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• How to add MOV file header to raw data written file with ffmpeg ?

  10 janvier 2018, par gstream79

  I am going to record H264 encoded video stream data in iOS using swift.
  I am not familiar with video codec formats so don’t know how to do this. But I’ve tried to write the H264 raw video data to the file sequently and see its file Info. I am surprised that it has almost video file info (compared with standard mp4, MOV file). The only missing info is video duration, file size, overall bit rate, encoded data, etc. So I am just wondering if video can play if I add the MOV file header to this file manually. Spent few hours to googling how to add MOV file header with ffmpeg but stacked. Any help would be appreciated. Thanks

• I want the mp4 file shooting date to be the xml file name

  21 novembre 2019, par re6

  In Windows 10 environment, I would like to change the name of both “file with extension mp4” and “file with extension xml” to the shooting date of mp4 file.

  C0001.MP4
  
  C0001M01.XML
  
  C0002.MP4
  
  C0002M01.XML

  Specifically, I want to change the file name as follows.

  2019-10-23_13-10-32.MP4
  
  2019-10-23_13-10-32.XML
  
  2019-10-23_13-10-49.MP4
  
  2019-10-23_13-10-49.XML

  ---

  I tried to think that using the ext option would give me the expected result, but I didn’t get the expected result.

  First time

  C:\Users\user>exiftool "-FileNamehoge/C0001M01.XML
  
  Warning: No writable tags set from C:/hoge/C0001M01.XML
  
  Warning: [minor] Error 3 placing ::NonRealTimeMetaAudioFormatAudioRecPortTrackDst in structure or list - C:/hoge/C0002M01.XML
  
  Warning: No writable tags set from C:/hoge/C0002M01.XML
  
      1 directories scanned
  
      0 image files updated
  
      2 image files unchanged

  Second time

  C:\Users\user>exiftool "-FileNamehoge/C0001.MP4
  
  Warning: [minor] Error 3 placing ::NonRealTimeMetaLtcChangeTableLtcChangeStatus in structure or list - C:/hoge/C0001M01.XML
  
  Warning: No writable tags set from C:/hoge/C0001M01.XML
  
  Warning: [minor] The ExtractEmbedded option may find more tags in the movie data - C:/hoge/C0002.MP4
  
  Warning: [minor] Error 3 placing ::NonRealTimeMetaAudioFormatAudioRecPortPort in structure or list - C:/hoge/C0002M01.XML
  
  Warning: No writable tags set from C:/hoge/C0002M01.XML
  
      1 directories scanned
  
      2 image files updated
  
      2 image files unchanged

• Streaming live image with HLS

  20 février 2019, par kabab

  I have a stream of images that come from a live video (RTP), the images pass through a pipeline of transformations, and I would like to stream the video again using HLS to the enduser, How can I take the buffer of images and stream it live using HLS ?

  ---

  The current solution that I m using is returning the frames using http which is too slow and not scalable.

  @app.route("/")
  
  def main():
  
      return Response(gen(),
  
                    mimetype='multipart/x-mixed-replace; boundary=frame')
  
  
  
  def gen():
  
      while True:
  
          time.sleep(.04)
  
          data = get()
  
          yield (b'--frame\r\n'
  
                 b'Content-Type: image/jpeg\r\n\r\n' + data.tobytes() + b'\r\n\r\n')