Recherche avancée

Sur d’autres sites (9524)

• lavc/hevcdec : only set no_rasl_output_flag for IRAP frames

  1er juin 2024, par Anton Khirnov

  lavc/hevcdec : only set no_rasl_output_flag for IRAP frames
  Its meaning is only specified for IRAP frames.
  As it's currently never used otherwise, this should not change decoder
  
  behaviour, but will be useful in future commits.
  

  • [DH] libavcodec/hevc/hevcdec.c
  • [DH] libavcodec/hevc/hevcdec.h

• TypeError : 'function' object is not subscriptable Python with ffmpeg

  25 novembre 2019, par S1mple

  clips = []
  
  
  
  def clipFinder(CurrentDir, fileType):
  
      clips.clear()
  
      for r,d,f in os.walk(CurrentDir):
  
          for file in f:
  
              if fileType in file:
  
                  clips.append(r+file)
  
      random.shuffle(clips)
  
  
  
  def removeVods(r):
  
      for f in clips:
  
          if 'vod' in clips:
  
              os.remove(r+f)
  
  
  
  def clipString():
  
      string = 'intermediate'
  
      clipList = []
  
      clipNum = 1
  
      for f in clips:
  
          clipList.append(string+str(clipNum)+'.ts'+'|')
  
          clipNum+=1
  
      string1 = ''.join(clipList)
  
      string2 = string1[0:len(string1)-1]
  
      return string2
  
  
  
  def concatFiles():
  
      clipFinder('***', '.mp4')
  
      removeVods('***')
  
      i = 0
  
      intermediates = []
  
      for f in clips:
  
          subprocess.call(['***', '-i', clips[i], '-c', 'copy', '-bsf:v', 'h264_mp4toannexb', '-f', 'mpegts', 'intermediate'+ str(i+1) +'.ts'])
  
          i += 1 
  
      clipsLength = len(clips)
  
      subprocess.call['***', '-i', '"concat:' + clipString() + '"', '-c', 'copy', '-bsf:a 
  
      aac_adtstoasc', 'output.mp4']

  I am trying to make a clip concatenator, but the last subprocess call won’t run and gives me the error shown in the question.

  Problematic code :

  subprocess.call(['***', '-i', '"concat:' + clipString() + '"', '-c', 'copy', '-bsf:a aac_adtstoasc', 'output.mp4'])

  all places with * were paths such as :
  /davidscomputer/bin/ffmpeg/

• Sharing FFMPEG video stream data between processes

  21 juin 2016, par lgaravaglia

  I’m trying to find a method for sharing FFMPEG library datatypes between two processes.

  The project that I’m working on requires one process to buffer the FFMPEG stream that is being received and another process needs to read from the buffer and perform some actions on the video stream. Unfortunately, I can’t use a multi-threaded approach for this project. Due to some limitations in my system I have to use separate processes.

  The data that I would like to share I have placed in a general struct as follows :

  struct FFMPEGData {
  
  AVFormatContext *pFormatCtx;
  
  AVCodecContext  *pCodecCtx;
  
  AVCodec         *pCodec;
  
  AVFrame         *pFrame, dst;
  
  AVPacket        *packet;
  
  AVPacket* pack = new AVPacket[packetNum];
  
  };

  The buffering process uses the format context and codec context to read the video stream and then it places packets in the AVPacket array pack. The other process should grab packets from the array and decode them, also using the format and codec contexts.

  I looked into the Boost Interprocess library, but that does not seem to be setup to handle this type of situation easily.

  Would anyone know a method for sharing my general struct between multiple processes ?