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• Get "Delay relative to video" value using ffmpeg

  22 avril 2023, par user3449922

  I like to known if is possible detect via ffmpeg the value of property "Delay relative to video" showed here :

  


  Audio #2
ID                                       : 3
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 10 min 0 s
Bit rate mode                            : Constant
Bit rate                                 : 320 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Bit depth                                : 32 bits
Compression mode                         : Lossy
Delay relative to video                  : 1 s 78 ms
Stream size                              : 22.8 MiB (1%)
Language                                 : rom
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No


  


  Thank you !

  


• FFMpeg - Issue with slicing QT videos

  24 juin 2016, par gkmspl

  We use ffmpeg in one of our applications to slice videos. While it’s working fine for slicing PAL videos, it is not working for QT videos... Here’s the command we use :

  ffmpeg.exe -i "input.mp4" ss startTime -c copy -to stopTime -y "output.mp4"

  Throws an error - "[mp4 @ 0515c240] Could not find tag for codec pcm_s16le in stream #1, codec not currently supported in container"

  The input videos are created by a solid state digital video recording system which records videos from following Input channels :
  6 channels of videos input (DVI-4No.s, PAL-2No.s)
  2 channels of audio input (Left & Right)
  2 channels of MIL STD 1553B bus data
  2 channels of RS422 data

  What could be the issue & how can it be resolved ?

• Unable to instal ffmpeg on CircleCi 2.0

  15 novembre 2017, par Mateusz Urbański

  I have Ruby on Rails project which uses CircleCi to run tests. In the past I was using CircleCi 1.0 but now I migrated to CircleCi 2.0. I have problem with installing ffmpeg. CircleCi 2.0 uses Ubuntu 14.04. I install ffmpeg like this :

  # ffmpeg installation
  
  sudo add-apt-repository ppa:mc3man/trusty-media -y
  
  sudo apt-get update
  
  sudo apt-get install ffmpeg

  and my circle.yml config file looks like this :

  version: 2
  
  environment:
  
    TZ: "/usr/share/zoneinfo/America/Los_Angeles"
  
  
  
  jobs:
  
    build:
  
      parallelism: 2
  
      working_directory: ~/circleci-survey-builder
  
      docker:
  
        - image: circleci/ruby:2.4.1-node
  
          environment:
  
            PGHOST: 127.0.0.1
  
            PGUSER: ubuntu
  
            RAILS_ENV: test
  
        - image: circleci/postgres:9.6-alpine
  
          environment:
  
            POSTGRES_USER: ubuntu
  
            POSTGRES_DB: circle_test
  
            POSTGRES_PASSWORD: ''
  
      steps:
  
        - checkout
  
  
  
        - run:
  
            name: 'Install CircleCI dependencies'
  
            command: bash deploy/circle-dependencies.sh
  
  
  
        - type: cache-restore
  
          key: dashboard-{{ checksum "Gemfile.lock" }}
  
  
  
        - run:
  
            name: 'Install gems'
  
            command: bundle install --path vendor/bundle
  
  
  
        - type: cache-save
  
          key: dashboard-{{ checksum "Gemfile.lock" }}
  
          paths:
  
            - vendor/bundle
  
  
  
        - run:
  
            name: 'Install postgresql-client'
  
            command: sudo apt install postgresql-client
  
  
  
        - run:
  
            name: 'Create database.yml'
  
            command: mv config/database.ci.yml config/database.yml
  
  
  
        - run:
  
            name: Set up SurveyBuilder database
  
            command: bundle exec rake db:structure:load --trace
  
  
  
        - run:
  
            name: 'Run tests'
  
            command: |
  
              bundle exec rspec spec

  It returns following error when I run build on CircleCi :

  #!/bin/bash -eo pipefail
  
  bash deploy/circle-dependencies.sh
  
  
  
  Fetching: bundler-1.16.0.gem (100%)
  
  Successfully installed bundler-1.16.0
  
  1 gem installed
  
  sudo: add-apt-repository: command not found
  
  
  
  
  
  Ign http://deb.debian.org jessie InRelease
  
  
  
  Get:1 http://deb.debian.org jessie-updates InRelease [145 kB]
  
  
  
  10% [1 InRelease 13.8 kB/145 kB 10%] [Waiting for headers] [Connecting to securHit http://deb.debian.org jessie Release.gpg
  
  
  
  Hit http://deb.debian.org jessie Release
  
  
  
  Get:2 http://deb.debian.org jessie-updates/main amd64 Packages [23.2 kB]
  
  
  
  Get:3 http://deb.debian.org jessie/main amd64 Packages [9063 kB]
  
  
  
  Get:4 http://security.debian.org jessie/updates InRelease [63.1 kB]
  
  
  
  Get:5 http://security.debian.org jessie/updates/main amd64 Packages [610 kB]
  
  
  
  100% [3 Packages 9063 kB]100% [3 Packages 9063 kB]Fetched 9904 kB in 1s (8178 kB/s)
  
  
  
  Reading package lists... 1%
  
  Reading package lists... 61%
  
  Reading package lists... Done
  
  
  
  
  
  Reading package lists... 1%
  
  Reading package lists... Done
  
  
  
  
  
  Building dependency tree... 0%
  
  Building dependency tree       
  
  
  
  
  
  Reading state information... Done
  
  
  
  Package ffmpeg is not available, but is referred to by another package.
  
  This may mean that the package is missing, has been obsoleted, or
  
  is only available from another source
  
  
  
  E: Package 'ffmpeg' has no installation candidate
  
  Exited with code 100

  How can I fix that ?