How do I set the duration of the output of a job in Elastic Transcoder using Django?

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• Django multiple ManyToManyField with same model

  When I only have one ManyToManyField the model works but when I add a second the serializer doesn't save.

  View:

  @api_view(['POST'])
  def update(request, pk):
      poll = Poll.objects.get(id=pk)
      serializer = PollSerializer(instance=poll, data=request.data)
      if serializer.is_valid():
          serializer.save()
      return Response(serializer.data)
  

  Model:

  class Poll(models.Model):
      title = models.CharField(max_length=200)
      option1 = models.CharField(max_length=200)
      option2 = models.CharField(max_length=200)
      option1total = models.IntegerField(default=0)
      option2total = models.IntegerField(default=0)
      owner = models.CharField(max_length=150, null=True)
      option1votes = models.ManyToManyField(User, related_name="option1votes")
      option2votes = models.ManyToManyField(User, related_name="option2votes")
  

  Example request:

  {'id': 17, 'title': 'What is your favorite programming language?', 'option1': 'Javascript', 
  'option2': 'Python', 'option1total': 2, 'option2total': 25, 'owner': None, 'option1votes': [], 
  'option2votes': [14]}
  
• HTML if div content is long show button

  I have this django app I made, and it is a blog app. The blogs are quite long, so I want to be able to show a little and then more of the div's text if the blog is long. Here is my html:

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  So how would I get this to actually work. To summarize, I want this to check if a div is longer than 1000 characters, and if it is, to run the if statement above. Thanks.
• Reload DataTable content with jQuery ajax call

  I have a DataTable and I want to filter it's content depending on what user selects in form. Here is the sample of code I use:

  $(document).on('click', '#filter_btn', filterList)
  
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    var form_data = $('.filter-form').serialize()
    var url = window.location.origin + '/my-amazing-url/'
  
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  On server side Django returns following:

  ...
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• S3 - Access object inside "folder" using boto3

  Dealing with S3 I know that we don't have such thing as a folder but I will call it that way to try exemplification my problem. The bucket name is "Exemple". Inside the bucket we have "/folder1", inside folder1 we have "/folder2" and inside folder2 we have "/goalFile.csv". I am sure that the problem is not in the access key or in the secret access key. Here it is what I have been trying:

  import sys
  if sys.version_info[0] <3:
    from StringIO import StringIO #Python 2.X
  else:
    from io import StringIO #Python 3.X
  
  client = boto3.client('s3', aws_access_key_id='myKeyID',
                        aws_secret_access_key='mySecretKeyID')
      
  bucket_name = 'exemple'
  object_key ="/folder1/folder2/goalFile.csv" 
  
  csv_obj = client.get_object(Bucket=bucket_name, Key=object_key)
  body = csv_obj['Body']
  csv_string= body.read().decode('utf-8')
  

  i got the following error message: "ClientError: An error occurred (SignatureDoesNotMatch) when calling the GetObject operation: The request signature we calculated does not match the signature you provided. Check your key and signing method."
• Read .pptx file from s3

  I try to open a .pptx from Amazon S3 and read it using the python-pptx library. This is the code:

  from pptx import Presentation
  import boto3
  s3 = boto3.resource('s3')
  
  obj=s3.Object('bucket','key')
  body = obj.get()['Body']
  prs=Presentation((body))
  

  It gives "AttributeError: 'StreamingBody' object has no attribute 'seek'". Shouldn't this work? How can I fix this? I also tried using read() on body first. Is there a solution without actually downloading the file?
• AWS Cost Explorer API not grabbing all data - NextPageToken possible issue?

  I have a script that successfully grabs cost data from AWS using boto3 and the cost explorer API. When I input the dates to give me data from Jan-Dec, I only get data from Jan-April. I then tried April-July and August-October and November-December and that worked/gave me the data. I am trying to get Jan-Dec data all from 1 run of the script but im not getting an error message. I believe it has to do with nextpagetoken and the while loop not correctly working. how do i fix the nextpagetoken part to give me all results?

  **Paginator does not comply with this specific api call

  My code is very similar to this:

  https://github.com/hjacobs/aws-cost-and-usage-report/blob/master/aws-cost-and-usage-report.py

  results = []
  
  token = None
  while True:
      if token:
          kwargs = {'NextPageToken': token}
      else:
          kwargs = {}
      data = cd.get_cost_and_usage(TimePeriod={'Start': '2020-01-01', 'End':  
  '2020-12-10'}, Granularity='DAILY', Metrics=['AmortizedCost'],
                                  GroupBy=[{'Type': 'DIMENSION', 'Key': 
  'LINKED_ACCOUNT'}]} ,{'Dimensions': {'Key': 'LINKED_ACCOUNT','Values': 
  ['123948500267568']}}]}, **kwargs)
      for info in data['ResultsByTime']:
         for group in info['Groups']:
              print(group['Keys'][0], info['TimePeriod']['Start'], 
  group['Metrics']['AmortizedCost']['Amount'])#, group['Keys'][1])
      token = data.get('NextPageToken')
      if not token:
          break
  
• Amazon MWS "Access Denied" issue

  I'm new to accessing Amazon's MWS API. I was trying to connect using Boto and received an "Access Denied" error. *On researching I found out that the host value in the connection.py file needs to be changed to marketplace I'm trying to access, which is Canada in my case. I have changed that from 'mws.amazonservices.com' to 'mws.amazonservices.ca' but I still receive the same error. Any help would be greatly appreciated.

  My code is:

  from boto.mws.connection import MWSConnection
  accessKey = "XXXXXXXXXXXXXXXXXXXXXXXXX"
  merchantID = "XXXXXXXXX"
  marketplaceID = "A2EUQ1WTGCTBG2"  # Amazon.ca
  secretKey = "XXXXXXXXXXXXXXXXXXXXXXXX"
  
  mws_test = MWSConnection(accessKey, secretKey)
  mws_test.Merchant = merchantID
  mws_test.SellerId = merchantID
  mws_test.MarketplaceId = marketplaceID
  response = mws_test.list_orders(CreatedAfter='2020-05-09T00:00:00Z', MarketplaceId=[marketplaceID], OrderStatus=['Shipped', 'Unshipped'])
  
• boto3 sqs incorrect url when not specified endpoint url

  Do I always need to specify endpoint_url when creating boto3 client? Why can't I specify QueueUrl as method argument?

  # boto3==1.16.51
  import boto3
  
  
  client = boto3.client('sqs')
  
  messages = client.receive_message(
      QueueUrl='https://sqs.eu-central-1.amazonaws.com/325672072888/event-queue-test',
      WaitTimeSeconds=2,
      MaxNumberOfMessages=1,
      AttributeNames=["All"],
  )
  

  Exception:

  botocore.exceptions.ClientError: An error occurred (InvalidAddress) when calling the ReceiveMessage operation: The address https://eu-central-1.queue.amazonaws.com/ is not valid for this endpoint.

  Seems like it takes default values for sqs queue. But why it does not take value from QueueUrl
• HLS FLAC Audio Stream

  I have a FLAC audio file (24bit/192Kbps) from which I want to create a HLS packaged adaptive bitrate stream, the highest quality stream being the input format, so FLAC (24bit/192Kbps) and the lower format streams being AAC at different bit rates.

  I can do this with AWS MediaConvert or AWS Elastic Transcoder with regard to the AAC outputs but it doesn't support creating the FLAC outputs as far as I can see.

  Is there a reason I shouldn't be trying to do this? Assuming that it is a perfectly valid objective is there another tool/service to do the job or perhaps I need to code something up myself around ffmpeg?
• How to get metadata ( MaxWidth, MaxHeight etc) of preset in AWS elastic trans coding

  Using aws elastic transcoder in out ongong project. i would like get aws elastic transcoder preset id's meta data, about MaxWidth, MaxHeight ete.
• Streaming video to browser via Amazon Elastic Transcoder

  I'm going to stream videos from S3. I know it is simple. I did it by putting presigned URL inside video src attributes. There is no problem. Everything is being displayed. But, if I visit my website via IDM+ app's browser for android, my videos can be downloaded. But I don't want it. So I want to transcode the videos(adding watermark to video, making video partion's extension .ts)*. After that, I think, videos can not be easily downloaded via IDM+(because of multiple video portions).

  How can I display a transcoded video file in the browser? I only found checking job status, creating jobs and etc via amazon elastic transcoder. But nothing about displaying transcoded video in the browser in laravel/php.

  *as I knew, if the video is transcoded, video extension would be .ts or something else. I'm new in the video streaming sphere. Take it into account :) Thank you!

  Technology: Laravel 8, AWS S3, Amazon Elastic Transcoder.

  Thank you in advance.