Missing H.264 decoder but it isn't?
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Missing H.264 decoder but it isn't?
 
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The decodebin element seems to be claiming the I don't have a H264 decoder available (see below).
But gst-inspect-1.0 avdec_h264 says it is. What might be going on here? Could it be something similar to this old issue? http://gstreamer-devel.966125.n4.nabble.com/Missing-element-H-264-decoder-sometimes-for-Raspberry-Pi-td4662003.html or is my installation genuinely broken somehow? This is on Debian 9 with good, bad and ugly plugins installed. GST_DEBUG=3 gst-launch-1.0 -v filesrc location=multi.ts ! tsparse ! tsdemux program_number=17540 ! decodebin caps=audio/x-raw ! audioconvert ! audioresample ! audio/x-raw, rate=8000, channels=1 ! wavenc ! filesink location=cbbc.wav 2>&1 | tee err Setting pipeline to PAUSED ... 0:00:00.087246734 18349 0x557f3e5cb990 WARN basesrc gstbasesrc.c:3491:gst_base_src_start_complete:<filesrc0> pad not activated yet Pipeline is PREROLLING ... /GstPipeline:pipeline0/MpegTSParse2:mpegtsparse2-0.GstPad:src: caps = video/mpegts, systemstream=(boolean)true, packetsize=(int)188 /GstPipeline:pipeline0/GstTSDemux:tsdemux0.GstPad:sink: caps = video/mpegts, systemstream=(boolean)true, packetsize=(int)188 0:00:00.094903539 18349 0x557f3e597680 FIXME mpegtsbase mpegtsbase.c:416:mpegts_base_add_program: Refcounting. Setting twice a PID (0x0010) as known PSI /GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal, parsed=(boolean)true 0:00:00.127770575 18349 0x557f3e597680 ERROR bcmdec gstbcmdec.c:875:gst_bcm_dec_change_state:<bcmdec0> dev open failed -1 0:00:00.129039704 18349 0x557f3e597680 ERROR bcmdec gstbcmdec.c:876:gst_bcm_dec_change_state:<bcmdec0> dev open failed...ret GST_STATE_CHANGE_FAILURE 0:00:00.129498419 18349 0x557f3e597680 WARN decodebin gstdecodebin2.c:2306:connect_pad:<decodebin0> Couldn't set bcmdec0 to READY 0:00:00.130062166 18349 0x557f3e597680 ERROR bcmdec gstbcmdec.c:2374:bcmdec_del_shmem:<bcmdec0> bcmdec_del_shmem:deleted shmem segment ... DtsGetHWFeatures: Create File Failed DtsGetHWFeatures: Create File Failed Running DIL (3.22.0) Version DtsDeviceOpen: Opening HW in mode 0 DtsDeviceOpen: Create File Failed Missing element: H.264 decoder 0:00:00.131375083 18349 0x557f3e597680 WARN decodebin gstdecodebin2.c:4592:gst_decode_bin_expose:<decodebin0> error: no suitable plugins found: Couldn't set bcmdec0 to READY ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0: Your GStreamer installation is missing a plug-in. Additional debug info: gstdecodebin2.c(4592): gst_decode_bin_expose (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0: no suitable plugins found: Couldn't set bcmdec0 to READY ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... Freeing pipeline ... -----Original Message----- From: gstreamer-devel [mailto:[hidden email]] On Behalf Of Adams, Bruce (KMLWG) Sent: 23 May 2018 14:37 To: Discussion of the development of and with GStreamer Subject: RE: correct way to decode AAC? The decodebin element is perhaps a bit of overkill here. Consider this pipeline: gst-launch-1.0 -v filesrc location=multi.ts ! tsparse ! tsdemux program_number=17540 ! decodebin ! audioconvert ! audioresample ! audio/x-raw, rate=8000, channels=1 ! wavenc ! filesink location=cbbc.wav I get the error: Missing element: H.264 decoder ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0: Your GStreamer installation is missing a plug-in. Additional debug info: gstdecodebin2.c(4592): gst_decode_bin_expose (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0: There are patent issues with H264 but yes it would be nice to fix my install. My point though is that I don't care about the video in this pipeline. I really just want an "OR" element Try decoding using A or B E.g. Src = audio/mpeg Sink = audio/x-raw If src=AAC use avdec_aac If src=MPEG use faad Of course the decodebin element gives us that and more but is there a standard way of doing this or a case for something leaner? Regards, Bruce. -----Original Message----- From: gstreamer-devel [mailto:[hidden email]] On Behalf Of Adams, Bruce (KMLWG) Sent: 23 May 2018 12:57 To: Discussion of the development of and with GStreamer Subject: RE: correct way to decode AAC? What is the purpose of the queue in that pipeline? -----Original Message----- From: gstreamer-devel [mailto:[hidden email]] On Behalf Of new baby Sent: 23 May 2018 12:54 To: [hidden email] Subject: RE: correct way to decode AAC? Found the BEST way Directly convert .ts to .wav file like this ... Hope it solves all your worries *gst-launch-1.0 filesrc location=Transformers1080p.ts ! queue ! decodebin ! audioconvert ! wavenc ! filesink location=file.wav * ----- adi -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel Kantar Disclaimer<http://www.kantar.com/disclaimer.html> _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Hi Adams,
decodebin is picking hardware decoder "bcmdec" to decode h264 stream. bcmdec Plugin is not able to open the device and pipeline closed with error. To use avdec_h264 you have have 2 options. 1. Remove "bcmdec" plugin 2. Change avdec_h264 rank so that decodebin autoplug picks avdec_h264 over bcmdec. Check plugin writer guides to check how alter the plugins rank. Check if this is usefull for you. https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPluginFeature.html Here bcmdec is Broadcom hardware decoder. This is not there in mainstream Gstreamer plugin. https://github.com/agx/gst-plugins-bad/blob/master/ext/bcmdec/gstbcmdec.c -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
RE: Missing H.264 decoder but it isn't?
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Hi,
Thanks. That definitely moves things along. It seems I had bmcdec installed because I installed crystalhd. show install: gst-inspect-1.0 bcmdec show what to uninstall (Debian): dpkg --search /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstbcmdec.so - And uninstall it: sudo apt-get remove gstreamer1.0-crystalhd Presumably I could have blacklisted it instead but I don't know how. It also looks like increasing the rank would be straightforward in code. I had a follow up problem, decodebin and tsdemux seemed intent on supplying video when I want audio. The solution was a caps filter or two. A working pipeline for me is: GST_DEBUG=0 gst-launch-1.0 -v filesrc location=multi.ts ! tsparse ! tsdemux program_number=17540 ! audio/mpeg ! decodebin ! audio/x-raw ! audioresample ! audioconvert ! audio/x-raw, rate=8000, channels=1 ! wavenc ! filesink location=cbbc.wav Thanks for the advice. Regards, Bruce. -----Original Message----- From: gstreamer-devel [mailto:[hidden email]] On Behalf Of Vinod Kesti Sent: 24 May 2018 06:13 To: [hidden email] Subject: Re: Missing H.264 decoder but it isn't? Hi Adams, decodebin is picking hardware decoder "bcmdec" to decode h264 stream. bcmdec Plugin is not able to open the device and pipeline closed with error. To use avdec_h264 you have have 2 options. 1. Remove "bcmdec" plugin 2. Change avdec_h264 rank so that decodebin autoplug picks avdec_h264 over bcmdec. Check plugin writer guides to check how alter the plugins rank. Check if this is usefull for you. https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPluginFeature.html Here bcmdec is Broadcom hardware decoder. This is not there in mainstream Gstreamer plugin. https://github.com/agx/gst-plugins-bad/blob/master/ext/bcmdec/gstbcmdec.c -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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