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• avformat/mov: support for LCEVC tracks

  15 August 2024, by James Almer

  avformat/mov: support for LCEVC tracks
  Co-authored-by: V-Nova Team <systems@v-nova.com>
  
  Signed-off-by: James Almer <jamrial@gmail.com>
  

  • [DH] Changelog
  • [DH] libavformat/isom.h
  • [DH] libavformat/isom_tags.c
  • [DH] libavformat/mov.c

• Using Rust to execute FFMPEG commands

  5 April 2023, by Mypantsrtooobig

  I am using rust to envoke some an ffmpeg command to record desktop audio, microphone audio, and desktop video. I type the command in the CMD and it works, here is that command.
ffmpeg -hide_banner -f dshow -i audio="Microphone (Arctis Nova Pro Wireless)" -f dshow -i audio="What U Hear (Sound Blaster Audigy 5/Rx)" -filter_complex amix=inputs=2 -f gdigrab -framerate 60 -show_region 1 -video_size 600x600 -offset_x 10 -offset_y 20 -i desktop -strftime 1 -y "out%Y-%m-%d_%H-%M-%S.mp4"

  


  And this is the command object with all the arguments

  


  let mut ffmpegcommand = Command::new("ffmpeg");
    ffmpegcommand.arg("-hide_banner")
    .arg("-y")
    .arg("-f")
    .arg("dshow")
    .arg("-i")
    .arg("audio=\"Microphone (Arctis Nova Pro Wireless)\"") 
    .arg("-f")
    .arg("dshow")
    .arg("-i")
    .arg("audio=\"What U Hear (Sound Blaster Audigy 5/Rx)\"")
    .arg("-filter_complex")
    .arg("amix=inputs=2")
    .arg("-f")
    .arg("gdigrab")
    .arg("-framerate")
    .arg("60")
    .arg("-show_region")
    .arg("1")
    .arg("-video_size")
    .arg("600x600")
    .arg("-offset_x")
    .arg("100")
    .arg("-offset_y")
    .arg("100")
    .arg("-i")
    .arg("desktop")
    .arg("-strftime")
    .arg("1")
    .arg("G:\\School\\Capstone\\screenshotFFMPEG\\%Y-%m-%d_%H-%M-%S.mp4");
    ffmpegcommand.status().expect("DID NTO WORK LOSER");


  


  Envoking this command results in this error from the console:

  


  [dshow @ 0000026421be4880] Could not find audio only device with name ["Microphone (Arctis Nova Pro Wireless)"] among source devices of type audio.
[dshow @ 0000026421be4880] Searching for audio device within video devices for "Microphone (Arctis Nova Pro Wireless)"
[dshow @ 0000026421be4880] Could not find audio only device with name ["Microphone (Arctis Nova Pro Wireless)"] among source devices of type video.
audio="Microphone (Arctis Nova Pro Wireless)": I/O error


  


  I would think that the error is the device name is wrong being that they NEED to have the "'s when ffmpeg gets it but I am lost because in the error the name is perfectly identical with the output for the device when I do a ffmpeg -list_devices command

  


  [dshow @ 0000013ea9cfe600] "Microphone (Arctis Nova Pro Wireless)" (audio)
[dshow @ 0000013ea9cfe600]   Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{DE99F572-E285-4EBC-A263-2D782B212FA7}"


  


  There are no spaces and to my knowledge the names are identical. I am at a loss, any assistance is appriciated.

  


• PowerShell doesn't recognize string correctly

  20 January 2020, by fdroid

  I’m passing a command to powershell

  Dim command As String
  
  command = "ffmpeg -vsync 0 –hwaccel cuvid -c:v h264_cuvid –resize 1280x720 -i D:\Imagens\nova\bol.mkv -c:a copy -c:v h264_nvenc -b:v 5M D:\Imagens\nova\bol_encod.mkv"

  with

  Dim powerShell As String = "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
  
      Process.Start("powershell", "-noexit " + command)

  but powershell returns

  Unable to find a suitable output format for ’ÔÇôhwaccel’ ÔÇôhwaccel:
  Invalid argument

  where I believe ’ÔÇôhwaccel’ to be –hwaccel; That’s completely strange, once when I past the code directly on PowerShell it works fine.

  Is that a problem with my string?

  thank you!