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• How to link Eclipse Indigo in Ubuntu 11 to FFMPEG 8 for C++

  16 octobre 2013, par AMB0027

  I have tried everything in the book and EVERYTHING I could find on how to do this and reinstalled and reconfigured and rebuilt several times to no avail. This is what I have. I've made FFMPEG on my Ubuntu VM and have the following code written :

  #include "libavcodec/avcodec.h"
  
  #include "libavformat/avformat.h"
  
  
  
  #include 
  
  #include <iostream>
  
  
  
  using namespace std;
  
  
  
  int main( int argc, char* argv[] ) {
  
  
  
      avcodec_register_all();
  
  
  
      return 0;
  
  }
  
  </iostream>

  This errors and says :

  /home/adam/workspace/MP4 Tools/Debug/../testDriver.cpp:19: undefined reference to     `avcodec_register_all()'
  
  collect2: ld returned 1 exit status

  I have included the libavcodec.a file. Project->Properties->GCC C++ Linker->Libraries->add "avcodec"

  Can anyone think of something I'm not doing or overlooking ? Thanks so much.

• compiling ffmpeg for android some error occured

  11 janvier 2016, par SirTeddy

  im using Ubuntu 14 04 64-bit !

  ffmpeg 2.8.3

  SDL2.0.3

  ndk-version : r10e

  android : android-21

  adt : 23.0.6

  code is from : https://github.com/amikey/AndroidPlayer

  i read README.md and followed those steps

  i didnt run ./configure in ffmpeg or SDL,i tried before and get more faliure.

  some of eclipse console :

  Android NDK: WARNING:jni/ffmpeg/Android.mk:avcodec: LOCAL_LDLIBS is always ignored for static libraries    
  
  jni/ffmpeg/Android_.mk:38: FFLIBS 1 ''
  
  jni/ffmpeg/Android_.mk:39: include jni/ffmpeg/libswscale/Makefile.android
  
  jni/ffmpeg/Android_.mk:42: FFLIBS 2 ''
  
  jni/ffmpeg/Android_.mk:116: ============================================================
  
  jni/ffmpeg/Android_.mk:117: Library name: 'libswscale'
  
  jni/ffmpeg/Android_.mk:118: =============================
  
  jni/ffmpeg/Android_.mk:119: Files that will be compiled: '  alphablend.c gamma.c hscale.c hscale_fast_bilinear.c input.c options.c output.c rgb2rgb.c slice.c swscale.c swscale_unscaled.c utils.c vscale.c yuv2rgb.c'
  
  jni/ffmpeg/Android_.mk:120: =============================
  
  jni/ffmpeg/Android_.mk:121: Libraries that will be included: ''
  
  jni/ffmpeg/Android_.mk:122: ============================================================
  
  jni/ffmpeg/Android_.mk:38: FFLIBS 1 ''
  
  jni/ffmpeg/Android_.mk:39: include jni/ffmpeg/libavutil/Makefile.android
  
  jni/ffmpeg/Android_.mk:42: FFLIBS 2 ''
  
  jni/ffmpeg/Android_.mk:116: ============================================================
  
  jni/ffmpeg/Android_.mk:117: Library name: 'libavutil'
  
  jni/ffmpeg/Android_.mk:118: =============================
  
  jni/ffmpeg/Android_.mk:119: Files that will be compiled: ' arm/float_dsp_neon.S arm/float_dsp_vfp.S adler32.c aes.c arm/cpu.c arm/float_dsp_init_arm.c arm/float_dsp_init_neon.c arm/float_dsp_init_vfp.c audio_fifo.c avstring.c base64.c blowfish.c bprint.c buffer.c camellia.c cast5.c channel_layout.c color_utils.c cpu.c crc.c des.c dict.c display.c downmix_info.c error.c eval.c fifo.c file.c file_open.c fixed_dsp.c float_dsp.c frame.c hash.c hmac.c imgutils.c intmath.c lfg.c lls.c log.c log2_tab.c lzo.c mathematics.c md5.c mem.c murmur3.c opt.c parseutils.c pixdesc.c pixelutils.c random_seed.c rational.c rc4.c reverse.c ripemd.c samplefmt.c sha.c sha512.c stereo3d.c tea.c threadmessage.c time.c timecode.c tree.c twofish.c utils.c xga_font_data.c xtea.c'
  
  jni/ffmpeg/Android_.mk:120: =============================
  
  jni/ffmpeg/Android_.mk:121: Libraries that will be included: ''
  
  jni/ffmpeg/Android_.mk:122: ============================================================
  
  Android NDK: WARNING:jni/ffmpeg/Android.mk:avformat: LOCAL_LDLIBS is always ignored for static libraries    
  
  [armeabi-v7a] Install        : libSDL2.so => libs/armeabi-v7a/libSDL2.so
  
  [armeabi-v7a] Install        : libmain.so => libs/armeabi-v7a/libmain.so
  
  **** Build Finished ****

  and it showed a window :Your project contains error(s)...

  then i find 2 error file

  file 1 :

• How can I overlay a video ontop of background image ?

  19 août 2019, par user11588722

  I have a command which creates waves ontop of a background image :

  ffmpeg -y -i "Assets/Screens/new.png" -i "Temp/video.mp4" -i "Temp/audio.mp3" -filter_complex "[2:a]showwaves=mode=cline:s=255x81:scale=sqrt:colors=0x222222,colorkey=0x000000:0.01:0.1,format=yuva420p[w];[v][w]overlay=240:594,scale=1920:1080[outv]" -map "[outv]" -map 2:a -movflags +faststart -c:v libx264 -c:a aac -preset veryfast -shortest "output.mp4"

  How can I also overlay a 1024x576px video at position 756:252 ?

  I have already included the video file as the second (1:v) input, but I can’t seem to get the filters to play nicely.

  Thanks for any help.