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• how to enable libvorbis codec in ffmpeg windows ? and how convert from .mov to .webm

  22 juillet 2014, par Amey

  I am using ffmpeg-20140717-git-fa6716c-win64-shared latest one and they have mentioned
  — enable-libvirbose .

  but once I run the command to convert .mov to .webm then its saying unknown encoder libvorbis

  I am not able to enable libvorbis in ffmpeg windows.

  what command to enable any codec.

  and I am trying to convert .mov to .webm format with this command

  ffmpeg -i input.mov -codec:v libvpx -quality good -cpu-used 0 -b:v 225k -qmin 10 -qmax 42 -maxrate 300k -bufsize 1000k -threads 2 -vf scale=-1:560 -codec:a libvorbis -b:a 128k -pass 2 -f webm output.webm

  but its having an error of :

  Unable to parse option value "-1" as pixel format
  
  
  
  Error setting option pix_fmt to value -1

  and even in command I added some -pix_fmt value like

  1] -pix_fmt yuv420p
  2] -pix_fmt yuv422p
  and many more but still giving same error as I have mentioned...

  and my .mov file is very high HD file.

  please guide me what to write

  Thank You.

• Running ffmpeg command using shell_exec in php as a background process in windows

  2 octobre 2014, par Vedant Terkar

  I’m trying to convert a video from .mp4 to .flv in php using :

  shell_exec("ffmpeg -i input.mp4 output.flv 1>output.txt 2>&1");

  Also I am taking output of entire process in output.txt file to use it in creation of progress bar in javascript(that’s not the problem here).

  The problem is :
  if video(input.mp4) size is>50Mb then it takes too long to complete shell_exec (>30secs). which hangs the UI unnecessarily.

  So what i want to know is :

  • Is there any way to make shell_exec work together with rest of the script ?

  • I need only to initiate ffmpeg.exe via php script and then php script can terminate.

  • Once the process is initiated javascript will start its magic(at client side).

  So I need to execute shell_exec async. with rest of the script. and once the process is initiated the script should inform client by simply echoing. It should not wait for ffmpeg.exe to complete its working. Is it possible ?

  I’ve seen several similar questions on SO, many of them describing the same problem

  ex :

  Run a ffmpeg process in the background

  Run PHP Task Asynchronously

  ffmpeg Progress Bar - Encoding Percentage in PHP

  Can ffmpeg show a progress bar ?

  etc.

  BUT

  They all were using linux OS’s or Using curl. I’m using windows 8 (wamp without curl and any other add-on except ffmpeg.exe).

  So Is it possible ? can experts here please help me one more time ?

  Thanks in advance.

• build guardianproject's ffmpeg library using android ndk for android on windows

  25 juillet 2014, par Abdul Qadir

  I need to encode/decode audio files to mp3 inside my android project using ffmpeg, but I encounter the error unknown encoder libmp3lame while doing so. On reading the guidelines on the guardianproject’s ffmpeg github page : https://github.com/guardianproject/android-ffmpeg
  I probably need to add --enable-libmp3lame in the configure_ffmpeg.sh file.

  I’m using windows. I’ve cloned the github project. I’ve edited the configure_ffmpeg.sh file. According to the guidelines to build, the following command in cmd is not working probably because I’m on windows
  github-project-root: path-to-ndk\ndk-build configure_make_everything.sh

  I get the following error :

  Android NDK: Could not find application project directory
Android NDK: Please define NDK_PROJECT_PATH variable to point to it
path-to-ndk\build/core/build-local.mk:/148: *** Android NDK: Aborting. Stop.

  I need to enable libmp3lame so I can encode/decode my audio files to mp3 inside my android project. Any help would be appreciated.