Recherche avancée

Sur d’autres sites (8949)

• avutil/avutil : make AV_TIME_BASE_Q available in C++

  18 septembre 2023, par Zhao Zhili

  avutil/avutil : make AV_TIME_BASE_Q available in C++
  ISO C++ forbids compound-literals. It's not available with MSVC.
  
  This is a known issue from 10 years ago, and that's why there is a
  
  av_get_time_base_q().
  Since we have no plan to remove AV_TIME_BASE_Q, just make it
  
  available in C++.
  There are multiple choices :
  
  1. Use C++11 syntax : AVRational1, AV_TIME_BASE
  Users may still use C++98 to write new code. So no.
  2. Use av_get_time_base_q().
  It's for this purpose. But it's not compile time constants as
  
  AV_TIME_BASE_Q in C.
  So I choose av_make_q() as Anton's suggestion.
  https://libav-devel.libav.narkive.com/ZQCWfTun/patch-0-2-fix-avutil-h-usage-from-c
  
  Signed-off-by : Zhao Zhili <zhilizhao@tencent.com>
  

  • [DH] doc/APIchanges
  • [DH] libavutil/avutil.h
  • [DH] libavutil/version.h

• What is the Best Approach for Storing and Displaying Video Files as Base64 in HTML for High Performance and Efficiency ? [closed]

  25 août 2023, par Barthez

  I'm currently working on a project where I need to allow users to upload videos, which will then be converted to Base64 and embedded within an HTML file. I'm reaching out to gain a better understanding of the best practices for accomplishing this task while adhering to Stack Overflow guidelines.Here's my plan so far:Video Upload : Users will be able to upload videos through a web interface.Conversion to Base64 : The uploaded video will be converted to Base64 using [specific library/tool].Embedding in HTML : The Base64 encoded video will be embedded within an HTML file using the tag.Before I proceed, I have a few questions:Are there any particular libraries or tools you recommend for converting videos to Base64 efficiently ?What are the potential performance implications of embedding Base64 videos in HTML files, especially considering large video files ?Are there any security concerns I should be aware of when implementing this process ?How can I ensure cross-browser compatibility when embedding these Base64 videos ?Are there any alternatives to this approach that might be more efficient or manageable ?I want to make sure I'm following best practices and avoiding any pitfalls, so any insights, tips would be greatly appreciated. Thank you for your time and assistance !

  


  I attempted to convert an uploaded video to Base64 and embed it within an HTML file.

  


• How do I convert a .wav file to 16bit 44.1kz using ffmpeg or other utility [closed]

  26 mai 2023, par Seth Edwards

  A preface :
I am building an environment for a my own streaming box. Since building the UI. I turned to the now obsolete MSNTV box to find its UI sound effects.

  


  I found the dump on GitHub. I downloaded and located where the sounds where located.

  


  I listened to them one by one. I noticed that they are wave files. But they sound like they were low quality and may have been compressed before being turned into a wave file.

  


  I was using the Apple Files app on an iPhone 6s running iOS 15.7.1.

  


  They play back fine.

  


  I try importing them into GarageBand for iOS and it gives me an error saying that it only allows 16bit 44.1khz files. This confirmed my suspicion of it being low quality.

  


  I then tried playing them on a Dell Chromebook 3100 running ChromeOS. Chrome’s player would also not play the files.

  


  I need to find out how to convert them to 16bit 44.1khz wave files.

  


  My guess is that since the MSNTV had a small amount of storage space that they compressed the audio.

  


  I tried converting the files to mp3. And they are Noticeably worse.

  


  Does anyone know how to convert these files so they can be played back normally.

  


  In the end I plan to use these files and play them using the pygame library.

  


  I have tried changing the metadata

  


  Converting to mp3