Recherche avancée

Sur d’autres sites (7109)

• download and fill file on fly

  4 mai 2017, par Gianluca Calabria

  I’m trying to create a service for a client which takes some audio chunks and concatenate them. For this I’m using FFmpeg. The user should also be able to download the result on the fly without waiting for the conversion/concatenation to finish. The idea is to "fill" the file as the process goes on. I cannot work my way around it, is it possible to do ? I’m using a RESTful service which calls a class like this one

  public ReadableRepresentation serveDownloadRequest(Representation entity) throws SystemInitializationException {
  
      InputStreamChannel inputStreamChannel;
  
      Form reqParameters=getQuery();
  
      try {
  
  
  
          String parameters = readStringParameter(reqParameters, AudioCutAndJoinParameters.PARAMETERS, AudioCutAndJoinParameters.PARAMETERS_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.PARAMETERS + "=" + parameters);
  
  
  
          String inputUri = readStringParameter(reqParameters, AudioCutAndJoinParameters.INPUT_URI, AudioCutAndJoinParameters.INPUT_URI_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.INPUT_URI + "=" + inputUri);
  
  
  
          String markInRelative = readStringParameter(reqParameters, AudioCutAndJoinParameters.MARKIN_ID_RELATIVE, AudioCutAndJoinParameters.MARKIN_ID_RELATIVE_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.MARKIN_ID_RELATIVE + "=" + markInRelative);
  
  
  
          String parametersString = readStringParameter(reqParameters, AudioCutAndJoinParameters.PARAMETERS_STRING, AudioCutAndJoinParameters.PARAMETERS_STRING_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.PARAMETERS_STRING + "=" + parametersString);
  
  
  
          String cmdFolder = readStringParameter(reqParameters, AudioCutAndJoinParameters.COMMAND_FOLDER, AudioCutAndJoinParameters.COMMAND_FOLDER_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.COMMAND_FOLDER + "=" + cmdFolder);
  
  
  
          Map markInIdRelativeMap=JsonEntityManager.getInstance().deserializeMap(markInRelative);
  
          Map parametersMap=JsonEntityManager.getInstance().deserializeMap(parameters);
  
          List <string> InputUri= JsonEntityManager.getInstance().deserializeList(inputUri);
  
  
  
          InputStream transcodeOutput = Services.getInstance().runAudioCutAndJoin(parametersMap,markInIdRelativeMap,InputUri,parametersString,cmdFolder);
  
          inputStreamChannel = new InputStreamChannel(transcodeOutput);
  
  
  
          ReadableRepresentation result = new ReadableRepresentation(inputStreamChannel, MediaType.AUDIO_ALL);
  
  
  
          Disposition disp = new Disposition(Disposition.TYPE_ATTACHMENT);
  
  
  
          disp.setFilename("test-cut.wav");
  
          result.setDisposition(disp);
  
  
  
          return result;
  
  </string>

  I’m using the process.getInputStream() as return of my runAudioCutAndJoin but no download happens until the process of conversion/concatenation is done. Can somebody please help me out ?

• How to use google/zx to execute ffmpeg shell in windows ?

  26 août 2021, par radiorz

  I download the ffmpeg through scoop,
and I can
My script is below :

  


  #!/usr/bin/env zx
const filePath = `./abc.mp4`;
const srsServerURL = `192.168.30.100`;
await $`ffmpeg -re -i ${filePath} -c copy -f mp4 -y rtmp://${srsServerURL}/live/livestream`;


  


  but the zx tell me that ffmpeg not found.

  


• Adding Support for resuming download with FFMPEG ?

  5 février 2019, par INDIERs

  Currently i am using this to download hls streams with ffmpeg in android app

  ffmpeg -protocol_whitelist file,http,https,tcp,tls,crypto -i "input.m3u8" -codec copy video.mp4

  it is working as it should.

  In case of network lost, the file will be downloaded from BEGINNING which is ofc not good at all.

  I did some research but didn’t found anything great, just these never implemented ideas :

  First is get the duration of downloaded video file and then downloading the video from duration +0.1

  Result High chances of FrameLoss. Dropped.

  Second is to download all ts files one by one ofc using any downloader, using custom script, then concat them.

  Result : Okay but needs space double of origial filesize, Dropped.

  Third is to Download First segment Convert it to MP4 then download second segment convert to mp4 then concat with First Segment and so on... while Keeping records.

  Result : Nice One but repeating same task for more than 2000 time, will it be Okay ? .

  is there any better workaround for this ?

  I’ve already showed the logic i tried.