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• ffmpeg convert 4K file to 1080p mp4 file

  16 septembre 2015, par Hüseyin GÖZE

  i’m using ffmpeg to converting video in windows service, when i’m trying to converting 4K video to 1080p ffmpeg returns error like this :

  libvo_aacenc Stream mapping : Stream #0:0 -> #0:0 (h264 (native) ->
  h264 (libx264)) Stream #0:2 -> #0:1 (ac3 (native) -> aac
  (libvo_aacenc)) Error while opening encoder for output stream #0:1 -
  maybe incorrect parameters such as bit_rate, rate, width or height

  my ffmpeg convert command like this :

  ffmpeg -i 4k2.mp4 -vf scale=1920:1080 -threads 3 4k2_1080.mp4

  what’s wrong with this ?

• x264 Building error - Android

  21 avril 2016, par Jay Parikh

  I am using this repository to build ffmpeg static library which includes x264,libpng and others, please
  visit this link https://github.com/writingminds/ffmpeg-android

  i am using windows 7 as host and ubuntu 15.10 (_64) as guest os using VMware Workstation 12
  and
  Android-ndk-r11b-linux-x86_64

  i do have Prebuilt libraries , but now i want it without PIE support

  i am getting this error in config.log in x264 folder while building
  through

  ./android_build.sh

  here is the log :

  x264 configure script
  
  Command line options: "--cross-prefix=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/arm-linux 
  
  /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-gcc 
  
  
  
  checking whether /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-gcc 
  
  
  
  --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot works... no
  
  
  
   Failed commandline was:
  
  
  
  --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot conftest.c  -Wall -I. -I$(SRCPATH) --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot    --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot -lm -o conftest
  
  
  
  /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: fatal error:
  
  
  
  conftest: Input/output error
  
  
  
  Failed program was: 
  
  
  
  int main (void) {  return 0; }
  
  
  
  DIED: No working C compiler found.

  ushare is my shared folder between windows and ubuntu

  I have spend almost a week ,trying to solve every error i get.
  these errors are like never ending , 1 solution give 10 more errors
  i have researched a LOT for this library

  thanks a lot in advance.

  Also i thought that x264 library might have poroblem ,so i tried to disable it
  but next library "libpng" also had Same log Error

  i think problem is in Input/output error (obviously)
  this line in log kind of confuses me (those /../../)

  /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld : fatal error :

  its like two folder overlaping address...

  thanks a lot in advance.
  please don’t go harsh on me ,its my first time,all thanks to this thing...

• Visual Studio can't detect FFmpeg

  19 avril 2023, par Jonathan

  I'm using Visual Studio Community 2022 for a Python 3 project that involves using FFmpeg. However, when I try to run my code, I get the following error message :

  


  RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work


  


  I have FFmpeg installed and added to my PATH, but it still doesn't seem to be working. Here are the steps I've taken so far to try to fix this :

  


  


  1. I tried installing the FFmpeg pip package, but it didn't change anything.

     


  


  2. I searched for solutions on sites like learn.microsoft.com and
stackoverflow.com, but I haven't been able to find anything that works for me. This question also didn't answer my question

     


  


  3. I also asked for help in Visual Studio Code, but I wasn't able to find a solution there either.

     


  


  


  I would appreciate any guidance on how to fix this issue. Thank you !