Recherche avancée

Sur d’autres sites (10450)

• Run ffmpeg from its parent directory in node js application in its own directory

  3 septembre 2022, par Belb

  I have a node js application which needs to access ffmpeg. My approach to this has been to use exec from the child_processes module built into Node. The problem is that exec always starts the cmd line from the current directory and I can't figure out how to point the directory context to where ffmpeg.exe is located so that I can access the program. Is my approach flawed ? How can I access a seperate CLI application from Node ?
  
This code returns "'ffmpeg' is not recognized as an internal or external command" because I'm obviously in Node's execution context which is not where ffmpeg is located.
  
I also do not want to store the node application in the directory of ffmpeg.exe because that's just lazy and impractical.

  


  exec(`ffmpeg -i ${filepathToMedia} --vf fps=1 ${outputdirectory}/out%d.png`, (error, stdout, stderr) => {
if (error) {
    console.log(`error: ${error.message}`);
    return;
}
if (stderr) {
    console.log(`stderr: ${stderr}`);
    return;
}
if(stdout) {
    console.log(`success: ${stdout}`)
} });


  


• aacenc_tns : rework coefficient quantization and filter application

  1er septembre 2015, par Rostislav Pehlivanov

  aacenc_tns : rework coefficient quantization and filter application
  This commit reworks the TNS implementation to a hybrid between what
  
  the specifications say, what the decoder does and what’s the best
  
  thing to do.
  The filter application function was copied from the decoder and
  
  modified such that it applies the inverse AR filter to the
  
  coefficients. The LPC coefficients themselves are fed into the
  
  same quantization expression that the specifications say should
  
  be used however further processing is not done, instead they’re
  
  converted to the form that the decoder expects them to be in
  
  and are sent off to the compute_lpc_coeffs function exactly the
  
  way the decoder does. This function does all conversions and will
  
  return the exact coefficients that the decoder will generate, which
  
  are then applied to the coefficients.
  
  Having the exact same coefficients on both the encoder and decoder
  
  is a must since otherwise the entire sfb’s over which the filter
  
  is applied will be attenuated.
  Despite this major rework, TNS might not work fine on some audio
  
  types at very low bitrates (e.g. sub 90kbps) as it can attenuate
  
  some coefficients too much. Users are advised to experiment with
  
  TNS at higher bitrates if they wish to use this tool or simply
  
  wait for the implementation to be improved.
  Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
  

  • [DH] libavcodec/aacenc.c
  • [DH] libavcodec/aacenc.h
  • [DH] libavcodec/aacenc_tns.c
  • [DH] libavcodec/aacenc_tns.h

• FFMPEG : Application Error 0xc0000005

  9 septembre 2014, par oneofakind

  I have been running a script on ffmpeg and does fine in most of the PC that I deployed in. But, on few of them it keeps displaying an error 0xc0000005. I believe this is a Access Violation Error from the windows updates.

  I ran this command :

    fmpeg -r 4 -f dshow -an -i video="screen-capture-recorder" -video_size 2880x900 "C:\test.mp4"

  I tried to uninstall the windows update 2859537 but it does not exist. Is there any other way to fix this issue ? Please Help.

  Thank you.