<div dir="ltr"><div dir="ltr"><div dir="ltr"><span class="gmail-ui-provider ec gmail-bzn gmail-bob gmail-bzo gmail-bzp gmail-bzq gmail-bzr gmail-bzs gmail-bzt gmail-bzu gmail-bzv gmail-bzw gmail-bzx gmail-bzy gmail-bzz gmail-caa gmail-cab gmail-cac gmail-cae gmail-caf gmail-cag gmail-cah gmail-cai gmail-caj gmail-cak gmail-cal gmail-cam gmail-can gmail-cao gmail-cap gmail-caq gmail-car gmail-cas gmail-cat gmail-cau" dir="ltr">Hi All, I am working on a v4l2 decoder and encoder which works on dmabuf-import mode on both capture and output interface. But it is evident from the log that v4l2encoder throws error if downstream plugin does not provide a pool example pipeline : gst-launch-1.0 videotestsrc ! v4l2h264enc capture-io-mode=5 output-io-mode=5 ! fakesink gst_v4l2_object_decide_allocation:<v4l2h264enc0> error: When importing DMABUF or USERPTR, we need a pool to import from Similarly in case of decoder also if upstream plugin pushes non-fd buffer then pipeline throws error dmabuf import failed. example pipeline : gst-launch-1.0 filesrc location=/1.mp4 ! qtdemux ! h264parse ! v4l2h264dec capture-io-mode=5 output-io-mode=5 ! fakesink gst_v4l2_allocator_import_dmabuf:<v4l2h264dec0:pool0:sink:allocator> Memory 0 is not of DMABUFv4l2bufferpool gstv4l2bufferpool.c:396:gst_v4l2_buffer_pool_import_dmabuf:<v4l2h264dec0:pool0:sink> failed to import dmabuf What is the recommendation to handle such cases? 1. Implement a two separate gstreamer plugins which generates dma buffers, for example predmabufgen and postdmabufgen in the following examples Example Pipeline: gst-launch-1.0 filesrc location=/1.mp4 ! qtdemux ! h264parse ! predmabufgen v4l2h264dec capture-io-mode=5 output-io-mode=5 ! postdmabufgen ! fakesinkgst-launch-1.0 videotestsrc ! predmabufgen ! v4l2h264enc capture-io-mode=5 output-io-mode=5 ! postdmabufgen ! fakesink 2. Allocate dmabuf in the v4l2dec/v4l2enc plugin in case of dmabuf-import if downstream is not providing a pool or upstream plugin is snot sending fd buffer? ThanksArindam</div></div></div>