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• fatal error：libavcodec/avcodec.h No such file or directory

  23 avril 2018, par Colin0114

  I tried debug ffmpeg on my ubuntu1604 platform, but it always says that it cannot find the headfiles, but actually I did include headfiles in my compiling code.

  here is the error message：
  error message

  here is my test code :

   #include 
  
   #include "libavcodec/avcodec.h"
  
   #include "libavformat/avformat.h"
  
   #include "libswscale/swscale.h"
  
  
  
  int main(int argc, char * argv[]){
  
  av_register_all();
  
  AVFormatContext *pFormatCtx = NULL;
  
  
  
  // Open video file
  
  if (avformat_open_input(&pFormatCtx, argv[1], NULL, NULL) !=0 )
  
      return -1; // Couldn't open file
  
  
  
  // Retrieve stream information
  
  if (avformat_find_stream_info(pFormatCtx, NULL) < 0)
  
      return -1; // Couldn't find stream information
  
  
  
  // Dump information about file onto standard error
  
  av_dump_format(pFormatCtx, 0, argv[1], 0);
  
  
  
  int i;
  
  AVCodecContext *pCodecCtxOrig = NULL;
  
  AVCodecContext *pCodecCtx = NULL;
  
  
  
  // Find the first video stream
  
  int videoStream = -1;
  
  for(i=0; inb_streams; i++)
  
      if (pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO){
  
          videoStream = 1;
  
          break;
  
      }
  
  
  
  if (videoStream == -1)
  
      return -1; // Didn't find a video stream
  
  
  
  // Get a pointer to the codec context for the video stream
  
  pCodecCtx = pFormatCtx->streams[videoStream]->codec;
  
  
  
  AVCodec *pCodec = NULL;
  
  // Find the decoder for the video stream
  
  pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
  
  if (pCodec==NULL){
  
      fprintf(stderr, "Unsupported codec!\n");
  
      return -1; // Codec not found
  
  }   
  
  
  
  // Copy context
  
  pCodecCtx = avcodec_alloc_context3(pCodec);
  
  if (avcodec_copy_context(pCodecCtx, pCodecCtxOrig) !=0 ){
  
      fprintf(stderr, "Couldn't copy codec context");
  
      return -1; // Error copying codec context
  
  }
  
  
  
  // Open codec
  
  if (avcodec_open2(pCodecCtx, pCodec, NULL)<0)
  
      return -1; // Could not open codec
  
  
  
  AVFrame *pFrame = NULL;
  
  // Allocate video fream
  
  pFrame = av_frame_alloc();
  
  
  
  // Allocate an AVFrame structure
  
  AVFrame *pFrameRGB = NULL;
  
  pFrameRGB = av_frame_alloc();
  
  if(pFrameRGB == NULL)
  
      return -1;
  
  }

  and the following is my Makefile

  C++     = gcc
  
  INCLUDE_DIR = ./include
  
  LIB_DIR     = ./lib
  
  BIN_DIR     = ./build/bin
  
  TARGET      = $(BIN_DIR)/mk-screen-caps
  
  
  
  INC_PATH    += -I./ -I$(INCLUDE_DIR)
  
  LIBS        += -lstdc++ -lm -lgcc_s -lgcc -lc
  
  LIBS        += $(LIB_DIR)/libavcodec.a $(LIB_DIR)/libavdevice.a 
  
  $(LIB_DIR)/libavfilter.a 
  
  LIBS        += $(LIB_DIR)/libavformat.a $(LIB_DIR)/libavutil.a 
  
  $(LIB_DIR)/libfdk-aac.a 
  
  LIBS        += $(LIB_DIR)/libmp3lame.a $(LIB_DIR)/libopus.a 
  
  $(LIB_DIR)/libpostproc.a 
  
  LIBS        += $(LIB_DIR)/libswresample.a $(LIB_DIR)/libswscale.a 
  
  $(LIB_DIR)/libx264.a 
  
  LIBS        += $(LIB_DIR)/libx265.a $(LIB_DIR)/libyasm.a
  
  
  
  C++_FLAGS   += -pipe -g -Wall -o0 
  
  
  
  C_FILES     += $(wildcard ./*.c);
  
  CPP_FILES   += $(wildcard ./*.cpp)
  
  HEAD_FILES  += $(wildcard $(INCLUDE_DIR)/*.h)
  
  
  
  C_OBJS=$(C_FILES:.c=.o)
  
  CPP_OBJS=$(CPP_FILES:.cpp=.O)
  
  
  
  all: $(TARGET)
  
  $(TARGET): $(CPP_OBJS)
  
  $(C++)  $(C++_FLAGS) -o $@ $(CPP_FILES) $(LIBS)
  
  
  
  %.o: %.c $(HEAD_FILES)
  
      $(C++) -c $(C_FILES) $(INC_PATH) $< -o $@
  
  %.O: %.cpp $(HEAD_FILES)
  
      $(C++) -c $(CPP_FLAGS) $(INC_PATH) $< -o $@
  
  
  
  clean:
  
      rm -f $(TARGET) $(C_OBJS) $(CPP_OBJS)

  and the following is my directory information :

  mk-screen-caps (parent direcotry)

  —build

  —bin

  —include

  —(needed include files and directories)

  —lib

  —(needed libs)

• FFMPEG MKV Causing Errors in DASH JS

  24 juin 2018, par Mike

  I’m getting the following browser errors (on all browsers) using Dash JS when transcoding and MKV file :

  ERROR DOMException: Failed to read the 'buffered' property from 'SourceBuffer': This SourceBuffer has been removed from the parent media source.

  and...

  dash.all.min.js:26 Uncaught (in promise) DOMException: Failed to load because no supported source was found.

  What’s weird is I have no issues when I transcode a MP4 file. I’m using FFMPEG in conjunction with Bento4 to build MPEG DASH and HLS files for my video player.

  What I did to single out FFMPEG was to transcode a video that gave me errors on my test server on my local machine (which works) and start the Bento4 process on that file. Doing that, I had no issues and everything played just fine.

  I have removed FFMPEG and reinstalled it multiple times and I always get the same result. I’m sure I screwed something up on my server, but for the life of me I can’t seem to figure out where to start with fixing the issue.

  FFMPEG Version

  ffmpeg version N-91321-ge85c608 Copyright (c) 2000-2018 the FFmpeg developers
  
  
  
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  
  
  
  configuration: 
  
  --prefix=/root/ffmpeg_build 
  
  --pkg-config-flags=--static 
  
  --extra-cflags=-I/root/ffmpeg_build/include 
  
  --extra-ldflags=-L/root/ffmpeg_build/lib 
  
  --extra-libs=-lpthread 
  
  --extra-libs=-lm 
  
  --bindir=/root/bin 
  
  --enable-gpl 
  
  --enable-libfdk_aac 
  
  --enable-libfreetype 
  
  --enable-libmp3lame 
  
  --enable-libopus 
  
  --enable-libvorbis 
  
  --enable-libtheora 
  
  --enable-libx264 
  
  --enable-nonfree
  
  libavutil      56. 18.102 / 56. 18.102
  
  libavcodec     58. 20.102 / 58. 20.102
  
  libavformat    58. 17.100 / 58. 17.100
  
  libavdevice    58.  4.101 / 58.  4.101
  
  libavfilter     7. 25.100 /  7. 25.100
  
  libswscale      5.  2.100 /  5.  2.100
  
  libswresample   3.  2.100 /  3.  2.100
  
  libpostproc    55.  2.100 / 55.  2.100

  FFMPEG Command

  ffmpeg 
  
  -i ${DIRECTORY}/${INPUT_FILE} 
  
  -progress ${DIRECTORY}/transcode.log 
  
  -s 1920x1080 
  
  -c:v libx264 
  
  -b:v 3000k 
  
  -c:a aac 
  
  -b:a 32k 
  
  -minrate 3000k 
  
  -maxrate 3000k 
  
  -bufsize 6000k 
  
  -g 96 
  
  -keyint_min 96 
  
  -sc_threshold 0 
  
  -profile:v high 
  
  -flags +cgop 
  
  -movflags faststart 
  
  -preset ultrafast 
  
  -pix_fmt yuv420p 
  
  ${DIRECTORY}/ffmpeg_1920_1080_3000.mp4 &> ${DIRECTORY}/ffmpeg.log

  Also, I get no errors and and if I access the output files directly, they play just fine.

  I’m sure I’m not including all the information needed to troubleshoot this, so let me know if there is better information I can provide.

  What would cause FFMPEG to transcode MP4 and not MKV ?

  EDIT
  One last thing, I converted the MKV to an MP4 then used the above command and it worked. It’s like MP4 to MP4 is fine, but MKV to MP4 is broke.

• Using ffmpeg in node, without using fluent-ffmpeg

  16 mai 2018, par drexdelta

  I am using ffmpeg without using fluent-ffmpeg. I am using ’child_process’ from node.

  First of all I verified how can I pass more than one arguments to the child process command. and I verified it given below code.

  I used copy command like this

  cp vid1.mp4 vid2.mp4

  which successfully copied vid1 into vid2.

  const execFile = require('child_process').execFile;
  
  const child = execFile('cp', ['vid1.mp4', 'vid3.mp4'], (error, stdout, stderr) => {
  
      if (error) {
  
          console.error('stderr: =============================', stderr);
  
          throw error;
  
      }
  
      console.log('stdout: ==========================', stdout);
  
  });
  
  
  
  console.log('here');

  Above code is content of the ’index.js’(default entry point in node). And running this with node . , which copies vid1 into vid3 successfully.

  Now, I want to do watermarking to the given video. For that I am using this tutorial. Currently link to the actual tutorial is broken, you can see it here.

  This is the command that I am using

  ffmpeg -i input.mp4 -i logo.png -filter_complex "overlay=10:10" output.mp4

  Now the same command I am using like this ,

  const execFile = require('child_process').execFile;
  
  
  
  const child = execFile('ffmpeg', ['-i', 'input.mp4' , '-i' , 'logo.png' , '-filter_complex' , '"overlay=10:10"' , 'output.mp4' ], (error, stdout, stderr) => {
  
      if (error) {
  
          console.error('stderr: =============================', stderr);
  
          throw error;
  
      }
  
      console.log('stdout: ==========================', stdout);
  
  });
  
  
  
  console.log('here');

  and I am getting an error , that ,

  No such filter : ’"overlay’ Error initializing complex filters. Invalid
  argument

  /Users/neerpatel/Desktop/testProjects/childProcess/index.js:7
  throw error ;
  ^

  Error : Command failed : ffmpeg -i input.mp4 -i logo.png
  -filter_complex "overlay=10:10" output.mp4

  You can clearly see that the same command that runs in terminal directly, doesn’t work when I pass it in child process. Why does it happen ?

  Moreover, I wanted to add tag ’watermarking’ , but I can’t create tag since my reputation is below 1500. please, someone do it.

  UPDATE :
  I used EXEC , instead of execFile . and it worked like charm, but parent file kept waiting for child process. Child process never returns END signal. and this is my code.

  const exec = require('child_process').exec;
  
  
  
  const child = exec('ffmpeg -i input.mp4 -i logo.png -filter_complex "overlay=10:10" output.mp4', (error, stdout, stderr) => {
  
      if (error) {
  
          console.error('stderr: =============================', stderr);
  
          throw error;
  
      }
  
      console.log('stdout: ==========================', stdout);
  
  });
  
  
  
  console.log('here');