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• Packing a binary into AWS Lambda for Python

  17 novembre 2016, par Anthony G

  I want to convert m4a files uploaded to S3 to mp3. The files would only be 15 seconds max, so using Elastic Transcoder would be overkill. I downloaded a binary from https://www.johnvansickle.com/ffmpeg/. But I am very new to AWS and im still not sure how uploading binaries works. How would I would include it so that I could convert a file ?

  import boto3
  
  import urllib
  
  
  
  print('Loading function')
  
  
  
  s3 = boto3.client('s3')
  
  
  
  def lambda_handler(event, context):
  
      bucket = event['Records'][0]['s3']['bucket']['name']
  
      key = urllib.unquote_plus(event['Records'][0]['s3']['object']['key'].encode('utf8'))
  
      try:
  
      #convert to mp3
  
      #upload to bucket
  
      except Exception as e:
  
          print(e)
  
          print('Error getting object {} from bucket {}. Make sure they exist and your bucket is in the same region as this function.'.format(key, bucket))
  
          raise e

• checkasm : Test whether the native FFmpeg timers work

  14 décembre 2023, par Martin Storsjö

  checkasm : Test whether the native FFmpeg timers work
  On some platforms (in particular, ARM/AArch64), the implementation
  
  of AV_READ_TIME() may use a privileged instruction - in such
  
  cases, benchmarking just fails with a SIGILL.
  Instead of crashing, try executing AV_READ_TIME() once within
  
  a region with the signal handler active, to allow gracefully
  
  informing the user about the issue.
  This matches the dav1d checkasm commit
  
  95a192549a448b70d9542e840c4e34b60d09b093.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] tests/checkasm/checkasm.c

• Video Stabilization with spin product OpenCV

  28 mars 2021, par a.masri

  I'm trying to stabilize video using OpenCV, but my video is a walkaround 360 spin like this spin, but the stabilize not perfect has a shaking because the optical flow not working perfectly with the spined video

  


  can you find python code here

  


  and I'm trying to use FFmpeg but still, have the same issue,

  


  this command

  


  INPUT=$1
STB_OUTPUT=stb1.mp4

ffmpeg -y -i "$INPUT" -vf vidstabdetect=stepsize=32:shakiness=5:accuracy=15:result="$TRF" -f null -

ffmpeg -y -i "$INPUT" -vf vidstabtransform=input="$TRF":smoothing=30,unsharp=5:5:0.8:3:3:0.4  "$STB_OUTPUT"