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• Is there anyway to capture lock screen with ffmpeg or electron getUserMedia

  17 février 2023, par Craig Zych

  I'm trying to create a remote desktop app.

  



  Everything is working great except I can't find a way to capture the windows lock screen to allow login from remote.

  



  I'm using electron and getUserMedia which will show the lock screen on macOS but just hangs with a still image on Windows until the screen is unlocked.

  



  Is there any way to capture the lock screen on windows using the built in getUserMedia or ffmpeg ?
If not do you have any other suggestions of ways to capture ? I don't need high framerate on the lock screen.

  


• FFmpeg - how to adjust video duration to sound duration if sound is longer, possible without re-encoding it with mp3 file ?

  21 décembre 2017, par DarioBB

  I have a problem. I have recorded my videos separately, and then added sound to it. Sometimes, sound is longer or less in duration compared to video duration. Usually sound is longer, sometimes around 20 seconds. To me, when running on my PC through flv or some Windows Media player, that is not problem, since after video is over, last capture of video stays displayed (like an image), and sounds is still executing, and video ends after sound is over. So everything is ok at my PC when running it like .flv or .mp4 file. But, when I upload that on Google drive or some other place on web (that is, when I run it in my browser for viewing after upload), I see my video is cutted to the lenght of the video duration (so my sound is cutted). I understand that this is because of different duration sizes of sound and video.

  Now I need a command with ffmpeg that can make my video to be extened to my sound duration. I would like not to reencode my videos with sound again (in sense that I would need to put my mp3 file in ffmpeg command) if I don’t need (since I have many videos and sound is already inserted in them), but just to reencode video with some ffmpeg command.

  I have watched this (not sure at the momen if this would even help me) :
  https://superuser.com/questions/801547/ffmpeg-add-audio-but-keep-video-length-the-same-not-shortest

  But with this approach, you have to reencode video with sound (mp3 or similar) file first.

  Can it be done, and what would be command, or commands for it ?
  (Edit : And if only way is to re-encode it with mp3 file, what would be command for it ?)

  Edit : I don’t want to cut my sound, I need to hold last frame till my sound is over. Currently last frame is holded only when viewing on my PC, when I upload that, clip is cutted immediately when video stops.

• How to remove the background sound of sport commentary sound clip in ffmpeg

  28 juillet 2015, par user0001

  I’m working on a project which needs to convert sport commentary to text. For that I have already used Microsoft system speech library. It’s working fine without background noises. Can any one tell me a way of removing this background noise from the given audio file by using ffmpeg-like tool or in some other programmatic way.