Kernel error during changing play video: Oct 20 07:33:58 PXDEVICE kernel: ------------[ cut here ]------------ Oct 20 07:33:58 PXDEVICE kernel: 3038 pages are still in use! Oct 20 07:33:58 PXDEVICE kernel: WARNING: CPU: 2 PID: 559 at mm/page_alloc.c:9275 free_contig_range+0xa4/0xc0 Oct 20 07:33:58 PXDEVICE kernel: Modules linked in: snd_soc_imx_spdif snd_soc_imx_hdmi snd_soc_wm8904 fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine rng_core authenc libdes imx8mq_interconnect imx_interconnect crct10dif_ce imx8m_ddrc governor_userspace imx_bus rtc_ds1307 snd_soc_fsl_spdif secvio caam error snd_soc_fsl_sai imx_sdma nfsd galcore(O) fuse Oct 20 07:33:58 PXDEVICE kernel: CPU: 2 PID: 559 Comm: QSGRenderThread Tainted: G W O 5.15.60-imx8mq+geeb831e225df #1 Oct 20 07:33:58 PXDEVICE kernel: Hardware name: Variscite DART-MX8M on DT8MCustomBoard 2.x and above SD+HDMI (DT) Oct 20 07:33:58 PXDEVICE kernel: pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) Oct 20 07:33:58 PXDEVICE kernel: pc : free_contig_range+0xa4/0xc0 Oct 20 07:33:58 PXDEVICE kernel: lr : free_contig_range+0xa4/0xc0 Oct 20 07:33:58 PXDEVICE kernel: sp : ffff80001bae3ae0 Oct 20 07:33:58 PXDEVICE kernel: x29: ffff80001bae3ae0 x28: ffff0000c1bac740 x27: 0000000000000000 Oct 20 07:33:58 PXDEVICE kernel: x26: 0000000000000000 x25: ffff0000c2e8cc00 x24: 0000000000000000 Oct 20 07:33:58 PXDEVICE kernel: x23: ffff80000980e248 x22: fffffc0000000000 x21: 00000000000d72d8 Oct 20 07:33:58 PXDEVICE kernel: x20: 0000000000000bde x19: 00000000000d72d8 x18: ffffffffffffffff Oct 20 07:33:58 PXDEVICE kernel: x17: 0000000000000000 x16: 0000000000000000 x15: ffff800009efe96e Oct 20 07:33:58 PXDEVICE kernel: x14: ffffffffffffffff x13: ffff800009d82810 x12: 000000000000067b Oct 20 07:33:58 PXDEVICE kernel: x11: 0000000000000229 x10: ffff800009d82810 x9 : ffff800009d82810 Oct 20 07:33:58 PXDEVICE kernel: x8 : 00000000ffffefff x7 : ffff800009dda810 x6 : ffff800009dda810 Oct 20 07:33:58 PXDEVICE kernel: x5 : ffff0000ff7839d0 x4 : 0000000000000000 x3 : 0000000000000027 Oct 20 07:33:58 PXDEVICE kernel: x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c1bac740 Oct 20 07:33:58 PXDEVICE kernel: Call trace: Oct 20 07:33:58 PXDEVICE kernel: free_contig_range+0xa4/0xc0 Oct 20 07:33:58 PXDEVICE kernel: cma_release+0x78/0xbc Oct 20 07:33:58 PXDEVICE kernel: dma_free_contiguous+0xa8/0xbc Oct 20 07:33:58 PXDEVICE kernel: dma_direct_free+0xbc/0x110 Oct 20 07:33:58 PXDEVICE kernel: dma_free_attrs+0x9c/0xe0 Oct 20 07:33:58 PXDEVICE kernel: vb2_dc_put+0x88/0xc0 Oct 20 07:33:58 PXDEVICE kernel: vb2_dc_dmabuf_ops_release+0x14/0x50 Oct 20 07:33:58 PXDEVICE kernel: dma_buf_release+0x40/0xa0 Oct 20 07:33:58 PXDEVICE kernel: __dentry_kill+0x13c/0x1d0 Oct 20 07:33:58 PXDEVICE kernel: dput+0x1c4/0x300 Oct 20 07:33:58 PXDEVICE kernel: __fput+0xb0/0x234 Oct 20 07:33:58 PXDEVICE kernel: ____fput+0x10/0x20 Oct 20 07:33:58 PXDEVICE kernel: task_work_run+0x80/0x180 Oct 20 07:33:58 PXDEVICE kernel: do_notify_resume+0x208/0x12ec Oct 20 07:33:58 PXDEVICE kernel: el0_svc+0x6c/0x80 Oct 20 07:33:58 PXDEVICE kernel: el0t_64_sync_handler+0xa4/0x130 Oct 20 07:33:58 PXDEVICE kernel: el0t_64_sync+0x1a0/0x1a4 Oct 20 07:33:58 PXDEVICE kernel: ---[ end trace 65d78baf2fb2bd43 ]--- Oct 20 07:33:58 PXDEVICE kernel: ------------[ cut here ]------------ Oct 20 07:33:58 PXDEVICE kernel: 3038 pages are still in use! Oct 20 07:33:58 PXDEVICE kernel: WARNING: CPU: 2 PID: 559 at mm/page_alloc.c:9275 free_contig_range+0xa4/0xc0 Oct 20 07:33:58 PXDEVICE kernel: Modules linked in: snd_soc_imx_spdif snd_soc_imx_hdmi snd_soc_wm8904 fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine rng_core authenc libdes imx8mq_interconnect imx_interconnect crct10dif_ce imx8m_ddrc governor_userspace imx_bus rtc_ds1307 snd_soc_fsl_spdif secvio caam error snd_soc_fsl_sai imx_sdma nfsd galcore(O) fuse Oct 20 07:33:58 PXDEVICE kernel: CPU: 2 PID: 559 Comm: QSGRenderThread Tainted: G W O 5.15.60-imx8mq+geeb831e225df #1 ... Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: CODEC: BLN_MAD-MMCODECS_AACD_ARM_03.09.00_ARMV8 build on Sep 20 2017 15:02:50. Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ====== AIUR: 4.7.0 build on May 20 2022 06:51:21. ====== Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Core: MPEG4PARSER_06.20.06 build on May 7 2022 07:52:31 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: file: /usr/lib/imx-mm/parser/lib_mp4_parser_arm_elinux.so.3.2 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ------------------------ Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Track 00 [video_0] Enabled Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Duration: 0:02:07.127000000 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Language: und Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Mime: Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: video/x-h265, parsed=(boolean)true, alignment=(string)au, stream-format=(string)hev1, width=(int)3840, height=(int)2160, framerate=(fraction)60000/1001, codec_data=(buffer)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 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ------------------------ Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ------------------------ Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Track 01 [audio_0] Enabled Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Duration: 0:02:07.168000000 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Language: eng Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Mime: Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: audio/mpeg, mpegversion=(int)4, channels=(int)2, rate=(int)48000, bitrate=(int)192000, stream-format=(string)raw, codec_data=(buffer)1190 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ------------------------ Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ====== BEEP: 4.7.0 build on May 20 2022 06:51:21. ====== Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Core: AAC decoder Wrapper build on Jul 28 2020 10:45:34 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: file: /usr/lib/imx-mm/audio-codec/wrap/lib_aacd_wrap_arm_elinux.so.3 Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: CODEC: BLN_MAD-MMCODECS_AACD_ARM_03.09.00_ARMV8 build on Sep 20 2017 15:02:50. Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: Oct 20 07:33:58 PXDEVICE PXDEVICE-main[501]: ====== V4L2DEC: 1.20.0 build on Apr 24 2022 09:19:42. ======

Then your package manager provides EOL-software! You can download later versions via the link in @Christian-Ehrlicher's signature.

can you share the gstreamer link or pkgconfig exe

@vicky_mac The old gstreamer versions have memory leaks. Which gstreamer version are you using? Try to upgrade to the latest gstreamer. Your Qt is old as well. Upgrade your Qt to at least 5.15.2.

I needed to switch my project to Qt5 and tried using setMedia and gst:pipeline but that wasn't working for me either. Right now, the pipeline below works as it connects to the camera I need it to and opens the gstreamer output. However, it opens it in a new window and not the Qt Video Widget I am using. I know autovideosink ignores the window overlay, but I tried other sinks and just got a black screen. How could I get this to work? I tried glimagesink which worked for the videotestsrc but it did not work for this. w->pipeline = gst_parse_launch( "udpsrc port=8000 ! application/x-rtp, encoding-name=H264, payload=109 ! rtph264depay ! h264parse ! queue ! avdec_h264 ! videoconvert ! autovideosink", NULL); /* [4] Set video overlay */ gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(w->pipeline), w->getVideoWinID()); /* [5] Run the pipeline */ qDebug() << "------------------------------ Starting pipeline ------------------------------"; GstStateChangeReturn sret = gst_element_set_state(w->pipeline, GST_STATE_PLAYING); if (sret == GST_STATE_CHANGE_FAILURE) { gst_element_set_state(w->pipeline, GST_STATE_NULL); gst_object_unref(w->pipeline); }

Hi, AFAIK, that's a define. You want to use GST_DEBUG_DUMP_DOT_DIR. Note that this requires an active use of the macros like explained there. Set this environment variable to a path to turn on all GST_DEBUG_BIN_TO_DOT_FILE or GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS calls and have the dot files in that location. This will only work if the application in question makes these calls in strategic places (like when the pipeline state changes or an error occurs). gst-launch-1,0 is one such application.

@hyperlight This is a member pointer defined in the class header in which it is used. Learn some hungary notation. Some people hate it. I use it, but not strictly. https://en.wikipedia.org/wiki/Hungarian_notation

You should check the configure logs to see exactly what is failing. You should also do an out of source build so you can more easily nuke and restart when you change something or you have an error and need to restart.

Hi, That's rather a question you should bring to the GStreamer folks. For the Qt side you can then use QMediaPlayer as shown here with a custom pipeline.

Rather than giving the pointer to your MainWindow instance, pass directly the pointer to your label. Basically: mainwindow->ui->label

I have older version of QT5.11.3 and cannot update. So want solution for this version.

@SGaist I'll try to cross compile qt again and let you know the error . Meanwhile can you please share any link where i can get the procedure about how to cross compile qt for zynq mpsoc devices. Thanx.

[image: 76eb5c40-4e61-4b6b-ae89-0ce60cf6bd0e.png] I have these versions . It does not work when i build directly on raspberry pi .

No, gstreamer is the Linux backend. On Windows, IIRC it's DirectX for the camera access.

I was able to solve the problem where fontconfig was not able to find libexpat by adding the following in my xplatform qmake.conf QMAKE_LINK = $HOST-g++ -lts -L/opt/qt/qt5.9.1arm/lib -Wl,-rpath -Wl,/opt/qt/qt5.9.1arm/lib QMAKE_LINK_SHLIB= $HOST-g++ -lts -L/opt/qt/qt5.9.1arm/lib -Wl,-rpath -Wl,/opt/qt/qt5.9.1arm/lib

Hi, Check the version of gstreamer that the plugin uses. It could be 0.1. In that case the quick and dirty way is to install that version of gstreamer with the corresponding plugin packages. Hope it helps

Whenever I manually use the stop function to stop the video I am getting this error

Depending on your needs, QAudioOutput is rather a lightweight alternative but QMediaPlayer is indeed easier to setup and run. Glad you found out and thanks for sharing !