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• Celery to process task and modify the model fields

  15 juillet 2015, par Robin

  I would like to convert video into mp4 using ffmpeg and celery for the asynchronous task. When user uploads a video, it will be for the original_video and save it. After that I want celery to convert it into a different version for the mp4_720 field. However I am confused on how to apply that logic using celery.

  app.models.py :

  class Video(models.Model):
  
      title = models.CharField(max_length=75)
  
      pubdate = models.DateTimeField(default=timezone.now)
  
      original_video = models.FileField(upload_to=get_upload_file_name)
  
      mp4_720 = models.FileField(upload_to=get_upload_file_name, blank=True, null=True)
  
      converted = models.BooleanField(default=False)

  app.views.py :

  def upload_video(request):
  
      if request.POST:
  
          form = VideoForm(request.POST, request.FILES)
  
          if form.is_valid():
  
              video = form.save(commit=False)
  
              video.save()
  
  
  
              // Celery to convert the video
  
              convert_video.delay(video)
  
  
  
              return HttpResponseRedirect('/')
  
      else:
  
          form = VideoForm()
  
      return render(request, 'upload_video.html', {
  
          'form':form
  
      })

  app.tasks.py :

  @app.task
  
  def convert_video(video):
  
  
  
      // Convert the original video into required format and save it in the mp4_720 field using the following command:
  
      //subprocess.call('ffmpeg -i (path of the original_video) (video for mp4_720)')
  
  
  
      // Change the converted boolean field to True
  
  
  
      // Save

  Basically my question is how to save the converted video in mp4_720. Your help and guidance will be very much appreciated. Thank you.

  ** update **

  What I want that method to do is first convert the video.original_video and then save the converted video in the video.mp4_720 field. If all has been done correctly, change the video.converted to True. How do I define the method to do so ?

• movtextenc.c : Reorganize the code for easier maintenance

  20 juillet 2015, par Niklesh

  movtextenc.c : Reorganize the code for easier maintenance
  This patch reorganizes the code to make it easier to add support for different text modifier boxes and other styles in the future.
  Signed-off-by : Niklesh <niklesh.lalwani@iitb.ac.in>
  

  • [DH] libavcodec/movtextenc.c

• How to add watermark to video in Flutter using Flutter_ffmpeg

  14 mai 2021, par user433575

  I cannot figure out why my ffmpeg commands aren't working...

  


    Future<void> watermark(filePath, width, height) async {&#xA;&#xA;final String outPath = &#x27;watermarked.mp4&#x27;;&#xA;final String inputVideo =&#xA;    await rootBundle.loadString(&#x27;assets/ffmpeg/demo.mov&#x27;);&#xA;final String inputWatermark = await rootBundle&#xA;    .loadString(&#x27;assets/ffmpeg/video_overlay.png&#x27;);&#xA;final arguments =&#xA;    &#x27;-i $inputVideo -i $inputWatermark -filter_complex overlay=10:10 -codec:a copy $outPath&#x27;;&#xA;&#xA;&#xA;final int rc = await FlutterFFmpeg().execute(arguments);&#xA;assert(rc == 0);&#xA;print("outPath $outPath");&#xA;&#xA;uploadFile(outPath, "gallery");&#xA;</void>

  


  }

  


  Thanks