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• /usr/include/time.h:243:29 : error : expected identifier or ‘(’ before ‘__const’ [duplicate]

  27 novembre 2019, par user12408787

  This question already has an answer here :

  • FFmpeg : building example C codes
    
    1 answer
    

  When I used gcc to compile program，I meet this error messages，and i have searched answers online，but can not find any results，so I want to ask how to fix this？

• Audio alternative to FFmpeg - Core Audio IOS

  9 juin 2021, par cs guy

  I have been using FFmpeg Android for a music app I'm working on. I built a custom audio engine from stratch with C++ and FFmpeg and it works amazing and it fulfilled all my needs. However, Due to FFmpeg being Lgpl lisence, it seems to me after some researching it is not possible to use a lgpl lisence due to app stores policy. Im not a lawyer or have the money to hire a lawyer for a commercial advise. So I am thinking to replace ffmpeg with another audio decoder, processor library. I am planning to feed the custom decoded data to audio devices through Apples core audio library.

  


  Here are my needs :

  


  

  • Need to decode ogg files

  


  • Need to encode pcm data as aac file

  


  • Need to add post process FX to decoded data such as low pass filter etc

  


  


  So what I am asking for is an answer to one of the following :

  


  

  • Could FFmpeg really not be used in app store due to lgpl static linking issues ? (I looked at the most famous apps that use FFmpeg on Android, all of them does not use FFmpeg on IOS)

  


  • If I were to use another library for FFmpeg what is the best alternative to work with ? Did anyone actually had experienced the same situation that I am in ?

  


  


  I also tried using AudioKit but it has a critical problem that does not meet with my requirement so I dropped it.

  


  I am looking for advice here. Thanks !

  


• ffmpeg converting video to images while video file is being written

  15 octobre 2015, par user3398227

  Hopefully an easy question for an ffmpeg expert !

  I’m currently converting large (+6GB) mpeg video into an image sequence - which is working well using the below ffmpeg command :

  ffmpeg -i "input.mpeg" -vf - fps=fps=2 -f image2 -qscale 1 -s 1026x768 "output%6d.jpg"

  however i have to wait for the file to finish being written to disk before i kick off ffmpeg - but this takes a good hour or so to finish writing, but what i’ve noticed is that ffmpeg can start reading the file while its being written to disk - the only snag here is it gets to the end of the file and stops before the file has finished being written...

  Question is, is there a way that ffmpeg can convert to an image sequence at the same pace the video is being written (and not exit out ?)... or know to wait for the next frame to be written from the source. (unfortunately the input doesn’t support streaming, I only get a network drive and file to work off.. ) I thought i read somewhere that ffmpeg can process at the video frame rate but cant seem to find this command for love or money in the doco !!

  Thanks !