Missing avenc_mpeg4 plugin

This seems to be a recurring problem on the forum that the avenc_mpeg4 plugin cannot be found. Followed all the instructions for installation of DeepStream 6 SDK on Jetson Nano last week. Ran into this missing plugin issue when we are attempting to run the deepstream-opticalflow.py sample. We reflashed the system and repeated the steps. Same issue. Clearing the cache does not resolve the issue either. Reinstalling the libav plugin just tells us it is already installed. What are we doing wrong?

~$ gst-inspect-1.0
amrwbdec: amrwbdec: AMR-WB audio decoder
pbtypes: GstVideoMultiviewFlagsSet (GstDynamicTypeFactory)
multifile: multifilesrc: Multi-File Source
multifile: multifilesink: Multi-File Sink
multifile: splitfilesrc: Split-File Source
multifile: splitmuxsink: Split Muxing Bin
multifile: splitmuxsrc: Split File Demuxing Bin
encoding: encodebin: Encoder Bin
flv: flvdemux: FLV Demuxer
flv: flvmux: FLV muxer
equalizer: equalizer-nbands: N Band Equalizer
equalizer: equalizer-3bands: 3 Band Equalizer
equalizer: equalizer-10bands: 10 Band Equalizer
adpcmenc: adpcmenc: ADPCM encoder
mpeg2dec: mpeg2dec: mpeg1 and mpeg2 video decoder
compositor: compositor: Compositor
videoframe_audiolevel: videoframe-audiolevel: Video-frame audio level
subenc: srtenc: Srt encoder
subenc: webvttenc: WebVTT encoder
nvdrmvideosink: nvdrmvideosink: Nvidia Drm Video Sink
dvbsuboverlay: dvbsuboverlay: DVB Subtitles Overlay
de265: libde265dec: HEVC/H.265 decoder
videotestsrc: videotestsrc: Video test source
cluttergst3: clutterautovideosink: Generic bin
fieldanalysis: fieldanalysis: Video field analysis
taglib: id3v2mux: TagLib-based ID3v2 Muxer
taglib: apev2mux: TagLib-based APEv2 Muxer
mpg123: mpg123audiodec: mpg123 mp3 decoder
rtsp: rtspsrc: RTSP packet receiver
rtsp: rtpdec: RTP Decoder
auparse: auparse: AU audio demuxer
omx: omxmpeg4videodec: OpenMAX MPEG4 Video Decoder
omx: omxh264dec: OpenMAX H.264 Video Decoder
omx: omxh265dec: OpenMAX H.265 Video Decoder
omx: omxvp8dec: OpenMAX VP8 Video Decoder
omx: omxvp9dec: OpenMAX VP9 Video Decoder
omx: omxmpeg2videodec: OpenMAX MPEG2 Video Decoder
omx: omxwmvdec: OpenMAX WMV Video Decoder
omx: omxh264enc: OpenMAX H.264 Video Encoder
omx: omxh265enc: OpenMAX H.265 Video Encoder
omx: omxvp8enc: OpenMAX VP8 Video Encoder
omx: omxvp9enc: OpenMAX VP9 Video Encoder
omx: nvoverlaysink: OpenMax Video Sink
nvcompositor: nvcompositor: NvCompositor
x265: x265enc: x265enc
audiofxbad: audiochannelmix: Simple stereo audio mixer
twolame: twolamemp2enc: TwoLAME mp2 encoder
shapewipe: shapewipe: Shape Wipe transition filter
mpegpsdemux: mpegpsdemux: MPEG Program Stream Demuxer
nvegltransform: nvegltransform: NvEGLTransform
accurip: accurip: AccurateRip™ CRC element
shm: shmsrc: Shared Memory Source
shm: shmsink: Shared Memory Sink
festival: festival: Festival Text-to-Speech synthesizer
resindvd: rsndvdbin: rsndvdbin
gdp: gdpdepay: GDP Depayloader
gdp: gdppay: GDP Payloader
level: level: Level
asf: asfdemux: ASF Demuxer
asf: rtspwms: WMS RTSP Extension
asf: rtpasfdepay: RTP ASF packet depayloader
multipart: multipartdemux: Multipart demuxer
multipart: multipartmux: Multipart muxer
tcp: socketsrc: socket source
tcp: tcpclientsink: TCP client sink
tcp: tcpclientsrc: TCP client source
tcp: tcpserversink: TCP server sink
tcp: tcpserversrc: TCP server source
tcp: multifdsink: Multi filedescriptor sink
tcp: multisocketsink: Multi socket sink
amrnb: amrnbdec: AMR-NB audio decoder
amrnb: amrnbenc: AMR-NB audio encoder
bluez: a2dpsink: Bluetooth A2DP sink
bluez: avdtpsink: Bluetooth AVDTP sink
bluez: avdtpsrc: Bluetooth AVDTP Source
nvtee: nvtee: NvTee
audiorate: audiorate: Audio rate adjuster
soundtouch: pitch: Pitch controller
soundtouch: bpmdetect: BPM Detector
gdkpixbuf: gdkpixbufdec: GdkPixbuf image decoder
gdkpixbuf: gdkpixbufoverlay: GdkPixbuf Overlay
gdkpixbuf: gdkpixbufsink: GdkPixbuf sink
goom: goom: GOOM: what a GOOM!
smooth: smooth: Smooth effect
webp: webpdec: WebP image decoder
webp: webpenc: WEBP image encoder
dvdread: dvdreadsrc: DVD Source
webrtcdsp: webrtcdsp: Voice Processor (AGC, AEC, filters, etc.)
webrtcdsp: webrtcechoprobe: Accoustic Echo Canceller probe
opusparse: opusparse: Opus audio parser
wavparse: wavparse: WAV audio demuxer
typefindfunctions: video/x-ms-asf: asf, wm, wma, wmv
typefindfunctions: audio/x-musepack: mpc, mpp, mp+
typefindfunctions: audio/x-au: au, snd
typefindfunctions: video/x-msvideo: avi
typefindfunctions: audio/qcelp: qcp
typefindfunctions: video/x-cdxa: dat
typefindfunctions: video/x-vcd: dat
typefindfunctions: audio/x-imelody: imy, ime, imelody
typefindfunctions: audio/midi: mid, midi
typefindfunctions: audio/riff-midi: mid, midi
typefindfunctions: audio/mobile-xmf: mxmf
typefindfunctions: video/x-fli: flc, fli
typefindfunctions: application/x-id3v2: mp3, mp2, mp1, mpga, ogg, flac, tta
typefindfunctions: application/x-id3v1: mp3, mp2, mp1, mpga, ogg, flac, tta
typefindfunctions: application/x-apetag: mp3, ape, mpc, wv
typefindfunctions: audio/x-ttafile: tta
typefindfunctions: audio/x-mod: 669, amf, ams, dbm, digi, dmf, dsm, gdm, far, imf, it, j2b, mdl, med, mod, mt2, mtm, okt, psm, ptm, sam, s3m, stm, stx, ult, umx, xm
typefindfunctions: audio/mpeg: mp3, mp2, mp1, mpga
typefindfunctions: audio/x-ac3: ac3, eac3
typefindfunctions: audio/x-dts: dts
typefindfunctions: audio/x-gsm: gsm
typefindfunctions: video/mpeg-sys: mpe, mpeg, mpg
typefindfunctions: video/mpegts: ts, mts
typefindfunctions: application/ogg: ogg, oga, ogv, ogm, ogx, spx, anx, axa, axv
typefindfunctions: video/mpeg-elementary: mpv, mpeg, mpg
typefindfunctions: video/mpeg4: m4v
typefindfunctions: video/x-h263: h263, 263
typefindfunctions: video/x-h264: h264, x264, 264
typefindfunctions: video/x-h265: h265, x265, 265
typefindfunctions: video/x-nuv: nuv
typefindfunctions: audio/x-m4a: m4a
typefindfunctions: application/x-3gp: 3gp
typefindfunctions: video/quicktime: mov, mp4
typefindfunctions: image/x-quicktime: qif, qtif, qti
typefindfunctions: image/jp2: jp2
typefindfunctions: image/x-jpc: jpc, j2k
typefindfunctions: video/mj2: mj2
typefindfunctions: text/html: htm, html
typefindfunctions: application/vnd.rn-realmedia: ra, ram, rm, rmvb
typefindfunctions: application/x-pn-realaudio: ra, ram, rm, rmvb
typefindfunctions: application/x-shockwave-flash: swf, swfl
typefindfunctions: application/dash+xml: mpd, MPD
typefindfunctions: application/vnd.ms-sstr+xml: no extensions
typefindfunctions: video/x-flv: flv
typefindfunctions: text/plain: txt
typefindfunctions: text/utf-16: txt
typefindfunctions: text/utf-32: txt
typefindfunctions: text/uri-list: ram
typefindfunctions: application/itc: itc
typefindfunctions: application/x-hls: m3u8
typefindfunctions: application/sdp: sdp
typefindfunctions: application/smil: smil
typefindfunctions: application/ttml+xml: ttml+xml
typefindfunctions: application/xml: xml
typefindfunctions: audio/x-wav: wav
typefindfunctions: audio/x-aiff: aiff, aif, aifc
typefindfunctions: audio/x-svx: iff, svx
typefindfunctions: audio/x-paris: paf
typefindfunctions: audio/x-nist: nist
typefindfunctions: audio/x-voc: voc
typefindfunctions: audio/x-sds: sds
typefindfunctions: audio/x-ircam: sf
typefindfunctions: audio/x-w64: w64
typefindfunctions: audio/x-rf64: rf64
typefindfunctions: audio/x-shorten: shn
typefindfunctions: application/x-ape: ape
typefindfunctions: image/jpeg: jpg, jpe, jpeg
typefindfunctions: image/gif: gif
typefindfunctions: image/png: png
typefindfunctions: image/bmp: bmp
typefindfunctions: image/tiff: tif, tiff
typefindfunctions: image/webp: webp
typefindfunctions: image/x-exr: exr
typefindfunctions: image/x-portable-pixmap: pnm, ppm, pgm, pbm
typefindfunctions: video/x-matroska: mkv, mka, mk3d, webm
typefindfunctions: application/mxf: mxf
typefindfunctions: video/x-mve: mve
typefindfunctions: video/x-dv: dv, dif
typefindfunctions: audio/x-amr-nb-sh: amr
typefindfunctions: audio/x-amr-wb-sh: amr
typefindfunctions: audio/iLBC-sh: ilbc
typefindfunctions: audio/x-sbc: sbc
typefindfunctions: audio/x-sid: sid
typefindfunctions: image/x-xcf: xcf
typefindfunctions: video/x-mng: mng
typefindfunctions: image/x-jng: jng
typefindfunctions: image/x-xpixmap: xpm
typefindfunctions: image/x-sun-raster: ras
typefindfunctions: application/x-bzip: bz2
typefindfunctions: application/x-gzip: gz
typefindfunctions: application/zip: zip
typefindfunctions: application/x-compress: Z
typefindfunctions: subtitle/x-kate: no extensions
typefindfunctions: application/x-subtitle-vtt: vtt
typefindfunctions: audio/x-flac: flac
typefindfunctions: audio/x-vorbis: no extensions
typefindfunctions: video/x-theora: no extensions
typefindfunctions: application/x-ogm-video: no extensions
typefindfunctions: application/x-ogm-audio: no extensions
typefindfunctions: application/x-ogm-text: no extensions
typefindfunctions: audio/x-speex: no extensions
typefindfunctions: audio/x-celt: no extensions
typefindfunctions: application/x-ogg-skeleton: no extensions
typefindfunctions: text/x-cmml: no extensions
typefindfunctions: application/x-executable: no extensions
typefindfunctions: audio/aac: aac, adts, adif, loas
typefindfunctions: audio/x-spc: spc
typefindfunctions: audio/x-wavpack: wv, wvp
typefindfunctions: audio/x-wavpack-correction: wvc
typefindfunctions: audio/x-caf: caf
typefindfunctions: application/postscript: ps
typefindfunctions: image/svg+xml: svg
typefindfunctions: application/x-rar: rar
typefindfunctions: application/x-tar: tar
typefindfunctions: application/x-ar: a
typefindfunctions: application/x-ms-dos-executable: dll, exe, ocx, sys, scr, msstyles, cpl
typefindfunctions: video/x-dirac: no extensions
typefindfunctions: multipart/x-mixed-replace: no extensions
typefindfunctions: application/x-mmsh: no extensions
typefindfunctions: video/vivo: viv
typefindfunctions: audio/x-nsf: nsf
typefindfunctions: audio/x-gym: gym
typefindfunctions: audio/x-ay: ay
typefindfunctions: audio/x-gbs: gbs
typefindfunctions: audio/x-vgm: vgm
typefindfunctions: audio/x-sap: sap
typefindfunctions: video/x-ivf: ivf
typefindfunctions: audio/x-kss: kss
typefindfunctions: application/pdf: pdf
typefindfunctions: application/msword: doc
typefindfunctions: image/vnd.adobe.photoshop: psd
typefindfunctions: image/vnd.wap.wbmp: no extensions
typefindfunctions: application/x-yuv4mpeg: no extensions
typefindfunctions: image/x-icon: no extensions
typefindfunctions: image/x-degas: no extensions
typefindfunctions: application/octet-stream: no extensions
typefindfunctions: application/x-ssa: ssa, ass
typefindfunctions: video/x-pva: pva
typefindfunctions: audio/x-xi: xi
typefindfunctions: audio/audible: aa, aax
videocrop: videocrop: Crop
videocrop: aspectratiocrop: aspectratiocrop
audioparsers: aacparse: AAC audio stream parser
audioparsers: amrparse: AMR audio stream parser
audioparsers: ac3parse: AC3 audio stream parser
audioparsers: dcaparse: DTS Coherent Acoustics audio stream parser
audioparsers: flacparse: FLAC audio parser
audioparsers: mpegaudioparse: MPEG1 Audio Parser
audioparsers: sbcparse: SBC audio parser
audioparsers: wavpackparse: Wavpack audio stream parser
freeverb: freeverb: Reverberation/room effect
rtmp: rtmpsrc: RTMP Source
rtmp: rtmpsink: RTMP output sink
audiotestsrc: audiotestsrc: Audio test source
videomixer: videomixer: Video mixer 2
fbdevsink: fbdevsink: fbdev video sink
gio: giosink: GIO sink
gio: giosrc: GIO source
gio: giostreamsink: GIO stream sink
gio: giostreamsrc: GIO stream source
decklink: decklinkaudiosink: Decklink Audio Sink
decklink: decklinkvideosink: Decklink Video Sink
decklink: decklinkaudiosrc: Decklink Audio Source
decklink: decklinkvideosrc: Decklink Video Source
gaudieffects: burn: Burn
gaudieffects: chromium: Chromium
gaudieffects: dilate: Dilate
gaudieffects: dodge: Dodge
gaudieffects: exclusion: Exclusion
gaudieffects: solarize: Solarize
gaudieffects: gaussianblur: GstGaussianBlur
hls: hlsdemux: HLS Demuxer
hls: hlssink: HTTP Live Streaming sink
hls: hlssink2: HTTP Live Streaming sink
mulaw: mulawenc: Mu Law audio encoder
mulaw: mulawdec: Mu Law audio decoder
ivfparse: ivfparse: IVF parser
openglmixers: glmixerbin: OpenGL video_mixer empty bin
openglmixers: glvideomixer: OpenGL video_mixer bin
openglmixers: glvideomixerelement: OpenGL video_mixer
openglmixers: glstereomix: OpenGL stereo video combiner
lame: lamemp3enc: L.A.M.E. mp3 encoder
geometrictransform: circle: circle
geometrictransform: diffuse: diffuse
geometrictransform: kaleidoscope: kaleidoscope
geometrictransform: marble: marble
geometrictransform: pinch: pinch
geometrictransform: rotate: rotate
geometrictransform: sphere: sphere
geometrictransform: twirl: twirl
geometrictransform: waterripple: waterripple
geometrictransform: stretch: stretch
geometrictransform: bulge: bulge
geometrictransform: tunnel: tunnel
geometrictransform: square: square
geometrictransform: mirror: mirror
geometrictransform: fisheye: fisheye
geometrictransform: perspective: perspective
navigationtest: navigationtest: Video navigation test
mpegtsmux: mpegtsmux: MPEG Transport Stream Muxer
sbc: sbcdec: Bluetooth SBC audio decoder
sbc: sbcenc: Bluetooth SBC audio encoder
siren: sirendec: Siren Decoder element
siren: sirenenc: Siren Encoder element
netsim: netsim: Network Simulator
id3demux: id3demux: ID3 tag demuxer
mms: mmssrc: MMS streaming source
vcdsrc: vcdsrc: VCD Source
aasink: aasink: ASCII art video sink
cacasink: cacasink: A colored ASCII art video sink
inter: interaudiosrc: Internal audio source
inter: interaudiosink: Internal audio sink
inter: intersubsrc: Internal subtitle source
inter: intersubsink: Internal subtitle sink
inter: intervideosrc: Internal video source
inter: intervideosink: Internal video sink
pango: textoverlay: Text overlay
pango: timeoverlay: Time overlay
pango: clockoverlay: Clock overlay
pango: textrender: Text renderer
colormanagement: lcms: LCMS2 ICC correction
ttmlsubs: ttmlparse: TTML subtitle parser
ttmlsubs: ttmlrender: TTML subtitle renderer
nvv4l2camerasrc: nvv4l2camerasrc: NvV4l2CameraSrc
audiovisualizers: spacescope: Stereo visualizer
audiovisualizers: spectrascope: Frequency spectrum scope
audiovisualizers: synaescope: Synaescope
audiovisualizers: wavescope: Waveform oscilloscope
nveglstreamsrc: nveglstreamsrc: nVidia EGL Stream
ivtc: ivtc: Inverse Telecine
ivtc: combdetect: Comb Detect
waylandsink: waylandsink: wayland video sink
audiomixmatrix: audiomixmatrix: Matrix audio mix
rtp: rtpac3depay: RTP AC3 depayloader
rtp: rtpac3pay: RTP AC3 audio payloader
rtp: rtpbvdepay: RTP BroadcomVoice depayloader
rtp: rtpbvpay: RTP BV Payloader
rtp: rtpceltdepay: RTP CELT depayloader
rtp: rtpceltpay: RTP CELT payloader
rtp: rtpdvdepay: RTP DV Depayloader
rtp: rtpdvpay: RTP DV Payloader
rtp: rtpgstdepay: GStreamer depayloader
rtp: rtpgstpay: RTP GStreamer payloader
rtp: rtpilbcpay: RTP iLBC Payloader
rtp: rtpilbcdepay: RTP iLBC depayloader
rtp: rtpg722depay: RTP audio depayloader
rtp: rtpg722pay: RTP audio payloader
rtp: rtpg723depay: RTP G.723 depayloader
rtp: rtpg723pay: RTP G.723 payloader
rtp: rtpg726depay: RTP G.726 depayloader
rtp: rtpg726pay: RTP G.726 payloader
rtp: rtpg729depay: RTP G.729 depayloader
rtp: rtpg729pay: RTP G.729 payloader
rtp: rtpgsmdepay: RTP GSM depayloader
rtp: rtpgsmpay: RTP GSM payloader
rtp: rtpamrdepay: RTP AMR depayloader
rtp: rtpamrpay: RTP AMR payloader
rtp: rtppcmadepay: RTP PCMA depayloader
rtp: rtppcmudepay: RTP PCMU depayloader
rtp: rtppcmupay: RTP PCMU payloader
rtp: rtppcmapay: RTP PCMA payloader
rtp: rtpmpadepay: RTP MPEG audio depayloader
rtp: rtpmpapay: RTP MPEG audio payloader
rtp: rtpmparobustdepay: RTP MPEG audio depayloader
rtp: rtpmpvdepay: RTP MPEG video depayloader
rtp: rtpmpvpay: RTP MPEG2 ES video payloader
rtp: rtpopusdepay: RTP Opus packet depayloader
rtp: rtpopuspay: RTP Opus payloader
rtp: rtph261pay: RTP H261 packet payloader
rtp: rtph261depay: RTP H261 depayloader
rtp: rtph263ppay: RTP H263 payloader
rtp: rtph263pdepay: RTP H263 depayloader
rtp: rtph263depay: RTP H263 depayloader
rtp: rtph263pay: RTP H263 packet payloader
rtp: rtph264depay: RTP H264 depayloader
rtp: rtph264pay: RTP H264 payloader
rtp: rtph265depay: RTP H265 depayloader
rtp: rtph265pay: RTP H265 payloader
rtp: rtpj2kdepay: RTP JPEG 2000 depayloader
rtp: rtpj2kpay: RTP JPEG 2000 payloader
rtp: rtpjpegdepay: RTP JPEG depayloader
rtp: rtpjpegpay: RTP JPEG payloader
rtp: rtpklvdepay: RTP KLV Depayloader
rtp: rtpklvpay: RTP KLV Payloader
rtp: rtpL8pay: RTP audio payloader
rtp: rtpL8depay: RTP audio depayloader
rtp: rtpL16pay: RTP audio payloader
rtp: rtpL16depay: RTP audio depayloader
rtp: rtpL24pay: RTP audio payloader
rtp: rtpL24depay: RTP audio depayloader
rtp: asteriskh263: RTP Asterisk H263 depayloader
rtp: rtpmp1sdepay: RTP MPEG1 System Stream depayloader
rtp: rtpmp2tdepay: RTP MPEG Transport Stream depayloader
rtp: rtpmp2tpay: RTP MPEG2 Transport Stream payloader
rtp: rtpmp4vpay: RTP MPEG4 Video payloader
rtp: rtpmp4vdepay: RTP MPEG4 video depayloader
rtp: rtpmp4apay: RTP MPEG4 audio payloader
rtp: rtpmp4adepay: RTP MPEG4 audio depayloader
rtp: rtpmp4gdepay: RTP MPEG4 ES depayloader
rtp: rtpmp4gpay: RTP MPEG4 ES payloader
rtp: rtpqcelpdepay: RTP QCELP depayloader
rtp: rtpqdm2depay: RTP QDM2 depayloader
rtp: rtpsbcdepay: RTP SBC audio depayloader
rtp: rtpsbcpay: RTP packet payloader
rtp: rtpsirenpay: RTP Payloader for Siren Audio
rtp: rtpsirendepay: RTP Siren packet depayloader
rtp: rtpspeexpay: RTP Speex payloader
rtp: rtpspeexdepay: RTP Speex depayloader
rtp: rtpsv3vdepay: RTP SVQ3 depayloader
rtp: rtptheoradepay: RTP Theora depayloader
rtp: rtptheorapay: RTP Theora payloader
rtp: rtpvorbisdepay: RTP Vorbis depayloader
rtp: rtpvorbispay: RTP Vorbis payloader
rtp: rtpvp8depay: RTP VP8 depayloader
rtp: rtpvp8pay: RTP VP8 payloader
rtp: rtpvp9depay: RTP VP9 depayloader
rtp: rtpvp9pay: RTP VP9 payloader
rtp: rtpvrawdepay: RTP Raw Video depayloader
rtp: rtpvrawpay: RTP Raw Video payloader
rtp: rtpstreampay: RTP Stream Payloading
rtp: rtpstreamdepay: RTP Stream Depayloading
rtp: rtpredenc: Redundant Audio Data (RED) Encoder
rtp: rtpreddec: Redundant Audio Data (RED) Decoder
rtp: rtpulpfecdec: RTP FEC Decoder
rtp: rtpulpfecenc: RTP FEC Encoder
rtp: rtpstorage: RTP storage
adpcmdec: adpcmdec: ADPCM decoder
faceoverlay: faceoverlay: faceoverlay
mxf: mxfdemux: MXF Demuxer
mxf: mxfmux: MXF muxer
bz2: bz2enc: BZ2 encoder
bz2: bz2dec: BZ2 decoder
deinterlace: deinterlace: Deinterlacer
dtsdec: dtsdec: DTS audio decoder
soup: souphttpsrc: HTTP client source
soup: souphttpclientsink: HTTP client sink
jp2kdecimator: jp2kdecimator: JPEG2000 decimator
imagefreeze: imagefreeze: Still frame stream generator
subparse: subparse_typefind: srt, sub, mpsub, mdvd, smi, txt, dks, vtt
subparse: subparse: Subtitle parser
subparse: ssaparse: SSA Subtitle Parser
faad: faad: AAC audio decoder
srtp: srtpenc: SRTP encoder
srtp: srtpdec: SRTP decoder
video4linux2: v4l2src: Video (video4linux2) Source
video4linux2: v4l2sink: Video (video4linux2) Sink
video4linux2: v4l2radio: Radio (video4linux2) Tuner
video4linux2: v4l2deviceprovider (GstDeviceProviderFactory)
wavenc: wavenc: WAV audio muxer
proxy: proxysrc: Proxy source
proxy: proxysink: Proxy Sink
segmentclip: audiosegmentclip: Audio buffer segment clipper
segmentclip: videosegmentclip: Video buffer segment clipper
a52dec: a52dec: ATSC A/52 audio decoder
coretracers: latency (GstTracerFactory)
coretracers: log (GstTracerFactory)
coretracers: rusage (GstTracerFactory)
coretracers: stats (GstTracerFactory)
coretracers: leaks (GstTracerFactory)
vpx: vp8dec: On2 VP8 Decoder
vpx: vp8enc: On2 VP8 Encoder
vpx: vp9dec: On2 VP9 Decoder
vpx: vp9enc: On2 VP9 Encoder
x264: x264enc: x264enc
realmedia: rmdemux: RealMedia Demuxer
realmedia: rademux: RealAudio Demuxer
realmedia: rdtdepay: RDT packet parser
realmedia: rdtmanager: RTP Decoder
realmedia: rtspreal: RealMedia RTSP Extension
realmedia: pnmsrc: PNM packet receiver
dtmf: dtmfsrc: DTMF tone generator
dtmf: rtpdtmfsrc: RTP DTMF packet generator
dtmf: rtpdtmfdepay: RTP DTMF packet depayloader
mpeg2enc: mpeg2enc: mpeg2enc video encoder
mpegpsmux: mpegpsmux: MPEG Program Stream Muxer
voamrwbenc: voamrwbenc: AMR-WB audio encoder
nvvideocuda: videocuda: CUDA Post processor
replaygain: rganalysis: ReplayGain analysis
replaygain: rglimiter: ReplayGain limiter
replaygain: rgvolume: ReplayGain volume
sdpelem: sdpdemux: SDP session setup
sdpelem: sdpsrc: SDP Source
curl: curlhttpsink: Curl http sink
curl: curlfilesink: Curl file sink
curl: curlftpsink: Curl ftp sink
curl: curlsmtpsink: Curl smtp sink
curl: curlhttpsrc: HTTP Client Source using libcURL
nvvideo4linux2: nvv4l2decoder: NVIDIA v4l2 video decoder
nvvideo4linux2: nvv4l2h264enc: V4L2 H.264 Encoder
nvvideo4linux2: nvv4l2h265enc: V4L2 H.265 Encoder
nvvideo4linux2: nvv4l2vp8enc: V4L2 VP8 Encoder
nvvideo4linux2: nvv4l2vp9enc: V4L2 VP9 Encoder
spectrum: spectrum: Spectrum analyzer
nveglglessink: nveglglessink: EGL/GLES vout Sink
dashdemux: dashdemux: DASH Demuxer
rtpmanager: rtpbin: RTP Bin
rtpmanager: rtpjitterbuffer: RTP packet jitter-buffer
rtpmanager: rtpptdemux: RTP Demux
rtpmanager: rtpsession: RTP Session
rtpmanager: rtprtxqueue: RTP Retransmission Queue
rtpmanager: rtprtxreceive: RTP Retransmission receiver
rtpmanager: rtprtxsend: RTP Retransmission Sender
rtpmanager: rtpssrcdemux: RTP SSRC Demux
rtpmanager: rtpmux: RTP muxer
rtpmanager: rtpdtmfmux: RTP muxer
wavpack: wavpackdec: Wavpack audio decoder
wavpack: wavpackenc: Wavpack audio encoder
timecode: timecodestamper: Timecode stamper
timecode: avwait: Timecode Wait
cdio: cdiocddasrc: CD audio source (CDDA)
y4menc: y4menc: YUV4MPEG video encoder
dc1394: dc1394src: 1394 IIDC Video Source
gtk: gtksink: Gtk Video Sink
gtk: gtkglsink: Gtk GL Video Sink
jack: jackaudiosrc: Audio Source (Jack)
jack: jackaudiosink: Audio Sink (Jack)
assrender: assrender: ASS/SSA Render
speed: speed: Speed
speex: speexenc: Speex audio encoder
speex: speexdec: Speex audio decoder
removesilence: removesilence: RemoveSilence
xvimagesink: xvimagesink: Video sink
mplex: mplex: mplex video multiplexer
videoconvert: videoconvert: Colorspace converter
nvdsgst_multistreamtiler: nvmultistreamtiler: Stream Tiler DS
nvdsgst_dewarper: nvdewarper: nvdewarper
nvdsgst_videotemplate: nvdsvideotemplate: NvDsVideoTemplate plugin for Transform/In-Place use-cases
nvdsgst_logger: nvdslogger: Nvdslogger
nvdsgst_segvisual: nvsegvisual: nvsegvisual
nvdsgst_of: nvof: nvof
nvdsgst_audiotemplate: nvdsaudiotemplate: DS AUDIO template Plugin for Transform IP use-cases
nvdsgst_tracker: nvtracker: NvTracker plugin
nvdsgst_dsexample: dsexample: DsExample plugin
nvdsgst_ofvisual: nvofvisual: nvofvisual
nvdsgst_multistream: nvstreammux: Stream multiplexer
nvdsgst_multistream: nvstreamdemux: Stream demultiplexer
nvdsgst_infer: nvinfer: NvInfer plugin
nvdsgst_preprocess: nvdspreprocess: gst-nvdspreprocess plugin
nvdsgst_msgbroker: nvmsgbroker: Message Broker
nvdsgst_dsanalytics: nvdsanalytics: DsAnalytics plugin
nvvideoconvert: nvvideoconvert: NvVidConv Plugin
nvdsgst_deepstream_bins: nvinferbin: NvInfer Bin
nvdsgst_deepstream_bins: nvinferserverbin: NvInferServer Bin
nvdsgst_deepstream_bins: nvosdbin: NvOsd Bin
nvdsgst_deepstream_bins: nvdewarperbin: NvDewarper Bin
nvdsgst_deepstream_bins: nvtilerbin: NvTiler Bin
nvdsgst_deepstream_bins: nvtrackerbin: NvTracker Bin
nvdsgst_deepstream_bins: nvurisrcbin: NvUriSrc Bin
nvdsgst_deepstream_bins: nvcamerasrcbin: NvCameraSrc Bin
nvdsgst_deepstream_bins: nvanalyticsbin: NvAnalytics Bin
nvdsgst_deepstream_bins: nvvideorenderersinkbin: NvVideoRenderer Bin
nvdsgst_deepstream_bins: nvvideoencfilesinkbin: NvVideoEncFilesink Bin
nvdsgst_deepstream_bins: nvrtspoutsinkbin: NvRtspOut Bin
nvdsgst_deepstream_bins: nvmsgbrokersinkbin: NvMsgBroker Bin
nvdsgst_deepstream_bins: nvdsbuffersyncbin: NvBufferSync Bin
nvdsgst_inferaudio: nvinferaudio: NvInfer Audio plugin
nvdsgst_osd: nvdsosd: NvDsOsd plugin
nvdsgst_msgconv: nvmsgconv: Message Converter
nvvidconv: nvvidconv: NvVidConv Plugin
dtls: dtlsenc: DTLS Encoder
dtls: dtlsdec: DTLS Decoder
dtls: dtlssrtpdec: DTLS-SRTP Decoder
dtls: dtlssrtpenc: DTLS-SRTP Encoder
dtls: dtlssrtpdemux: DTLS SRTP Demultiplexer
ximagesrc: ximagesrc: Ximage video source
gsm: gsmenc: GSM audio encoder
gsm: gsmdec: GSM audio decoder
id3tag: id3mux: ID3 v1 and v2 Muxer
opengl: glimagesink: GL Sink Bin
opengl: glimagesinkelement: OpenGL video sink
opengl: glupload: OpenGL uploader
opengl: gldownload: OpenGL downloader
opengl: glcolorconvert: OpenGL color converter
opengl: glcolorbalance: Video balance
opengl: glfilterbin: GL Filter Bin
opengl: glsinkbin: GL Sink Bin
opengl: glsrcbin: GL Src Bin
opengl: glfiltercube: OpenGL cube filter
opengl: gltransformation: OpenGL transformation filter
opengl: glvideoflip: OpenGL video flip filter
opengl: gleffects: Gstreamer OpenGL Effects
opengl: gleffects_identity: Do nothing Effect
opengl: gleffects_mirror: Mirror Effect
opengl: gleffects_squeeze: Squeeze Effect
opengl: gleffects_stretch: Stretch Effect
opengl: gleffects_tunnel: Light Tunnel Effect
opengl: gleffects_fisheye: FishEye Effect
opengl: gleffects_twirl: Twirl Effect
opengl: gleffects_bulge: Bulge Effect
opengl: gleffects_square: Square Effect
opengl: gleffects_heat: Heat Signature Effect
opengl: gleffects_sepia: Sepia Toning Effect
opengl: gleffects_xpro: Cross Processing Effect
opengl: gleffects_lumaxpro: Luma Cross Processing Effect
opengl: gleffects_xray: Glowing negative effect
opengl: gleffects_sin: All Grey but Red Effect
opengl: gleffects_glow: Glow Lighting Effect
opengl: gleffects_sobel: Sobel edge detection Effect
opengl: gleffects_blur: Blur with 9x9 separable convolution Effect
opengl: gleffects_laplacian: Laplacian Convolution Demo Effect
opengl: glcolorscale: OpenGL color scale
opengl: glshader: OpenGL fragment shader filter
opengl: glfilterapp: OpenGL application filter
opengl: glviewconvert: OpenGL Multiview/3D conversion filter
opengl: glstereosplit: GLStereoSplit
opengl: gltestsrc: Video test source
opengl: gldeinterlace: OpenGL deinterlacing filter
opengl: gloverlay: Gstreamer OpenGL Overlay
mpegtsdemux: tsparse: MPEG transport stream parser
mpegtsdemux: tsdemux: MPEG transport stream demuxer
bs2b: bs2b: Crossfeed effect
vulkan: vulkansink: Vulkan video sink
vulkan: vulkanupload: Vulkan Uploader
nvvideosinks: nv3dsink: Nvidia 3D sink
spandsp: spanplc: SpanDSP PLC
spandsp: dtmfdetect: DTMF detector element
spandsp: tonegeneratesrc: Telephony Tone Generator source
png: pngdec: PNG image decoder
png: pngenc: PNG image encoder
openmpt: openmptdec: OpenMPT-based module music decoder
nvjpeg: nvjpegenc: JPEG image encoder
nvjpeg: nvjpegdec: JPEG image decoder
alphacolor: alphacolor: Alpha color filter
voaacenc: voaacenc: AAC audio encoder
dvdspu: dvdspu: Sub-picture Overlay
1394: dv1394src: Firewire (1394) DV video source
1394: hdv1394src: Firewire (1394) HDV video source
alpha: alpha: Alpha filter
goom2k1: goom2k1: GOOM: what a GOOM! 2k1 edition
alsa: alsasrc: Audio source (ALSA)
alsa: alsasink: Audio sink (ALSA)
alsa: alsamidisrc: AlsaMidi Source
y4mdec: y4mdec: YUV4MPEG demuxer/decoder
videoscale: videoscale: Video scaler
dv: dvdemux: DV system stream demuxer
dv: dvdec: DV video decoder
udp: udpsink: UDP packet sender
udp: multiudpsink: UDP packet sender
udp: dynudpsink: UDP packet sender
udp: udpsrc: UDP packet receiver
audioconvert: audioconvert: Audio converter
videosignal: videoanalyse: Video analyser
videosignal: simplevideomarkdetect: Video detecter
videosignal: simplevideomark: Video marker
adder: adder: Adder
nvarguscamerasrc: nvarguscamerasrc: NvArgusCameraSrc
jpegformat: jpegparse: JPEG stream parser
jpegformat: jifmux: JPEG stream muxer
debugutilsbad: checksumsink: Checksum sink
debugutilsbad: fpsdisplaysink: Measure and show framerate on videosink
debugutilsbad: chopmydata: FIXME
debugutilsbad: compare: Compare buffers
debugutilsbad: debugspy: DebugSpy
debugutilsbad: watchdog: Watchdog
debugutilsbad: errorignore: Convert some GstFlowReturn types into others
debugutilsbad: fakevideosink: Fake Video Sink
dvdlpcmdec: dvdlpcmdec: DVD LPCM Audio decoder
asfmux: asfmux: ASF muxer
asfmux: rtpasfpay: RTP ASF payloader
asfmux: asfparse: ASF parser
videofilter: gamma: Video gamma correction
videofilter: videobalance: Video balance
videofilter: videoflip: Video flipper
videofilter: videomedian: Median effect
shout2: shout2send: Icecast network sink
videorate: videorate: Video rate adjuster
flac: flacenc: FLAC audio encoder
flac: flacdec: FLAC audio decoder
flac: flactag: FLAC tagger
apetag: apedemux: APE tag demuxer
rawparse: unalignedaudioparse: unalignedaudioparse
rawparse: unalignedvideoparse: unalignedvideoparse
rawparse: rawaudioparse: rawaudioparse
rawparse: rawvideoparse: rawvideoparse
avi: avidemux: Avi demuxer
avi: avimux: Avi muxer
avi: avisubtitle: Avi subtitle parser
openal: openalsink: OpenAL Audio Sink
openal: openalsrc: OpenAL Audio Source
zbar: zbar: Barcode detector
sid: siddec: Sid decoder
cdparanoia: cdparanoiasrc: CD Audio (cdda) Source, Paranoia IV
monoscope: monoscope: Monoscope
openexr: openexrdec: OpenEXR decoder
pulseaudio: pulsesink: PulseAudio Audio Sink
pulseaudio: pulsesrc: PulseAudio Audio Source
pulseaudio: pulsedeviceprovider (GstDeviceProviderFactory)
audiofx: audiopanorama: Stereo positioning
audiofx: audioinvert: Audio inversion
audiofx: audiokaraoke: AudioKaraoke
audiofx: audioamplify: Audio amplifier
audiofx: audiodynamic: Dynamic range controller
audiofx: audiocheblimit: Low pass & high pass filter
audiofx: audiochebband: Band pass & band reject filter
audiofx: audioiirfilter: Audio IIR filter
audiofx: audiowsinclimit: Low pass & high pass filter
audiofx: audiowsincband: Band pass & band reject filter
audiofx: audiofirfilter: Audio FIR filter
audiofx: audioecho: Audio echo
audiofx: scaletempo: Scaletempo
audiolatency: audiolatency: AudioLatency
dvdsub: dvdsubdec: DVD subtitle decoder
dvdsub: dvdsubparse: DVD subtitle parser
theora: theoradec: Theora video decoder
theora: theoraenc: Theora video encoder
theora: theoraparse: Theora video parser
interlace: interlace: Interlace filter
smpte: smpte: SMPTE transitions
smpte: smptealpha: SMPTE transitions
xingmux: xingmux: MP3 Xing muxer
pnm: pnmdec: PNM image decoder
pnm: pnmenc: PNM image encoder
wildmidi: wildmididec: WildMidi-based MIDI music decoder
ximagesink: ximagesink: Video sink
ofa: ofa: OFA
legacyrawparse: videoparse: Video Parse
legacyrawparse: audioparse: Audio Parse
kms: kmssink: KMS video sink
smoothstreaming: mssdemux: Smooth Streaming demuxer
yadif: yadif: YADIF deinterlacer
flite: flitetestsrc: Flite speech test source
matroska: matroskademux: Matroska demuxer
matroska: matroskaparse: Matroska parser
matroska: matroskamux: Matroska muxer
matroska: webmmux: WebM muxer
effectv: edgetv: EdgeTV effect
effectv: agingtv: AgingTV effect
effectv: dicetv: DiceTV effect
effectv: warptv: WarpTV effect
effectv: shagadelictv: ShagadelicTV
effectv: vertigotv: VertigoTV effect
effectv: revtv: RevTV effect
effectv: quarktv: QuarkTV effect
effectv: optv: OpTV effect
effectv: radioactv: RadioacTV effect
effectv: streaktv: StreakTV effect
effectv: rippletv: RippleTV effect
audioresample: audioresample: Audio resampler
midi: midiparse: MidiParse
interleave: interleave: Audio interleaver
interleave: deinterleave: Audio deinterleaver
rtponvif: rtponviftimestamp: ONVIF NTP timestamps RTP extension
rtponvif: rtponvifparse: ONVIF NTP timestamps RTP extension
vorbis: vorbisenc: Vorbis audio encoder
vorbis: vorbisdec: Vorbis audio decoder
vorbis: vorbisparse: VorbisParse
vorbis: vorbistag: VorbisTag
dvb: dvbsrc: DVB Source
dvb: dvbbasebin: DVB bin
icydemux: icydemux: ICY tag demuxer
autodetect: autovideosink: Auto video sink
autodetect: autovideosrc: Auto video source
autodetect: autoaudiosink: Auto audio sink
autodetect: autoaudiosrc: Auto audio source
nvivafilter: nvivafilter: NvIVAFilter Plugin
camerabin: viewfinderbin: Viewfinder Bin
camerabin: wrappercamerabinsrc: Wrapper camera src element for camerabin2
camerabin: camerabin: Camera Bin
uvch264: uvch264mjpgdemux: UVC H264 MJPG Demuxer
uvch264: uvch264src: UVC H264 Source
vmnc: vmncdec: VMnc video decoder
coreelements: capsfilter: CapsFilter
coreelements: concat: Concat
coreelements: dataurisrc: data: URI source element
coreelements: downloadbuffer: DownloadBuffer
coreelements: fakesrc: Fake Source
coreelements: fakesink: Fake Sink
coreelements: fdsrc: Filedescriptor Source
coreelements: fdsink: Filedescriptor Sink
coreelements: filesrc: File Source
coreelements: funnel: Funnel pipe fitting
coreelements: identity: Identity
coreelements: input-selector: Input selector
coreelements: output-selector: Output selector
coreelements: queue: Queue
coreelements: queue2: Queue 2
coreelements: filesink: File Sink
coreelements: tee: Tee pipe fitting
coreelements: typefind: TypeFind
coreelements: multiqueue: MultiQueue
coreelements: valve: Valve element
coreelements: streamiddemux: Streamid Demux
modplug: modplug: ModPlug
playback: playbin: Player Bin 2
playback: playbin3: Player Bin 3
playback: playsink: Player Sink
playback: subtitleoverlay: Subtitle Overlay
playback: streamsynchronizer: Stream Synchronizer
playback: decodebin: Decoder Bin
playback: decodebin3: Decoder Bin 3
playback: uridecodebin: URI Decoder
playback: uridecodebin3: URI Decoder
playback: urisourcebin: URI reader
playback: parsebin: Parse Bin
videofiltersbad: scenechange: Scene change detector
videofiltersbad: zebrastripe: Zebra stripe overlay
videofiltersbad: videodiff: Video Diff
coloreffects: coloreffects: Color Look-up Table filter
coloreffects: chromahold: Chroma hold filter
bayer: bayer2rgb: Bayer to RGB decoder for cameras
bayer: rgb2bayer: RGB to Bayer converter
oss4: oss4sink: OSS v4 Audio Sink
oss4: oss4src: OSS v4 Audio Source
flxdec: flxdec: FLX video decoder
autoconvert: autoconvert: Select convertor based on caps
autoconvert: autovideoconvert: Select color space convertor based on caps
opus: opusenc: Opus audio encoder
opus: opusdec: Opus audio decoder
ogg: oggdemux: Ogg demuxer
ogg: oggmux: Ogg muxer
ogg: ogmaudioparse: OGM audio stream parser
ogg: ogmvideoparse: OGM video stream parser
ogg: ogmtextparse: OGM text stream parser
ogg: oggparse: Ogg parser
ogg: oggaviparse: Ogg AVI parser
rsvg: rsvgoverlay: RSVG overlay
rsvg: rsvgdec: SVG image decoder
isomp4: qtdemux: QuickTime demuxer
isomp4: rtpxqtdepay: RTP packet depayloader
isomp4: qtmux: QuickTime Muxer
isomp4: mp4mux: MP4 Muxer
isomp4: ismlmux: ISML Muxer
isomp4: 3gppmux: 3GPP Muxer
isomp4: mj2mux: MJ2 Muxer
isomp4: qtmoovrecover: QT Moov Recover
nvvideosink: nvvideosink: nVidia Video Sink
ipcpipeline: ipcpipelinesrc: Inter-process Pipeline Source
ipcpipeline: ipcpipelinesink: Inter-process Pipeline Sink
ipcpipeline: ipcslavepipeline: Inter-process slave pipeline
debug: breakmydata: Break my data
debug: capssetter: CapsSetter
debug: rndbuffersize: Random buffer size
debug: navseek: Seek based on left-right arrows
debug: pushfilesrc: Push File Source
debug: progressreport: Progress report
debug: taginject: TagInject
debug: testsink: Test plugin
debug: cpureport: CPU report
audiomixer: audiomixer: AudioMixer
audiomixer: liveadder: AudioMixer
audiomixer: audiointerleave: AudioInterleave
aiff: aiffparse: AIFF audio demuxer
aiff: aiffmux: AIFF audio muxer
kate: katedec: Kate stream text decoder
kate: kateenc: Kate stream encoder
kate: kateparse: Kate stream parser
kate: katetag: Kate stream tagger
gme: gmedec: Gaming console music file decoder
fluidsynthmidi: fluiddec: Fluidsynth
sndfile: sfdec: Sndfile decoder
alaw: alawenc: A Law audio encoder
alaw: alawdec: A Law audio decoder
videoparsersbad: h263parse: H.263 parser
videoparsersbad: h264parse: H.264 parser
videoparsersbad: diracparse: Dirac parser
videoparsersbad: mpegvideoparse: MPEG video elementary stream parser
videoparsersbad: mpeg4videoparse: MPEG 4 video elementary stream parser
videoparsersbad: pngparse: PNG parser
videoparsersbad: jpeg2000parse: JPEG 2000 parser
videoparsersbad: h265parse: H.265 parser
videoparsersbad: vc1parse: VC1 parser
jpeg: jpegenc: JPEG image encoder
jpeg: jpegdec: JPEG image decoder
webrtc: webrtcbin: WebRTC Bin
musepack: musepackdec: Musepack decoder
cairo: cairooverlay: Cairo overlay
cutter: cutter: Audio cutter
stereo: stereo: Stereo effect
ossaudio: osssrc: Audio Source (OSS)
ossaudio: osssink: Audio Sink (OSS)
rfbsrc: rfbsrc: Rfb source
app: appsrc: AppSrc
app: appsink: AppSink
audiobuffersplit: audiobuffersplit: Audio Buffer Split
teletext: teletextdec: Teletext decoder
openjpeg: openjpegdec: OpenJPEG JPEG2000 decoder
openjpeg: openjpegenc: OpenJPEG JPEG2000 encoder
pcapparse: pcapparse: PCapParse
pcapparse: irtspparse: IRTSPParse
videobox: videobox: Video box filter
volume: volume: Volume
staticelements: bin: Generic bin
staticelements: pipeline: Pipeline object

sudo apt-get install gstreamer1.0-libav
[sudo] password for henk:
Reading package lists… Done
Building dependency tree
Reading state information… Done
gstreamer1.0-libav is already the newest version (1.14.5-0ubuntu1~18.04.1).
The following packages were automatically installed and are no longer required:
apt-clone archdetect-deb bogl-bterm busybox-static cryptsetup-bin dpkg-repack gir1.2-timezonemap-1.0 gir1.2-xkl-1.0 grub-common kde-window-manager kinit kio kpackagetool5 kwayland-data kwin-common
kwin-data kwin-x11 libdebian-installer4 libkdecorations2-5v5 libkdecorations2private5v5 libkf5activities5 libkf5attica5 libkf5completion-data libkf5completion5 libkf5declarative-data
libkf5declarative5 libkf5doctools5 libkf5globalaccel-data libkf5globalaccel5 libkf5globalaccelprivate5 libkf5idletime5 libkf5jobwidgets-data libkf5jobwidgets5 libkf5kcmutils-data libkf5kcmutils5
libkf5kiocore5 libkf5kiontlm5 libkf5kiowidgets5 libkf5newstuff-data libkf5newstuff5 libkf5newstuffcore5 libkf5package-data libkf5package5 libkf5plasma5 libkf5quickaddons5 libkf5solid5
libkf5solid5-data libkf5sonnet5-data libkf5sonnetcore5 libkf5sonnetui5 libkf5textwidgets-data libkf5textwidgets5 libkf5waylandclient5 libkf5waylandserver5 libkf5xmlgui-bin libkf5xmlgui-data
libkf5xmlgui5 libkscreenlocker5 libkwin4-effect-builtins1 libkwineffects11 libkwinglutils11 libkwinxrenderutils11 libqgsttools-p1 libqt5designer5 libqt5help5 libqt5multimedia5
libqt5multimedia5-plugins libqt5multimediaquick-p5 libqt5multimediawidgets5 libqt5opengl5 libqt5quickwidgets5 libqt5sql5 libqt5test5 libxcb-composite0 libxcb-cursor0 libxcb-damage0 os-prober
python3-dbus.mainloop.pyqt5 python3-icu python3-pam python3-pyqt5 python3-pyqt5.qtsvg python3-pyqt5.qtwebkit qml-module-org-kde-kquickcontrolsaddons qml-module-qtmultimedia qml-module-qtquick2 rdate
tasksel tasksel-data
Use ‘sudo apt autoremove’ to remove them.
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.

I don’t see how reflashing the system will help as we just did that. The same with clearning the cache. Help would be much appreciated.

avenc_mpeg4 plugin resolved. there seems to be a clash between no-machine which uses a plugin by the libav name. By flashing and not installing no-machine, and then proceeding with the process to install all the gstreamer plugins I now have the full libav plugin available.

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