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• How to "extend" aws docker base image (.net core from scratch) by ... libs/ubuntu/ffmpeg ?

  26 avril 2022, par Nigrimmist

  i would like to use AWS Lambda through the image containers using .net core 3.1 and it is works fine for me in simplest code case. But i stucked with next scenario :

  


  By default, aws provide base image with .net core with aws libs based on "from scratch". So as i know, it minimal Linux that does not contains even package manager.

  


  I need to work with ffmpeg in the code, but to do it i need to install few packages and ... fmpeg. I have working code on image

  


  FROM mcr.microsoft.com/dotnet/runtime:3.1-bionic


  


  It is ubuntu with .net core runtime. But what is the right strategic in case of AWS Lambda image ? How can i ... merge them ?.

  


  Have few ideas, but not sure :

  


  

  1. use as is FROM public.ecr.aws/lambda/dotnet:core3.1 and try to install package manager, all depenendencies to use ffmpeg and so on ?

  


  2. Use mcr.microsoft.com/dotnet/runtime:3.1-bionic, somehow add required by amazon dependencies (how ? download content and attach from local ?) and configure it to run in Lambda runtime ?

  


  3. ... ?

  


  


  Will be glad to hear where is the solution here. Thanks !

  


• Run an .exe with asp.net core and Azure

  14 juin 2022, par Gaetano Lenoci

  I'm writing an API that encode a video using ffmpeg.exe uploaded from users. To do this I just put the FFmpeg into a folder on my server :

  


  C:\home\site\wwwroot\ffmpeg


  


  This works fine with a single user. But if I try to upload and encode two or more video at the same time, something goes wrong and the backend crash. Probably because two or more processes are trying to use ffmpeg.exe at same time.

  


  My question is : Is this an wrong approach ? I'm using Azure as platform, I need to encode videos using ffmpeg. So what's the best practice ?

  


  Thanks !

  


• NodeJS ffmpeg ytdl-core error write EPIPE

  9 juillet 2023, par daraem

  When trying to merge audio and video from ytdl-core with ffmpeg, it gives me the error : error write EPIPE

  


          res.header("Content-Disposition", `attachment;  filename=video.mp4`)

        let video = ytdl(link, {
            filter: 'videoonly'
        })
        let audio = ytdl(link, {
            filter: 'audioonly',
            highWaterMark: 1 << 25
        });
        const ffmpegProcess = cp.spawn(ffmpeg, [
            '-i', `pipe:3`,
            '-i', `pipe:4`,
            '-map', '1:0',
            '-map', '0:0',
            '-strict', 'experimental',
            '-vcodec', 'libx264',
            '-c:v', 'libx264',
            '-c:a', 'aac',
            '-crf', '27',
            '-preset', 'veryfast',
            '-b:v', '1500k',
            '-b:a', '128k',
            '-movflags', 'faststart',
            '-f', 'mp4',
            '-loglevel', 'error',
            '-',
        ], {
            stdio: [
                'pipe', 'pipe', 'pipe', 'pipe', 'pipe',
            ],
        });

    
        video.pipe(ffmpegProcess.stdio[3]);
        audio.pipe(ffmpegProcess.stdio[4]);
        ffmpegProcess.stdio[1].pipe(res);


  


  I've tried executing the code with a file output and without "ffmpegProcess.stdio[1].pipe(res) ;" and it works. But I need that line of code for chrome extension purposes. I've also tried moving around "-movflag" tag and when its accompained with "frag_keyframe" it works but with a wrong video duration.