Recherche avancée

Sur d’autres sites (7971)

• How to generate video as fast as possible with subtitles and audio on node.js + ffmpeg ?

  12 septembre 2018, par DSeregin

  Intro :

  We receive from the site some pieces of text
  Pieces arrive to node.js-server

  At the output we need to get a video, merged from all the pieces of text, voiced by the machine voice, with the added subtitles and audio substrate. So that user could be share this video in the social networks. MKV format doesn`t supported by VK.com

  The options that we have tried :
  1. Get all the text at once, generate the entire speech, create a file with subtitles, burn subtitles in the video .mp4 (vk.com does not support the .mkv container). It took 12 seconds of operations for a 45-second video on the local computer.
  2. Generate audio and video files for each piece of text (with added subtitles). It took one second for one piece of text. At the final request, we merge all pieces together. The last request (merging) took 2-3 seconds, which is already bearable.

  The second variant looks acceptable in terms of speed, but if you run 50 clients at the same time, then the computer (tested on a MacBook PRO 2013, 2.4 GHz i7, 8gb 1600 Mhz DDR3, SSD 256gb) processed only 1 piece from 1 client in 60 seconds (60 times slower), then the computer hung tight.

  • Generation of audio is done through Amazon Polly
  • Generate subtitles via https://github.com/gsantiago/subtitle.js#readme
  • From node.js we call ffmpeg using https://github.com/fluent-ffmpeg/node-fluent-ffmpeg
  • Resolution for video - 1280x720

  The commands we used :

  • Burn video subtitles and trim up to conditional 6 seconds (in the code send unix timestamp)

  ffmpeg -i import / back.mov -i export_0 / tmp.srt -scodec mov_text -t 6 export_0 / output.mov

  • Merging all audio

  ffmpeg -i audio1.mp3 .... -i audio15.mp3 merged.mp3

  • Overlay audio-substrate on the text

  ffmpeg -i merged.mp3 -i back.mp3 -filter_complex amerge -ac 2-c: a libmp3lame -q: a 4 -shortest audio.mp3

  • Merging all videos

  ffmpeg -i video.txt -f concat -c copy video.mp4

  • Overlay audio on video

  ffmpeg -i audio.mp3 -i video.mp4 -i test.mp4 -i export / output.mp3 -c: v copy -c: a aac -map 0: v: 0 -map 1: a: 0 -shortest output .mp4

  Questions that torment :

  1. Is it faster ?

  2. Can I use other codecs or methods of gluing without re-encoding ?

  3. Try to call ffmpeg directly without a wrapper ? (in fact, it gives 50-100 ms of speed)

  4. Try not to save to disk, and write data to Stream and have them glue together in the end ?

• Unwrapping Matomo 5.2.0 – Bringing you enhanced security and performance

  25 décembre 2024, par Daniel Crough — Latest Releases

   As we tie a bow on 2024, we’re delighted to share our final gift of the year. Matomo 5.2.0 comes wrapped with new security features, privacy controls, and performance improvements to enhance your analytics experience.

   Enhanced security and privacy controls

  

  We’ve strengthened Matomo’s security framework with several key updates :

  • A new installer timestamp mechanism for on-premise installations creates a secure 72-hour installation window, preventing unauthorised access during setup
  • Enhanced account security features including a “This Wasn’t Me” link in password reset emails and location-based login alerts
  • The new Global List of Query URL parameters feature lets you refine tracking by excluding sensitive or unnecessary parameters from collection

  Tag manager improvements for better efficiency

  

  The Matomo Tag Manager now includes several features to streamline your workflow :

  • New Consent Management Platform (CMP) tags for CookieYes, OneTrust, and Axeptio, simplifying consent tracking implementatio.
  • A new copy feature for containers, tags, and triggers that reduces setup time and ensures consistency across multiple properties
  • Improved management tools for maintaining standardised tracking across websites

  Performance and reliability updates

  We’ve made technical improvements to enhance Matomo’s performance :

  • Full PHP 8.4 compatibility for improved performance and reliability
  • Optimised archiving processes including smarter handling of recent data
  • New recovery options for interrupted archiving processes
  • Specific improvements for TiDB compatibility, enhancing database performance for users of this engine

  Important to note : This release does not require any major database upgrade, making it easier to implement these improvements.

  Looking forward to 2025

  As we prepare to enter a new year, these updates reflect our ongoing commitment to providing privacy-focused analytics. We’re grateful to all our community contributors who have helped make this release possible. Special thanks to the Matomo community for their contributions to this release.

  Ready to explore these new features ? Update to Matomo 5.2.0 today and start the new year with enhanced security, efficiency, and control over your analytics data.

  From all of us at Matomo, thank you for being part of our journey. Here’s to another year of protecting privacy and empowering insights together !

  ---

  For a detailed overview of all changes and improvements, see our complete release notes or join the discussion in our community forums. If you’d like to contribute to making Matomo even better, learn more about getting involved with our open-source project.

• What is an easy way to call a FFmpeg executable compiled for Android from java code ?

  30 mai 2017, par dentex

  I have compiled FFmpeg for Android to suite my needs in terms of codecs, muxers etc.
  Now I have an executable that, from what I understand, should be placed in my project dir under /external//data/data//app_opt. What I have inside app_opt now is :

      .
  
  ├── bin
  
  │   └── ffmpeg
  
  ├── include
  
  │   ├── libavcodec
  
  │   │   ├── avcodec.h
  
  │   │   ├── avfft.h
  
  │   │   ├── dxva2.h
  
  │   │   ├── vaapi.h
  
  │   │   ├── vda.h
  
  │   │   ├── vdpau.h
  
  │   │   ├── version.h
  
  │   │   └── xvmc.h
  
  │   ├── libavdevice
  
  │   │   └── avdevice.h
  
  │   ├── libavfilter
  
  │   │   ├── asrc_abuffer.h
  
  │   │   ├── avcodec.h
  
  │   │   ├── avfiltergraph.h
  
  │   │   ├── avfilter.h
  
  │   │   ├── buffersink.h
  
  │   │   ├── buffersrc.h
  
  │   │   ├── version.h
  
  │   │   └── vsrc_buffer.h
  
  │   ├── libavformat
  
  │   │   ├── avformat.h
  
  │   │   ├── avio.h
  
  │   │   └── version.h
  
  │   ├── libavutil
  
  │   │   ├── adler32.h
  
  │   │   ├── aes.h
  
  │   │   ├── attributes.h
  
  │   │   ├── audioconvert.h
  
  │   │   ├── audio_fifo.h
  
  │   │   ├── avassert.h
  
  │   │   ├── avconfig.h
  
  │   │   ├── avstring.h
  
  │   │   ├── avutil.h
  
  │   │   ├── base64.h
  
  │   │   ├── bprint.h
  
  │   │   ├── bswap.h
  
  │   │   ├── common.h
  
  │   │   ├── cpu.h
  
  │   │   ├── crc.h
  
  │   │   ├── dict.h
  
  │   │   ├── error.h
  
  │   │   ├── eval.h
  
  │   │   ├── fifo.h
  
  │   │   ├── file.h
  
  │   │   ├── imgutils.h
  
  │   │   ├── intfloat.h
  
  │   │   ├── intfloat_readwrite.h
  
  │   │   ├── intreadwrite.h
  
  │   │   ├── lfg.h
  
  │   │   ├── log.h
  
  │   │   ├── lzo.h
  
  │   │   ├── mathematics.h
  
  │   │   ├── md5.h
  
  │   │   ├── mem.h
  
  │   │   ├── opt.h
  
  │   │   ├── parseutils.h
  
  │   │   ├── pixdesc.h
  
  │   │   ├── pixfmt.h
  
  │   │   ├── random_seed.h
  
  │   │   ├── rational.h
  
  │   │   ├── samplefmt.h
  
  │   │   ├── sha.h
  
  │   │   ├── timecode.h
  
  │   │   └── timestamp.h
  
  │   ├── libpostproc
  
  │   │   └── postprocess.h
  
  │   ├── libswresample
  
  │   │   └── swresample.h
  
  │   └── libswscale
  
  │       └── swscale.h
  
  ├── lib
  
  │   ├── libavcodec.a
  
  │   ├── libavdevice.a
  
  │   ├── libavfilter.a
  
  │   ├── libavformat.a
  
  │   ├── libavutil.a
  
  │   ├── libpostproc.a
  
  │   ├── libswresample.a
  
  │   ├── libswscale.a
  
  │   └── pkgconfig
  
  │       ├── libavcodec.pc
  
  │       ├── libavdevice.pc
  
  │       ├── libavfilter.pc
  
  │       ├── libavformat.pc
  
  │       ├── libavutil.pc
  
  │       ├── libpostproc.pc
  
  │       ├── libswresample.pc
  
  │       └── libswscale.pc
  
  └── share
  
      └── ffmpeg
  
          ├── examples
  
          │   ├── decoding_encoding.c
  
          │   ├── filtering_audio.c
  
          │   ├── filtering_video.c
  
          │   ├── Makefile
  
          │   ├── metadata.c
  
          │   └── muxing.c
  
          ├── ffprobe.xsd
  
          ├── libvpx-1080p50_60.ffpreset
  
          ├── libvpx-1080p.ffpreset
  
          ├── libvpx-360p.ffpreset
  
          ├── libvpx-720p50_60.ffpreset
  
          ├── libvpx-720p.ffpreset
  
          ├── libx264-ipod320.ffpreset
  
          └── libx264-ipod640.ffpreset

  Do I need just the ffmpeg under bin to place in my project’s /res/raw dir ?

  And what is the easiest way to call ffmpeg and feed it with a command string ?

  I compiled FFmpeg with limited decoders and demuxers, because I need audio extraction only.

  See : How can I get FFmpeg to locate installed libraries when —sysroot is pointing to another directory ?

  I would use it in background and notify the user in notification bar on completion.

  I know that, here on SO, other similar questions are present, but they are a bit vague or confusing, at least for me. I understand at this point I lack of competences (actually my App is a jigsaw made of java-code-snippets from the Net that work together).

  I’d appreciate some guidance.
  Thanks.