<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style></style></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1>Bernhard,<o:p></o:p><o:p> </o:p>Thanks for your suggestion.<o:p></o:p><o:p> </o:p>Unfortunately, I still get a no more pads error if I remove the ac3 parser and decoder.<o:p></o:p><o:p> </o:p>The thing is I know that the stream has ac3 audio from ffprobe for example:<o:p></o:p><o:p> </o:p>Input #0, mpegts, from 'udp://@231.8.6.7:5309':<o:p></o:p> Duration: N/A, start: 31264.580500, bitrate: N/A<o:p></o:p> Program 1 <o:p></o:p> Stream #0:3[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, max. 79975 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc<o:p></o:p> Stream #0:4[0x33](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s<o:p></o:p> Stream #0:2[0x34](SPA): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/<o:p></o:p><o:p> </o:p>As far as I can tell from the log, gstreamer recognizes an ac3 audio track and fails to link the pads. But it doesn’t give much information other than it failed to link. I can’t tell why it failed to link.<o:p></o:p><o:p> </o:p>Thanks,<o:p></o:p>Rand<o:p></o:p><o:p> </o:p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'>From: gstreamer-devel [mailto:gstreamer-devel-bounces@lists.freedesktop.org] On Behalf Of Bernhard Graaf Sent: Wednesday, November 28, 2018 12:31 PM To: 'Discussion of the development of and with GStreamer' <gstreamer-devel@lists.freedesktop.org> Subject: AW: failed link of audio to ac3parse<o:p></o:p></div></div><o:p> </o:p>The audiostreams seams to be x-raw (not ac3).<o:p></o:p>Try to use your pipeline without the ac3 parser and decoder.<o:p></o:p>Voaacenc sink pad has the x-raw capabilities.<o:p></o:p><o:p> </o:p>Bernhard<o:p></o:p><o:p> </o:p><div><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="100%" align=center></div>Von: gstreamer-devel [<a href="mailto:gstreamer-devel-bounces@lists.freedesktop.org">mailto:gstreamer-devel-bounces@lists.freedesktop.org</a>] Im Auftrag von Rand Graham Gesendet: Dienstag, 27. November 2018 21:51 An: Discussion of the development of and with GStreamer Betreff: RE: failed link of audio to ac3parse<o:p></o:p></div><o:p> </o:p>Can someone tell from the logs what the problem with linking the audio is?<o:p></o:p><o:p> </o:p>Thanks,<o:p></o:p>Rand<o:p></o:p><o:p> </o:p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'>From: gstreamer-devel [<a href="mailto:gstreamer-devel-bounces@lists.freedesktop.org">mailto:gstreamer-devel-bounces@lists.freedesktop.org</a>] On Behalf Of Rand Graham Sent: Tuesday, November 13, 2018 11:34 AM To: Discussion of the development of and with GStreamer <<a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>> Subject: failed link of audio to ac3parse<o:p></o:p></div></div><o:p> </o:p>Hello,<o:p></o:p><o:p> </o:p>I am trying to find out why tsdemux fails to link the audio in the pipeline below. <o:p></o:p>The source has ac3 audio. <o:p></o:p>The tsdemux finds the audio track. <o:p></o:p>Gstreamer attempts to link tsdemux to ac3parse. <o:p></o:p>Why does gstreamer say the caps are incompatible?<o:p></o:p><o:p> </o:p>gst-launch-1.0 -v -e mpegtsmux name=m ! hlssink target-duration='15' udpsrc multicast-iface=lo uri=udp://231.8.6.7:5309 ! tsdemux ! ac3parse ! avdec_eac3 ! audioconvert ! voaacenc bitrate=128000 ! m.<o:p></o:p><o:p> </o:p>0:00:00.432638221 8327 0x1305400 INFO structure gststructure.c:2597:gst_structure_get_valist: Expected field 'channel-mask' in structure: audio/x-raw, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000 }, channels=(int)1, layout=(string)interleaved;<o:p></o:p>0:00:00.433040355 8327 0x1305400 INFO GST_ELEMENT_PADS gstutils.c:1227:gst_element_get_compatible_pad:<ac3parse0> Could not find a compatible pad to link to tsdemux0:video_0_0031<o:p></o:p>0:00:00.433082164 8327 0x1305400 INFO GST_PADS gstutils.c:1035:gst_pad_check_link: trying to link tsdemux0:audio_0_0033 and ac3parse0:sink<o:p></o:p>0:00:00.433321928 8327 0x1305400 INFO structure gststructure.c:2597:gst_structure_get_valist: Expected field 'channel-mask' in structure: audio/x-raw, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000 }, channels=(int)1, layout=(string)interleaved;<o:p></o:p>0:00:00.433674575 8327 0x1305400 INFO GST_ELEMENT_PADS gstelement.c:920:gst_element_get_static_pad: found pad ac3parse0:sink<o:p></o:p>0:00:00.433713938 8327 0x1305400 INFO GST_PADS gstutils.c:1588:prepare_link_maybe_ghosting: tsdemux0 and ac3parse0 in same bin, no need for ghost pads<o:p></o:p>0:00:00.433753875 8327 0x1305400 INFO GST_PADS gstpad.c:2378:gst_pad_link_prepare: trying to link tsdemux0:audio_0_0033 and ac3parse0:sink<o:p></o:p>0:00:00.434008825 8327 0x1305400 INFO structure gststructure.c:2597:gst_structure_get_valist: Expected field 'channel-mask' in structure: audio/x-raw, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000 }, channels=(int)1, layout=(string)interleaved;<o:p></o:p>0:00:00.434310938 8327 0x1305400 INFO GST_PADS gstpad.c:2434:gst_pad_link_prepare: caps are incompatible<o:p></o:p><o:p> </o:p><o:p> </o:p>Regards,<o:p></o:p>Rand<o:p></o:p><o:p> </o:p></div></body></html>