

#7508: split filter: lack of hwaccel support
             Reporter:  msiders      |                     Type:
               Status:  new          |  enhancement
            Component:  avfilter     |                 Priority:  normal
             Keywords:  split,       |                  Version:  git-
  hwaccel                            |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0

 When using the -hwaccel support, if the frame is inside the GPU memory
 then it's impossible to use the "split" filter to duplicate the frames
 without downloading the frame to the main memory. So a complex
 hwdownad+split+hwupload is required.

 This is a waste of resources, as a simple frame duplication in the CPU
 memory can be done without much effort.

 I suggest to add this support to the "split" filter, or create a new one
 called "hwsplit".
 Anyone interested?

Ticket URL: <https://trac.ffmpeg.org/ticket/7508>
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