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• Windows FFMPEG will not find my files at all [migrated]

  22 mars 2014, par user2441247

  I have a folder full of images that go from 0 to whatever number, and I need to turn these images to a video. They are all .PNG files. Here is my command I am using :

  ffmpeg.exe -f image2 -framerate 30 -pattern_type sequence -start_number 1 -r 30 -i "img%%04d.jpg" -s 1280x720 test.avi

  When I run this I get this error :

  [image2 @ 002be580] Could find no file with path 'img%04d.jpg' and index in the range 1-5
  
  
  
  img%04d.jpg: No such file or directory

  What can I change to get this to work ?

• Qt C++ ffmpeg cannot find library

  7 juin 2013, par Carnifrex

  I use Qt 5.0.2 with Mingw 4.7 on windows.

  I'm working on a c++ program and i'm trying to get the duration of video files. I found ffmpeg. Now i tried to compile a simple program but I think it fails with the libraries. I've tried to include both the shared and dev but they both will fail. ( Zeranoe FFmpeg builds)

  This is my pro file :

  TEMPLATE = app
  
  CONFIG += console
  
  CONFIG -= app_bundle
  
  CONFIG -= qt
  
  
  
  SOURCES += main.cpp
  
  
  
  INCLUDEPATH += C:\programming\ffmpeg-20130606-git--win32-shared\bin
  
  
  
  LIBS += -LC:\programming\ffmpeg-20130606-git--win32-shared\bin -lavcodec-55.dll -     lavformat-55.dll -lavutil-52.dll

  i get errors like :

  " :-1 : error : cannot find -lavcodec-55.dll"

  " :-1 : error : cannot find -lavformat-55.dll"

  I've also tried :

  INCLUDEPATH += C:\programming\ffmpeg-20130606-git--win32-dev\include
  
  INCLUDEPATH += C:\programming\ffmpeg-20130606-git--win32-dev\lib
  
  
  
  LIBS += -LC:\programming\ffmpeg-20130606-git--win32-dev\lib -lavcodec -lavformat -lavutil
  
  
  
  LIBS += -LC:\programming\ffmpeg-20130606-git--win32-dev\lib -llibavcodec.dll.a -llibavformat.dll.a -llibavutil.dll.a

  Here it gives a error "During startup program exited with code 0x0000135'

  I even tried to include each library individually. But no results..

  This is my main file :

  #include <iostream>
  
  using namespace std;
  
  extern "C" {
  
    #include <libavcodec></libavcodec>avcodec.h>    // required headers
  
    #include <libavformat></libavformat>avformat.h>
  
  }
  
  int main(int argc, char**argv) {
  
     av_register_all();             // offending library call
  
     return 0;
  
  }
  
  </iostream>

  A program simple as this will have 2 outcomes :

  1. the program runs but crashes if i call 'av_register_all()'
  2. It just tells me he cannot find the libraries.

  Can someone tell me what it is i'm doing wrong ? Or even give me a hint ? I can't really find a lot of good documentation on this one.

  Thanks in advance !

• How do I use find and ffmpeg to batch convert a bunch of .flac files to .mp3 ?

  30 avril 2019, par Keith

  I have a directory with a bunch of .flac files that I need to convert to .mp3. I plan to use ffmpeg from the command line to do the conversions and I’d like to avoid doing this manually for every file. I’m familiar with the find command but I’m having difficulty using it with ffmpeg which requires both input and output filenames. I imagine using something like

  find . -name "*.flac" -exec ffmpeg -i {}.flac {}.mp3 +

  But of course this doesn’t work. For one thing it fails to strip prefixes and suffixes from the filename being passed to ffmpeg.

  Please also note that the filenames include whitespace so the solution has to ignore whitespace successfully. I’m also on OS X having built ffmpeg with homebrew.