Fatal error: libavcodec / avcodec.h no such file or directory compilation completed

Question

I am trying to execute tutorial01.c using gcc and I have gcc and tutorial01.c in the same folder along with libavcodec and libavformat and related files, this gives me this error

fatal error: libavcodec / avcodec.h no such file or directory compilation completed

when i run gcc -o tutorial01 tutorial01.c -lavformat -lavcodec -lz via terminal in ubuntu 12.04

code

 #include libavcodec/avcodec.h #include libavformat/avformat.h #include stdio.h void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame) { FILE *pFile; char szFilename[32]; int y; // Open file sprintf(szFilename, "frame%d.ppm", iFrame); pFile=fopen(szFilename, "wb"); if(pFile==NULL) return; // Write header fprintf(pFile, "P6\n%d %d\n255\n", width, height); // Write pixel data for(y=0; y<height; y++) fwrite(pFrame->data[0]+y*pFrame->linesize[0], 1, width*3, pFile); // Close file fclose(pFile); } int main(int argc, char *argv[]) { AVFormatContext *pFormatCtx; int i, videoStream; AVCodecContext *pCodecCtx; AVCodec *pCodec; AVFrame *pFrame; AVFrame *pFrameRGB; AVPacket packet; int frameFinished; int numBytes; uint8_t *buffer; if(argc < 2) { printf("Please provide a movie file\n"); return -1; } // Register all formats and codecs av_register_all(); // Open video file if(av_open_input_file(&pFormatCtx, argv[1], NULL, 0, NULL)!=0) return -1; // Couldn't open file // Retrieve stream information if(av_find_stream_info(pFormatCtx)<0) return -1; // Couldn't find stream information // Dump information about file onto standard error dump_format(pFormatCtx, 0, argv[1], 0); // Find the first video stream videoStream=-1; for(i=0; i<pFormatCtx->nb_streams; i++) if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) { videoStream=i; 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; // 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 } // Open codec if(avcodec_open(pCodecCtx, pCodec)<0) return -1; // Could not open codec // Allocate video frame pFrame=avcodec_alloc_frame(); // Allocate an AVFrame structure pFrameRGB=avcodec_alloc_frame(); if(pFrameRGB==NULL) return -1; // Determine required buffer size and allocate buffer numBytes=avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height); buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t)); // Assign appropriate parts of buffer to image planes in pFrameRGB // Note that pFrameRGB is an AVFrame, but AVFrame is a superset // of AVPicture avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height); // Read frames and save first five frames to disk i=0; while(av_read_frame(pFormatCtx, &packet)>=0) { // Is this a packet from the video stream? if(packet.stream_index==videoStream) { // Decode video frame avcodec_decode_video(pCodecCtx, pFrame, &frameFinished, packet.data, packet.size); // Did we get a video frame? if(frameFinished) { // Convert the image from its native format to RGB img_convert((AVPicture *)pFrameRGB, PIX_FMT_RGB24, (AVPicture*)pFrame, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height); // Save the frame to disk if(++i<=5) SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height, i); } } // Free the packet that was allocated by av_read_frame av_free_packet(&packet); } // Free the RGB image av_free(buffer); av_free(pFrameRGB); // Free the YUV frame av_free(pFrame); // Close the codec avcodec_close(pCodecCtx); // Close the video file av_close_input_file(pFormatCtx); return 0; } 

Answer 1

You need to add the path to the libavcodec and libavformat include files to your command line. Find the include / directory and add

 -Ipath/to/include 

for each of the corresponding include files.

You will also need to do the same for library directories using -L.

Answer 2

This error occurs due to an error in the path.

-L / home / yourpath / ffmpeg_build / Library /

-I / home / yourpath / ffmpeg_build / enable /

ffmpeg_build - where files will be created and libraries installed.

Example:

create file "execute.sh"

NOW open the file and paste the following code:

 g++ -Wno-format-zero-length -Wno-write-strings -L/home/yourpath/ffmpeg_build/lib/ -I/home/yourpath/ffmpeg_build/include/ -o output program.cpp -lavcodec -lavformat -lavutil -lavdevice -lswresample -lswscale -lm -lva -lpthread -lvorbis -lvpx -lopus -lz -lpostproc -ldl -lfdk-aac -lmp3lame -lvorbisenc -lvorbisfile -lx264 -ltheora -ltheoraenc -ltheoradec -ldl -lrt -lx265 -lbz2 

and type: sh execute.sh and binary will be created in the name "output" then type. / output for output.

Note: above for C ++, for c changing g ++ code to gcc