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• Amazon Alexa Audio Encoding- Few audios are not playing [closed]

  3 mars 2023, par Vijayanath Viswanathan

  I am encoding audio for Alexa audio using ffmpeg like below,

  



  ffmpeg -i  -ac 2 -codec:a libmp3lame -b:a 48k -ar 16000 


  



  The problem is few of the audios are playing properly but few are not. I am using same Project Rate and Quality (Project Rate 16000 and Quality to 48 kbps) for all audios which needs to be converted. Anybody knows is there any basic quality for source.mp3 to encode to Project Rate 16000 and Quality to 48 kbps ?

  



  The response I am getting from alexa for faulty file is, "There is a problem with skill response".

  


• Best practices for developing scalable video transcoding server on Amazon Web Services ?

  6 septembre 2016, par undefined

  What do people think are the most important issues when developing an application that is going to allow users to upload video and images to a server and have them transcoded by FFMPEG and stored in amazon S3 ? I have a couple of options ;

  1) install FFMPEG on the same server that handles file uploads, when a video is uploaded and stored on EC2 instance, call FFMPEG to convert it then when done, write the file to S3 bucket and dispose of the original.

  How scalable is this ? What happens when many users upload at the same time ? How do I manage multiple processes at once ? How do I know when to start another instance and load balance this configuration ?

  2) Have one server for processing uploads (updating database, renaming files etc) and one server for doing transcoding. Again what is the best way to manage multiple processes ? should I be looking at Amazon SQS for this ? Can I tell the transcoding server to get the file from the upload server or should I copy the file to the transcoding server ? Should I just store all files on S3 and SQS can read from there. I am trying to have as little traffic as possible.

  I am running a linux box as the upload server and have FFMPEG running on this.

  Any advice on best practices for setting up such a configuration would be appreciated. Many thanks

• ffplay is not getting compiled on Amazon EC2

  12 septembre 2017, par Durgesh

  Asking this question as similar questions of stackoverflow didn’t help me.

  I wanted to install ffplay tool on my Amazon EC2 (Linux) instance. I have cloned the code from FFmpeg’s official git repository.

  executed ./configure and make. After these commands, there was no ffplay binary created. Only ffmpeg, ffprobe and ffserver binaries were generated.

  Later tried with executing ’./configure —enable-ffplay’ as suggested in few posts of web. Even this didn’t work. Also i did not found any static binaries of ffplay which i could use for my testing

  Can anyone suggest what was wrong with my build procedure ?