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• AWS Lambda and Fluent FFMPEG error "cannot read property "isStream" of undefined"

  29 mai 2021, par Travis Lee

  so here's the goal : convert a .webm file hosted in an S3 into a gif and upload that to a new bucket. This all works fine when run locally, but when trying to translate it into a lambda, fluent-ffmpeg throws errors when it runs the command.

  


  Here's the code snippet :

  


  ffmpeg(new URL(vid))
  .outputOptions("-vf", "scale=320:-1:flags=lanczos,fps=14")
  .on('progress', () => {
      console.log('progress');
  })
  .on('end', () => {
     //Do stuff with the result when it is done
  })
  .output(newKey)
  .run(newKey);


  


  in this snippet, "vid" is a presigned GET url for an S3 bucket containing the .webm video file, and "newKey" is the name of the new bucket (and a temporary writeStream/File that is created in the lambda to store the new .gif file until we upload it to S3 - not super relevant to this issue).

  


  What should happen (and does locally) is that a new output is created containing the converted .gif file

  


  What happens when it is deployed in a lambda is that it reaches the .outputOptions call and throws a type error saying that it cannot read property isStream of undefined.

  


  At first glance, this seems like I simply don't have FFMPEG installed in the lambda, but I do. I have tried with the prebuilt layer using NodeJS 10 found here : https://serverlessrepo.aws.amazon.com/applications/us-east-1/145266761615/ffmpeg-lambda-layer ,
with a NodeJS 12 layer that was built by some engineers here previously, and tried building a NodeJS 14 FFMPEG layer myself and using that. I tried for all three using no configuration and letting it call the PATH ffmpeg, using the FFMPEG_PATH and FFPROBE_PATH environment variables set to either what was specified in the previous layers, or what I made it in the newly built one, and even manually setting the path to the executables using the setFfmpegPath and setFfprobePath functions found on the fluent-ffmpeg object.

  


  Lastly, I even tried bundling the executables in with the actual lambda code itself and uploading it through an S3, trying all three above methods of getting it to point to the correct paths once again to no avail.

  


  I'm seriously in need of help if anyone else has encountered something similar or just might know what is going on. I'm at wit's end here trying to figure this out.

  


• Unable to get the original quality after resizing in ffmpeg

  24 septembre 2018, par Sabha

  I am trying to resize a high res video into 480x ??? and with to maintain aspect ratio and also without losing quality. I wish to maintain the original quality of the video. I tried this command line but it loses quality.

  ffmpeg -i a.mp4 -filter:v scale=480:-1 -c:a copy b.mp4

  I got some filters and options from google search such as -qscale,-sameq etc but it is not working.

  Can you please tell me the exact command ?

  Thanks

  EDIT : I also need to place two videos one below the other and wish to know if there is any such option in ffmpeg coz I cannot find anything on google.

• flutter video_trimmer package error=13, Permission denied

  25 novembre 2020, par SILENMUS

  I changed targetSdk 29 for upload google playstore. ( google targetSdk policy )

  


  Now I got this error

  


  when I click Execute button, phone die immediately

  


  and error message like this

  


  E/FFmpeg ( 9618): java.io.IOException: Cannot run program 
"/data/user/0/myProject/files/ffmpeg": error=13, Permission denied


  


  is there a way to solve this problem ?
( targetSdk 28 was no problem )