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• ffmpeg.exe not detecting UScreenCapture

  14 janvier 2021, par TenG

  I have two version of ffmpeg on the Windows 7 PC.

  


  The first came installed with an application, which uses ffmpeg to capture video/audio of the desktop. This works.

  


  It uses an older version of ffmpeg, so I downloaded the latest version and tried the same command and it reports that the devices are not detected.

  


  Commands run :

  


  Old FFMPEG :

  


  ffmpeg.exe -list_devices true -f dshow -i dummy

  


  ffmpeg version N-70358-g047fd98 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-f
rei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --ena
ble-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-
amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-li
btheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --e
nable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklin
k --enable-zlib
  libavutil      54. 19.100 / 54. 19.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 23.106 / 56. 23.106
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 11.102 /  5. 11.102
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[dshow @ 04a8a500] DirectShow video devices (some may be both video and audio devices)
[dshow @ 04a8a500]  "VF0700 Live! Cam Chat HD"
[dshow @ 04a8a500]     Alternative name "@device_pnp_\\?\usb#vid_041e&pid_4088&mi_00#7&b015b04&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c
9223196}\global"
[dshow @ 04a8a500]  "UScreenCapture"
[dshow @ 04a8a500]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\UScreenCapture"
[dshow @ 04a8a500]  "screen-capture-recorder"
[dshow @ 04a8a500]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{4EA6930A-2C8A-4AE6-A561-56E4B5044439}"
[dshow @ 04a8a500] DirectShow audio devices
[dshow @ 04a8a500]  "Microphone (VF0700 Live! Cam Ch"
[dshow @ 04a8a500]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (VF0700 Live! Cam Ch"
[dshow @ 04a8a500]  "virtual-audio-capturer"
[dshow @ 04a8a500]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E14549B-DB61-4309-AFA1-3578E927E935}"
dummy: Immediate exit requested


  


  New FFMPEG :

  


  ffmpeg version N-100616-gca21cb1e36 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 9.3-win32 (GCC) 20200320
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --a
rch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv
--enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-open
cl --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-li
bdavs2 --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-li
bopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --en
able-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-
libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-li
bxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 63.100 / 56. 63.100
  libavcodec     58.116.100 / 58.116.100
  libavformat    58. 65.101 / 58. 65.101
  libavdevice    58. 11.103 / 58. 11.103
  libavfilter     7. 95.100 /  7. 95.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
[dshow @ 000000000052cc00] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000000000052cc00]  "VF0700 Live! Cam Chat HD"
[dshow @ 000000000052cc00]     Alternative name "@device_pnp_\\?\usb#vid_041e&pid_4088&mi_00#7&b015b04&0&0000#{65e8773d-8f56-11d0-a3
b9-00a0c9223196}\global"
[dshow @ 000000000052cc00] DirectShow audio devices
[dshow @ 000000000052cc00]  "Microphone (VF0700 Live! Cam Ch"
[dshow @ 000000000052cc00]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (VF0700 Live! Cam Ch"
dummy: Immediate exit requested


  


  The new version is not detecting the following :

  


  [dshow @ 04a8a500]  "UScreenCapture"
[dshow @ 04a8a500]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\UScreenCapture"
[dshow @ 04a8a500]  "screen-capture-recorder"
[dshow @ 04a8a500]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{4EA6930A-2C8A-4AE6-A561-56E4B5044439}"
[dshow @ 04a8a500]  "virtual-audio-capturer"
[dshow @ 04a8a500]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E14549B-DB61-4309-AFA1-3578E927E935}"


  


  Why is this ?

  


• Anomalie #4633 (Nouveau) : argument ’date’ du pipeline optimiser_base_disparus

  18 janvier 2021, par Maïeul Rouquette

  Hop,

  dans mes logs j’ai ceci

  2021-01-18 18:22:16 127.0.0.1 (pid 13677) :Pri:ERREUR : Erreur 1525 de mysql : Incorrect TIMESTAMP value : ’’2021-01-17 18:22:16’’
  in /home/mrouquet/Sites/dev/localhost/plugins-dist/forum/forum_pipelines.php L308 [sql_delete(),forum_optimiser_base_disparus(),minipipe(),execute_pipeline_optimiser_base_disparus(),pipeline(),optimiser_base_disparus(),optimiser_base(),genie_optimiser_dist(),queue_start_job(),queue_schedule(),action_forcer_job_dist(),traiter_appels_actions()]
  DELETE FROM `spip_localhost`.spip_forum
  WHERE statut=’redac’ AND maj &lt ; ’\’2021-01-17 18:22:16\’’
  2021-01-18 18:22:16 127.0.0.1 (pid 13677) :Pri:ERREUR : Erreur 1525 de mysql : Incorrect TIMESTAMP value : ’’2021-01-17 18:22:16’’
  in /home/mrouquet/Sites/dev/localhost/plugins-dist/mots/mots_pipelines.php L97 [sql_delete(),mots_optimiser_base_disparus(),minipipe(),execute_pipeline_optimiser_base_disparus(),pipeline(),optimiser_base_disparus(),optimiser_base(),genie_optimiser_dist(),queue_start_job(),queue_schedule(),action_forcer_job_dist(),traiter_appels_actions()]
  DELETE FROM `spip_localhost`.spip_mots
  WHERE length(titre)=0 AND maj &lt ; ’\’2021-01-17 18:22:16\’’
  2021-01-18 18:22:16 127.0.0.1 (pid 13677) :Pri:ERREUR : Erreur 1525 de mysql : Incorrect TIMESTAMP value : ’’2021-01-17 18:22:16’’
  in /home/mrouquet/Sites/dev/localhost/plugins-dist/petitions/petitions_pipelines.php L58 [sql_delete(),petitions_optimiser_base_disparus(),minipipe(),execute_pipeline_optimiser_base_disparus(),pipeline(),optimiser_base_disparus(),optimiser_base(),genie_optimiser_dist(),queue_start_job(),queue_schedule(),action_forcer_job_dist(),traiter_appels_actions()]
  DELETE FROM `spip_localhost`.spip_petitions
  WHERE statut=’poubelle’ AND maj &lt ; ’\’2021-01-17 18:22:16\’’
  2021-01-18 18:22:16 127.0.0.1 (pid 13677) :Pri:ERREUR : Erreur 1525 de mysql : Incorrect TIMESTAMP value : ’’2021-01-17 18:22:16’’
  in /home/mrouquet/Sites/dev/localhost/plugins-dist/sites/sites_pipelines.php L228 [sql_delete(),sites_optimiser_base_disparus(),minipipe(),execute_pipeline_optimiser_base_disparus(),pipeline(),optimiser_base_disparus(),optimiser_base(),genie_optimiser_dist(),queue_start_job(),queue_schedule(),action_forcer_job_dist(),traiter_appels_actions()]
  DELETE FROM `spip_localhost`.spip_syndic
  WHERE maj&lt ;’\’2021-01-17 18:22:16\’’ AND statut=’refuse’
  2021-01-18 18:22:16 127.0.0.1 (pid 13677) :Pri:ERREUR : Erreur 1525 de mysql : Incorrect TIMESTAMP value : ’’2021-01-17 18:22:16’’
  in /home/mrouquet/Sites/dev/localhost/plugins-dist/breves/breves_pipelines.php L298 [sql_select(),breves_optimiser_base_disparus(),minipipe(),execute_pipeline_optimiser_base_disparus(),pipeline(),optimiser_base_disparus(),optimiser_base(),genie_optimiser_dist(),queue_start_job(),queue_schedule(),action_forcer_job_dist(),traiter_appels_actions()]
  SELECT B.id_breve AS id
  FROM `spip_localhost`.spip_breves AS B
              LEFT JOIN `spip_localhost`.spip_rubriques AS R
                  ON B.id_rubrique=R.id_rubrique
  WHERE R.id_rubrique IS NULL
              AND B.maj &lt ; ’\’2021-01-17 18:22:16\’’

  Cela vient du fait que $flux[’args’][’date’] du pipeline optimiser_base_disparus est valeur qui est déjà passé par sql_quote(). (cf. fonction `optimiser_base_disparus` du code, qui contient la ligne (`$mydate = sql_quote(date("Y-m-d H:i:s", time() - $attente)) ;`)

  Or la plupart des plugin(-dist) qui utilise ce paramètre $flux[’args’][’date’] pour construire leur requete passe en sql_quote. Du couip double sql_quote.

  La question que je me pose : faut-il corriger les plugins(-dist) ou le core ?

• WebRTC Multi-Stream recording

  11 janvier 2021, par Tim Specht

  I'm currently trying to build a WebRTC streaming architecture that contains multiple users streaming content from their camera in the same "room" and a SFU / MCU on server-side "recording" the incoming video packets, merging them into one image and re-distributing them to the viewers as either RTMP or HLS for added scalability.

  


  Upon doing some initial research on this, Janus Gateway seems like a good fit for this given it's wide adoption across the space + their (seemingly) extensible plugin architecture. Thus, I'm currently trying to figure out what a recommended architecture for my use-case would look like.
I looked at the following plugins :

  


  

  • Janus Streaming

  


  • Janus Recordings

  


  


  While Janus and the Streaming plugin seem like a good start to get the broadcasting aspect within the group of casters in the room, I'm trying to piece together how I could combine the different video sources into a combined one (split horizontally for example if there are 2 casters active) and retransmit the final result as something optimized for broadcast-consumption like HLS. Some of the ways I could imagine doing that :

  


  

  • Implement a custom Janus plugin that transcodes the incoming buffers on the gateway itself

  


  • Forwarding the incoming packets via RTP to a Transcoding server

    

    • In this specific case I am not sure what would be best to implement that ? Are the video frames different tracks ? Could I stream all of them to the same port and have ffmpeg or something similar take care of the merging for me ?