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• Best approach to set up live video streaming between HoloLens2 and Desktop PC

  19 mai 2021, par SilverLife

  First of all, I am sorry for this question. I know its more asking for an advice than asking about any coding problems. Unfortunately I don´t know where else I should ask such a question, so please be patient. (I am open for any recommendations)

  


  Since a while I am searching for a promising approach to stream live videos from a desktop PC via network to my HoloLens 2 unity application. The video transfer should be within a encapsulated network without internet access. Therefore a direct connection between both devices without any signaling- or web-servers would be desirable, if possible. For now we are thinking about sending the stream via ffmpeg and receiving it somehow in the unity application.
So far I came across MixedReality-WebRTC and ffmpegInterop. Unfortunately as I read, WebRTC needs at least some kind of signaling server which manages the connection between the clients. ffmpegInterop seems to be really difficult to integrate into unity.

  


  I am completely new to the topic of low latency video streaming and a bit lost in this complex environment. Can anybody give me an advice about a promising and extendable way to receive a low latency video stream ?

  


• What version of ffmpeg is bundled inside electron ?

  7 août 2020, par greghmerrill

  The prebuilt electron binaries for Windows include the file ffmpeg.dll. How can I determine what version of the underlying ffmpeg library is actually compiled to produce this dll ? I need this information to understand what known vulnerabilities (CVE's, etc) might be in a given version of electron via ffmpeg.

  



  As I understand it, the ffmpeg dll itself is taken from https://github.com/electron/nightlies/releases/ when I download my dependencies (I'm using electron-prebuilt-compile). But I'm not getting a clear picture of what the source for that binary is. I think it might be from https://chromium.googlesource.com/chromium/third_party/ffmpeg/ but then I'm not clear on the relationship of that repo with the original ffmpeg repo (e.g. how often are fixes merged from the ffmpeg repo to the chromium third-party repo, etc.)

  



  I tried searching the content of the dll as per cody's suggestion, but no luck :

  



  $ strings ffmpeg.dll  | grep -i ffmp
FFmpeg video codec #1
Huffyuv FFmpeg variant
Not yet implemented in FFmpeg, patches welcome
C:\projects\libchromiumcontent\src\out-x64\static_library\ffmpeg.dll.pdb
ffmpeg.dll


$ strings ffmpeg.dll  | grep -i version
H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2
MPEG-4 part 2 Microsoft variant version 1
MPEG-4 part 2 Microsoft variant version 2
MPEG-4 part 2 Microsoft variant version 3
H.263+ / H.263-1998 / H.263 version 2
On2 VP6 (Flash version)
On2 VP6 (Flash version, with alpha channel)
old standard qpel (autodetected per FOURCC/version)
direct-qpel-blocksize bug (autodetected per FOURCC/version)
edge padding bug (autodetected per FOURCC/version)
strictly conform to a older more strict version of the spec or reference software
minor_version
premiere_version
quicktime_version
Assume this x264 version if no x264 version found in any SEI


  


• Evolution #4754 : Mettre à jeu le jeu des icônes de extensions

  30 avril 2021, par b b

  Amha, SVG partout et zou, et si nécessaire on pourra générer du PNG en masse à partir des SVG.

  Je proposais donc le pack Yaru https://github.com/ubuntu/yaru/tree/master/icons/src/fullcolor/mimetypes (icônes d’Ubuntu) complet, sobre mais il est trop coloré et "en relief" maintenant qu’on est plutôt en mode flat sur le jeu d’icônes du privé, exemples :

  https://github.com/ubuntu/yaru/blob/master/icons/src/fullcolor/mimetypes/text-markdown.svg
  https://github.com/ubuntu/yaru/blob/master/icons/src/fullcolor/mimetypes/x-office-spreadsheet.svg

  Sinon, il y a aussi Papirus & Vimix, et surtout Numix qui est très fourni :

  https://github.com/PapirusDevelopmentTeam/papirus-icon-theme/blob/master/Papirus/64x64/mimetypes/application-pdf.svg
  https://github.com/vinceliuice/vimix-icon-theme/blob/master/src/scalable/mimetypes/application-pdf.svg
  https://github.com/numixproject/numix-icon-theme/blob/master/Numix/64/mimetypes/application-pdf.svg