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• ffmpeg crashing server working with fpm-php

  1er janvier 2023, par John

  I'm running a wordpress bitnami stack consisting of apache, mariadb and fpm-php.
I have cron jobs fulfilling encoding of one video at a time using ffmpeg, so while fpm-php is serving http requests ffmpeg works in parallel encoding videos.
When encoding starts everything seems to work fine, as shown here :

  


  But eventually after around an hour the server crashes due to lack of memory space. I've read that when CPU can't handle ffmpeg, ffmpeg will start consuming RAM until it exhausts it so that might be what causes the sudden spike in memory usage.

  


  The image bellow illustrates what happens when the server crashes, kswapd0 creates virtual memory out of disk space to cope with lack of memory :


  


  The server has 4vCPU and 8GB RAM. Website traffic is just me and a colleague, so it should be able to handle ffmpeg taking up around 1vCPU to encode videos.

  


  I use the following configuration for fpm-php :

  


  pm=ondemand
pm.max_children=5
pm.start_servers=2
pm.min_spare_servers=1
pm.max_spare_servers=3
pm.max_requests = 500


  


  Has anyone had this issue before ?

  


  Thank you.

  


  I've tried changing around the configuration of fpm-php, but the issue still happens. I don't see how ffpmeg can crash the server when it's taking up about 25% of the CPU only, when there's no traffic to the server.

  


• FFmpeg - filter-chaining and mapping output

  15 décembre 2022, par o_ren

  In FFmpeg, is it possible to map an output from the middle of a filter chain ?

  


  For example, in this command :

  


  ffmpeg -f lavfi -i smptehdbars=rate=25:size=1920x1080 -filter_complex "[0:v]drawtext=text=text1:x=100/2:y=100:fontsize=50[txt1];[txt1]drawtext=text=text2:x=200/2:y=200:fontsize=50[txt2];[txt2]drawtext=text=text3:x=300/2:y=300:fontsize=50[txt3];[txt3]drawtext=text=text4:x=400/2:y=400:fontsize=50[txt4]" -map "[txt4]" -t 10 -y ~/Desktop/mapping.mp4


  


  This works : -map "[txt4]".
When trying -map "[txt3]" (or txt2, or txt1) I get "

  


  


  Output with label 'txt3' does not exist in any defined filter graph,
or was already used elsewhere."

  


  


  Thanks

  


• How to debug GitHub Action failure

  9 décembre 2022, par Meltemi

  Just yesterday a stable GitHub Action (CI) started failing rather cryptically and I've run out of tools to debug it.

  


  All I can think of is our BUNDLE_ACCESS_TOKEN went bad somehow but I didn't set that up. It's an Action secret under Repository Secrets that are not visible in GitHub UI. How can I test to see if it's valid ?

  


  Or maybe it's something else ?!? "Bad credentials" is vague...

  


  Here's the meat of the action we're trying to run :

  


  #my_tests.yml
jobs:
  my-test:
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres:13.4
        env:
          POSTGRES_USERNAME: postgres
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: myapp_test
        ports:
          - 5432:5432
        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
    env:
      RAILS_ENV: test
      POSTGRES_HOST: localhost
      POSTGRES_USERNAME: pg
      POSTGRES_PASSWORD: pg
      GITHUB_TOKEN: ${{ secrets.BUNDLE_ACCESS_TOKEN }}
      BUNDLE_GITHUB__COM: x-access-token:${{ secrets.BUNDLE_ACCESS_TOKEN }}
      CUCUMBER_FORMAT: progress
    steps:
      - uses: actions/checkout@v2
      - uses: FedericoCarboni/setup-ffmpeg@v1
      ...


  


  And with debug turned on here's the Failure (line 20) from GitHub Actions :

  


  Run FedericoCarboni/setup-ffmpeg@v1

1 ------- ##[debug]Evaluating condition for step: 'Run FedericoCarboni/setup-ffmpeg@v1'
2 ##[debug]Evaluating: success()
3 ##[debug]Evaluating success:
4 ##[debug]=> true
5 ##[debug]Result: true
6 ##[debug]Starting: Run FedericoCarboni/setup-ffmpeg@v1
7 ##[debug]Loading inputs
8 ##[debug]Loading env
9 Run FedericoCarboni/setup-ffmpeg@v1
10   with:
11   env:
12     RAILS_ENV: test
13     POSTGRES_HOST: localhost
14     POSTGRES_USERNAME: pg
15     POSTGRES_PASSWORD: pg
16     GITHUB_TOKEN: ***
17     BUNDLE_GITHUB__COM: x-access-token:***
19     CUCUMBER_FORMAT: progress
20 Error: Bad credentials
21 ##[debug]Node Action run completed with exit code 1
22 ##[debug]Finishing: Run FedericoCarboni/setup-ffmpeg@v1


  


  Thanks for any help.