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• vp9lpf/x86 : save one register in loopfilter surface coverage.

  20 décembre 2014, par Ronald S. Bultje

  vp9lpf/x86 : save one register in loopfilter surface coverage.
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DBH] libavcodec/x86/vp9lpf.asm

• Save generated image to ImageField model Django

  7 janvier 2023, par MrLonely

  


  Detected path traversal attempt in '/home/mrlonely/Desktop/lumen/lumen/media/thumbnail/6.jpeg'

  


  


  When i run this in the views.py :

  


  def generate_thumbnail(instance):
   post = Post.objects.get(pk=instance.pk)
   output = 'media/thumbnail/' + post.title + '.jpeg'
   filename_thumbnail = Path.joinpath(filename, output)  
   try:
      (
            ffmpeg
            .input(str(filename)+post.video.url, ss='00:00:20')
            .output(output, vframes=1)
            .overwrite_output()
            .run(capture_stdout=True, capture_stderr=True)
        )
      with open(filename_thumbnail, 'rb') as file_handler:
         django_file = File(file_handler)
         post.thumbnail.save(filename_thumbnail, 'thumbnail/')
   except ffmpeg.Error as e:
        print(e.stderr.decode(), file=sys.stderr)
        sys.exit(1)


  


  I am trying to connect the ffmpeg generated thumbnail to the model ImageField on the Post model (instance is post)

  


• How to convert a CCTV footage into time lapse video by cutting parts of the video by a set interval on FFMPEG [duplicate]

  2 décembre 2020, par mark

  I have bunch of CCTV footages and I want it to look like it was recorded from a time lapse camera. One video file is around 3 hours long capturing scenes in real time (from 1pm-3pm for example). And in one day, I'll get around 8 footages (8files * 3hours = 24hours = 1 day)

  


  I want to convert those 24hours worth of footages to 1min making 1 day = 1min of video not just making it fast but actually cutting some of the scenes by a set interval. Usually, a time lapse camera has an interval of one photo per 10 min and at the end of the day, it will stitch them into one video. How can I do something like that on FFMPEG ?

  


  I'm using FFmpeg Batch converter and here's my code so far. It just makes my videos faster but not cutting it into itervals

  


  -filter:v "setpts=0.25*PTS" -an


  


  I ended up with this code :

  


  -vf framestep=25,select='not(mod(n,1000))',setpts=N/FRAME_RATE/TB -an


  


  The above code will make a 1hr long video into 4sec which is perfect for my needs.