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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi, I’m having difficulties setting up a streaming pipeline on an imx6 running the mainline kernel and gstreamer 1.14.1.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">The following pipelines work as required
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">This streaming pipeline withot dma buffers and using openh264 drops lots of frames<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">./test-launch "( v4l2src min-buffers=16 device=/dev/v4l/by-path/platform-capture-subsystem-video-index4 ! video/x-raw,format=NV12,width=1920,height=1080,framerate=60000/1001,interlace-mode=progressive,colorimetry=bt709
! videorate drop-only=true skip-to-first=true !videoconvert ! video/x-raw,framerate=30/1 ! openh264enc ! video/x-h264,profile=baseline ! queue ! h264parse ! rtph264pay name=pay0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">pt=96 )"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">This recording pipeline using dma buffers and v4l2h264enc storing to file also works<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">gst-launch-1.0 v4l2src min-buffers=10 num-buffers=150 device=/dev/v4l/by-path/platform-capture-subsystem-video-index4 io-mode=dmabuf ! video/x-raw,format=NV12,width=1920,height=1080,framerate=60000/1001
! v4l2h264enc output-io-mode=dmabuf-import extra-controls=cid,video_bitrate=12000000,video_gop_size=30 ! h264parse ! qtmux ! filesink location=ZNB_30fps_2.mp4<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">but streaming using v4l2h264enc and dma buffers doesn’t work<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">./test-launch "( v4l2src min-buffers=10 device=/dev/v4l/by-path/platform-capture-subsystem-video-index4 io-mode=4 ! video/x-raw,format=NV12,width=1920,height=1080,framerate=60000/1001,interlace-mode=progressive,colorimetry=bt709
! v4l2h264enc output-io-mode=5 output-min-buffers=6 ! video/x-h264,profile=baseline ! rtph264pay name=pay0 pt=96 )"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">The following log is produced<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.327381335 634 0x74f0f2f0 WARN v4l2bufferpool gstv4l2bufferpool.c:804:gst_v4l2_buffer_pool_start:<v4l2h264enc0:pool:src> Uncertain or not enough
buffers, enabling copy threshold<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.582559335 634 0x74f0f2f0 WARN v4l2videoenc gstv4l2videoenc.c:782:gst_v4l2_video_enc_handle_frame:<v4l2h264enc0> error: Failed to allocate required
memory.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.582796001 634 0x74f0f2f0 WARN v4l2videoenc gstv4l2videoenc.c:782:gst_v4l2_video_enc_handle_frame:<v4l2h264enc0> error: Buffer pool activation
failed<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.583304001 634 0x74f0f2f0 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop:<v4l2src0> error: Internal data stream error.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.583435001 634 0x74f0f2f0 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop:<v4l2src0> error: streaming stopped, reason error (-5)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.583347335 634 0x75c0e860 WARN rtspmedia rtsp-media.c:2720:default_handle_message: 0x75c1ce18: got error Failed to allocate required memory.
(gstv4l2videoenc.c(782): gst_v4l2_video_enc_handle_frame (): /GstPipeline:media-pipeline/GstBin:bin0/v4l2h264enc:v4l2h264enc0:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Buffer pool activation failed)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.583797668 634 0x10adc90 WARN rtspmedia rtsp-media.c:2989:wait_preroll: failed to preroll pipeline<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.583841335 634 0x75c0e860 WARN rtspmedia rtsp-media.c:2720:default_handle_message: 0x75c1ce18: got error Internal data stream error. (gstbasesrc.c(3055):
gst_base_src_loop (): /GstPipeline:media-pipeline/GstBin:bin0/GstV4l2Src:v4l2src0:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">streaming stopped, reason error (-5))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.584003001 634 0x10adc90 WARN rtspmedia rtsp-media.c:3293:gst_rtsp_media_prepare: failed to preroll pipeline<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.601349335 634 0x10adc90 ERROR rtspclient rtsp-client.c:1044:find_media: client 0x10b8898: can't prepare media<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">0:00:07.603700001 634 0x10adc90 ERROR rtspclient rtsp-client.c:2898:handle_describe_request: client 0x10b8898: no media<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Maybe someone has an explanation as to what is wrong with the last pipeline. I can’t explain why it doesn’t work<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">It also makes no difference if I reduce the framerate using videorate.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Thanks for any replies<o:p></o:p></span></p>
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