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• avformat/mxfenc : Correct klv_fill_key

  29 mai 2015, par Michael Niedermayer

  avformat/mxfenc : Correct klv_fill_key
  See SMPTE 377-1-2009 6.3.3 KLV Fill Items
  Reviewed-by : tim nicholson <nichot20@yahoo.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/mxfenc.c
  • [DH] tests/ref/lavf/mxf
  • [DH] tests/ref/lavf/mxf_d10
  • [DH] tests/ref/lavf/mxf_opatom
  • [DH] tests/ref/lavf/mxf_opatom_audio

• I am calling ffmpeg from Python. Getting thread.error and repeated attempts to connect to audio stream

  16 février 2016, par user2192778

  I have some code which calls ffmpeg at a particular time of the day to record a web stream. First, the function that calls ffmpeg...

  def record_stream(): 
  
      ffmpegEXE = "C:/pathtoffmpeg/ffmpeg.exe"
  
      subprocess.call([ffmpegEXE, '-i', http://streamurl.mp3, output.mp3], shell=True)

  Then, the function which schedules record_stream according to the clock...

  def sched ():
  
      i = 0
  
      while True:
  
  
  
      x = datetime.today()
  
      y=x.replace(day=x.day+1, hour=i, minute= start_minute, second=0, microsecond=0) 
  
      delta_t=y-x
  
      secs=delta_t.seconds+1
  
      t = Timer(secs,stream_record)
  
      t.start()
  
      i = (i + 1) % 24

  When I launch the .py program an error reads :

  Traceback <most recent="recent" call="call" last="last">
  
  ... line X, in <module>
  
  sched ()
  
  ... line Y, in sched ()
  
  t.start()
  
  ... line Z, in start
  
  _start_new_thread(self.__bootstrap,())
  
  thread.error: can't start new thread
  
  </module></most>

  Despite the error, the program runs.

  When it runs, however, ffmpeg initializes over and over again. It connects to the stream, then connects to the stream again (this time saying "output.mp3 already exists. Overwrite ? Y/N" It will do this ten or so times until it finally just records the stream in a normal way.

  How do I fix these errors ? How do I stop this issue with ffmpeg connecting repeatedly ?

• ffmpeg adds silence when used with input text file

  1er octobre 2022, par AncientToaster

  I'm using ffmpeg's concat option to combine a series of still images with an mp3 file. The total duration of my input.txt file is 12532 seconds, which is exactly the same as the total duration of my mp3 file (3:28:52, or 12532 seconds).

  


  But ffmpeg is adding 200 seconds of audio-free content to the end of the video. I've tried totaling and re-totaling the total duration of input.txt and it all seems to add up to the same amount. Including or excluding the -shortest flag also doesn't seem to matter.

  


  


  • ffmpeg command :

    


    ffmpeg -f concat -i input.txt -i input.mp3 -shortest -c:v libx264 -r 1 -pix_fmt yuv420p output.mp4


    


  


  • input.txt source

    


  


  • input.mp3

    


  


  • output file

    


  


  


  I'm having the same issue (differing amounts of time) with other videos.