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--></style></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>If I use vaapipostproc in the chain with vaapisink it seems ok, so I think it does dmabuff, <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>but when I use io-mode=dmabuf-import with v4l2sink I get “Failed to allocated required memory” <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>gst-launch-1.0 filesrc location=/mnt/DATA/tearing.mp4 ! decodebin ! v4l2sink io-mode=dmabuf-import device=/dev/video10<br>…<br>0:00:00.376954941 18843 0x7f4d44041460 ERROR v4l2allocator gstv4l2allocator.c:740:gst_v4l2_allocator_start:<v4l2sink0:pool1:sink:allocator> error requesting 2 buffers: Invalid argument<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>0:00:00.377023310 18843 0x7f4d44041460 ERROR v4l2bufferpool gstv4l2bufferpool.c:920:gst_v4l2_buffer_pool_start:<v4l2sink0:pool1:sink> we received 0 buffer from device '/dev/video10', we want at least 2<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>0:00:00.377052711 18843 0x7f4d44041460 ERROR bufferpool gstbufferpool.c:559:gst_buffer_pool_set_active:<v4l2sink0:pool1:sink> start failed<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>v4l2-ctl -d /dev/video0 --all<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Driver Info:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Driver name : v4l2 loopback<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Card type : Dummy video device (0x0000)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Bus info : platform:v4l2loopback-000<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Driver version : 5.15.49<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Capabilities : 0x85208003<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Video Capture<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Video Output<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Video Memory-to-Memory<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Read/Write<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Streaming<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Extended Pix Format<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Device Capabilities<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Device Caps : 0x05208003<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Video Capture<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Video Output<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Video Memory-to-Memory<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Read/Write<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Streaming<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Extended Pix Format<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Priority: 2<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Video input : 0 (loopback: ok)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Video output: 0 (loopback in)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Format Video Output:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Width/Height : 1920/1080<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> </span><span style='mso-fareast-language:EN-US'>Pixel Format : 'NV12' (Y/CbCr 4:2:0)<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'> </span><span lang=EN-US style='mso-fareast-language:EN-US'>Field : None<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Bytes per Line : 1920<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Size Image : 3110400<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Colorspace : Rec. 709<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Transfer Function : sRGB<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> YCbCr/HSV Encoding: ITU-R 601<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Quantization : Limited Range<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Flags :<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Streaming Parameters Video Capture:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Frames per second: 30.000 (30/1)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Read buffers : 2<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>Streaming Parameters Video Output:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Frames per second: 30.000 (30/1)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> Write buffers : 2<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'>User Controls<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> keep_format 0x0098f900 (bool) : default=0 value=0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> sustain_framerate 0x0098f901 (bool) : default=0 value=0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> timeout 0x0098f902 (int) : min=0 max=100000 step=1 default=0 value=0 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'> timeout_image_io 0x0098f903 (bool) : default=0 value=0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b>Von:</b> Nicolas Dufresne <nicolas@ndufresne.ca> <br><b>Gesendet:</b> Sonntag, 6. November 2022 14:32<br><b>An:</b> Discussion of the development of and with GStreamer <gstreamer-devel@lists.freedesktop.org><br><b>Cc:</b> Christian Hattenberger <christian.hattenberger@gmail.com><br><b>Betreff:</b> Re: Why is connecting vaapi decoder to v4l2sink stuttering?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><div><p class=MsoNormal>Le sam. 5 nov. 2022, 13 h 16, Christian Hattenberger via gstreamer-devel <<a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>> a écrit :<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><p style='margin:0cm;margin-bottom:.0001pt;font-stretch:normal'><span style='font-size:14.5pt;font-family:"UICTFontTextStyleBody",serif;color:black'>When I connect a vaapi decoder to v4l2sink the result is not as expected, same happens if I use autovideosink, I know for this I have to use vaapisink and it is working as expected, but is there a solution for v4l2sink? Can someone explain me the reason, is there a solution?</span><span style='font-size:14.5pt;color:black'><o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;font-stretch:normal;min-height:24.7px'><span style='font-size:14.5pt;color:black'><o:p> </o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;font-stretch:normal'><span style='font-size:14.5pt;font-family:"UICTFontTextStyleBody",serif;color:black'>gst-launch-1.0 filesrc location=/tmp/video.mp4 ! decodebin ! vaapipostproc ! video/x-raw,format=YUY2 ! v4l2sink device=/dev/video10 </span><span style='font-size:14.5pt;color:black'><o:p></o:p></span></p></div></blockquote></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Its experimental, and I am not sure if vaapipostproc does produce dmabuf in this case, but you can enable dmabuf-import on v4l2sink with property io-mode=dmabuf-import . By default, the frames are cpu copied from VA allocated memory into V4L2 allocated memory.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Nicolas<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>