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• Rails 5 - Concurrent large Video uploads using Carrierwave eats up the server memory/space

  22 mars 2020, par Milind

  I have a working Rails 5 apps using Reactjs for frontend and React dropzone uploader to upload video files using carrierwave.

  So far, what is working great is listed below -

  1. User can upload videos and videos are encoded based on the selection made by user - HLS or MPEG-DASH for online streaming.
  2. Once the video is uploaded on the server, it starts streaming it by :-
     • FIRST,copying video on /tmp folder.
     • Running a bash script that uses ffmpeg to transcode uploaded video using predefined commands to produce new fragments of videos inside /tmp folder.
     • Once the background job is done, all the videos are uploaded on AWS S3, which is how the default carrierwave works
  3. So, when multiple videos are uploaded, they are all copied in /tmp folder and then transcoded and eventually uploaded to S3.

  My questions, where i am looking some help are listed below -

  1- The above process is good for small videos, BUT what if there are many concurrent users uploading 2GB of videos ? I know this will kill my server as my /tmp folder will keep on increasing and consume all the memory, making it to die hard.How can I allow concurrent videos to upload videos without effecting my server’s memory consumption ?

  2- Is there a way where I can directly upload the videos on AWS-S3 first, and then use one more proxy server/child application to encode videos from S3, download it to the child server, convert it and again upload it to the destination ? but this is almost the same but doing it on cloud, where memory consumption can be on-demand but will be not cost-effective.

  3- Is there some easy and cost-effective way by which I can upload large videos, transcode them and upload it to AWS S3, without effecting my server memory. Am i missing some technical architecture here.

  4- How Youtube/Netflix works, I know they do the same thing in a smart way but can someone help me to improve this ?

  Thanks in advance.

• Installing FFMPEG via WHM Terminal (VPS Server)

  22 juillet 2020, par Alien Joe

  I apologize in advance if any necessary information is missing. Please don't hesitate to comment if I've made any noob mistakes.

  


  What I'm trying to do is install FFMPEG on our VPS following the instructions here : https://stackposts.com/docs/detail/21747459/installating-ffmpeg

  


  I am getting hung up after step 3 - all commands being executed from the Terminal linked inside of our WHM as the root user. I'm getting a permission denied error at step 4, and then errors on every step thereafter if I try to skip it.

  


  I did notice in the course of trying to ad-hoc the install based on other tutorials that the ffmpeg-3.3.4 directory for some reason belongs to another user NOT root. I'm not sure what part of steps 1-3 would have caused this to happen. There may be something there.

  


  I'm hoping someone has run into similar issues and can provide some direction. I've been at it all morning searching for ways to complete this install. I've checked the source file's site, I've reached out to my host, I've reached out to the software support, and I'm reaching out here.

  


  I've accomplished the FFMPEG file downloads - how to I proceed with install ?

  


• Merge pull request #168 from EvanHahn/patch-1

  30 mai 2013, par JamesMGreene

  Merge pull request #168 from EvanHahn/patch-1
  README shouldn't have special Git aliases (`co` instead of `checkout`). Closes PR #168.