Recherche avancée

Sur d’autres sites (5709)

• expected str, bytes or os.PathLike object, not NoneType for subprocess of ffmpeg

  15 janvier 2024, par ejmin ejoni

  I dont know much about ffmpeg, subprocess and its functions, im trying to take a screenshot form a video and save it at my other field of my model.
this is my model :

  


  class SubSong(models.Model):
song = models.ForeignKey(SongPage, on_delete=models.CASCADE, related_name='related_song')
create = jmodels.jDateField(auto_now_add=True)
user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='related_user')
video = models.FileField(upload_to='sub_video/',)
like = models.ManyToManyField(User, blank=True, )
total_like = models.PositiveIntegerField(default=0)
is_allowed = models.BooleanField(default=False)
image_sub = ThumbImage(upload_to='sub_songs/', default='1.jpg')

def __str__(self):
    return self.song.title


  


  and views.py

  


      if request.method == 'POST':
    authen(request)
    form = MyTryForm(request.POST, request.FILES)
    if form.is_valid():
        data = form.cleaned_data
        x = SubSong.objects.create(song_id=id,
                                   user_id=request.user.id,
                                   video=data['video'], )
        path = x.video.name
        out = path.replace('sub_video/', '').replace('mp4', 'jpg')
        z=subprocess.check_output(
            ffmpeg.input('media/' + path, ss='00:00:50').filter(
                'thumbnail').output('media/sub_songs/' + out, vframes=1).run(), text=True)
        x.image_sub=z
        x.save()
        messages.success(request, 'ویدیوی شما با موفقیت ارسال شد ، پس از بررسی منتشر خواهد شد')
        return redirect(request.META.get('HTTP_REFERER'))

    else:
        messages.error(request, 'ویدیوی شما بارگداری نشد')
        return redirect(request.META.get('HTTP_REFERER'))


  


  it can save the video and also default picture 1.jpg at image_sub. also it can save scrrenshot at the media/sub_song/.but my problem is that it gives me error :
expected str, bytes or os.PathLike object, not NoneType
how i should return the screen from subprocess to save it as my image_sub field ? and why do this error raise ? i dont want to see this error again

  


• ffmpeg capture single window screen freezes with only mouse working

  2 septembre 2015, par Saad Abdullah

  Scenario and Problem :
  I have two machines with windows 8.1 installed. On one computer, every thing works fine with video recording by using gdigrab to capture a window by title. But on the other pc, the desktop recording works fine, but when it comes to capture single window by title, the video freezes with only mouse working. (to be exact, if i play webcam or images in the window being captured, it records the content too, but when some video is played it starts showing black screen or freezed at first frame.

  Commandline :
  here is the commandline args

  ffmpeg -f gdigrab -framerate 30 -i title="Video - VLC media player" germ.flv

  What can be the issue on the other pc ?

• avfilter/formats : allow unknown channel layouts by default

  22 novembre 2016, par Marton Balint

  avfilter/formats : allow unknown channel layouts by default
  Since the default in the libav fork is to only allow known layouts, making
  
  unknown layouts allowed by default here can be a security risk for filters
  
  directly merged from libav. However, usually it is simple to detect such cases,
  
  use of av_get_channel_layout_nb_channels is a good indicator, so I suggest we
  
  change this regardless.
  See http://ffmpeg.org/pipermail/ffmpeg-devel/2016-November/203204.html.
  This patch indirectly adds unknown channel layout support for filters where
  
  query_formats is not specified :
  abench
  
  afifo
  
  ainterleave
  
  anullsink
  
  apad
  
  aperms
  
  arealtime
  
  aselect
  
  asendcmd
  
  asetnsamples
  
  asetpts
  
  asettb
  
  ashowinfo
  
  azmq
  It introduces a query_formats callback for the asyncts filter, which only
  
  supports known channel layouts since it is using libavresample.
  And it removes .query_formats callback from filters where it was only there to
  
  support unknown layouts, as this is now the default :
  aloop
  
  ametadata
  
  anull
  
  asidedata
  
  asplit
  
  atrim
  Acked-by : Nicolas George <george@nsup.org>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavfilter/af_anull.c
  • [DH] libavfilter/af_asyncts.c
  • [DH] libavfilter/f_loop.c
  • [DH] libavfilter/f_metadata.c
  • [DH] libavfilter/f_sidedata.c
  • [DH] libavfilter/formats.c
  • [DH] libavfilter/formats.h
  • [DH] libavfilter/split.c
  • [DH] libavfilter/trim.c