├── 02_avformat_context.cpp ├── 03_avcodec_context..cpp ├── 04_DecodeAndDumpVideo.cpp ├── 05_DecodeAndDisplayVideo.cpp ├── 06_PacketQueue.cpp ├── 07_PlayingAudio - 1.cpp ├── 08_PlayingAudio - 2.cpp ├── FFMPEG_TRANSCODE.drawio ├── LICENSE ├── README.md ├── audio_player.jpg └── packetqueue.jpg /02_avformat_context.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | // libavformat deals with the capsule of video 4 | 5 | // if your code c++, you can include c headers with an extern encapsulation 6 | extern "C" 7 | { 8 | #include 9 | } 10 | 11 | int main() 12 | { 13 | 14 | AVFormatContext *fmt_ctx = NULL; 15 | int ret; 16 | char *filename = "D:\\Wildlife.wmv"; 17 | 18 | 19 | av_register_all(); 20 | 21 | //fill format context with file info 22 | if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL))) 23 | return ret; 24 | 25 | // get streams info from format context 26 | if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) { 27 | av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n"); 28 | return ret; 29 | } 30 | 31 | // loop streams and dump info 32 | for (int i = 0; i < fmt_ctx->nb_streams; i++) 33 | { 34 | av_dump_format(fmt_ctx, i, filename, false); 35 | } 36 | 37 | // close format context 38 | avformat_close_input(&fmt_ctx); 39 | 40 | system("PAUSE"); 41 | 42 | return 0; 43 | 44 | } 45 | -------------------------------------------------------------------------------- /03_avcodec_context..cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | 4 | extern "C" 5 | { 6 | // include format and codec headers 7 | #include 8 | #include 9 | 10 | } 11 | 12 | 13 | int main() 14 | { 15 | 16 | // declare format and codec contexts, also codec for decoding 17 | AVFormatContext *fmt_ctx = NULL; 18 | AVCodecContext *CodecCtx = NULL; 19 | AVCodec *Codec = NULL; 20 | int ret; 21 | char *filename = "D:\\Wildlife.wmv"; 22 | int VideoStreamID = -1; 23 | 24 | 25 | av_register_all(); 26 | 27 | // open input file 28 | if (ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL) < 0) 29 | { 30 | av_log(NULL, AV_LOG_ERROR, "cannot open input file\n"); 31 | goto end; 32 | } 33 | 34 | //get stream info 35 | if (ret = avformat_find_stream_info(fmt_ctx, NULL) < 0) 36 | { 37 | av_log(NULL, AV_LOG_ERROR, "cannot get stream info\n"); 38 | goto end; 39 | } 40 | 41 | // get video stream index 42 | for (int i = 0; i < fmt_ctx->nb_streams; i++) 43 | { 44 | if (fmt_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) 45 | { 46 | VideoStreamID = i; 47 | break; 48 | } 49 | } 50 | 51 | if (VideoStreamID < 0) 52 | { 53 | av_log(NULL, AV_LOG_ERROR, "No video stream\n"); 54 | goto end; 55 | } 56 | 57 | // dump video stream info 58 | av_dump_format(fmt_ctx, VideoStreamID, filename, false); 59 | 60 | //alloc memory for codec context 61 | CodecCtx = avcodec_alloc_context3(NULL); 62 | 63 | // retrieve codec params from format context 64 | if (ret = avcodec_parameters_to_context(CodecCtx, fmt_ctx->streams[VideoStreamID]->codecpar) < 0) 65 | { 66 | av_log(NULL, AV_LOG_ERROR, "Cannot get codec parameters\n"); 67 | goto end; 68 | } 69 | 70 | // find decoding codec 71 | Codec = avcodec_find_decoder(CodecCtx->codec_id); 72 | 73 | if (Codec == NULL) 74 | { 75 | av_log(NULL, AV_LOG_ERROR, "No decoder found\n"); 76 | goto end; 77 | } 78 | 79 | // try to open codec 80 | if (ret = avcodec_open2(CodecCtx, Codec, NULL) < 0) 81 | { 82 | av_log(NULL, AV_LOG_ERROR, "Cannot open video decoder\n"); 83 | goto end; 84 | } 85 | 86 | printf("\nDecoding codec is : %s\n", Codec->name); 87 | 88 | 89 | // clear and out 90 | end: 91 | if (CodecCtx) 92 | avcodec_close(CodecCtx); 93 | if (fmt_ctx) 94 | avformat_close_input(&fmt_ctx); 95 | system("PAUSE"); 96 | 97 | return 0; 98 | } 99 | -------------------------------------------------------------------------------- /04_DecodeAndDumpVideo.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | 4 | extern "C" 5 | { 6 | // include format and codec headers 7 | #include 8 | #include 9 | 10 | } 11 | 12 | void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, FILE *f) 13 | { 14 | // write header 15 | fprintf(f, "P5\n%d %d\n%d\n", xsize, ysize, 255); 16 | // loop until all rows are written to file 17 | for (int i = 0; i < ysize; i++) 18 | fwrite(buf + i * wrap, 1, xsize, f); 19 | } 20 | 21 | void decode(AVCodecContext *dec_ctx, AVFrame *frame, AVPacket *pkt, FILE *f) 22 | { 23 | char buf[1024]; 24 | int ret; 25 | 26 | //send packet to decoder 27 | ret = avcodec_send_packet(dec_ctx, pkt); 28 | if (ret < 0) { 29 | fprintf(stderr, "Error sending a packet for decoding\n"); 30 | exit(1); 31 | } 32 | while (ret >= 0) { 33 | // receive frame from decoder 34 | // we may receive multiple frames or we may consume all data from decoder, then return to main loop 35 | ret = avcodec_receive_frame(dec_ctx, frame); 36 | if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) 37 | return; 38 | else if (ret < 0) { 39 | // something wrong, quit program 40 | fprintf(stderr, "Error during decoding\n"); 41 | exit(1); 42 | } 43 | printf("saving frame %3d\n", dec_ctx->frame_number); 44 | fflush(stdout); 45 | // send frame info to writing function 46 | pgm_save(frame->data[0], frame->linesize[0],frame->width, frame->height, f); 47 | } 48 | } 49 | 50 | 51 | int main() 52 | { 53 | 54 | // declare format and codec contexts, also codec for decoding 55 | AVFormatContext *fmt_ctx = NULL; 56 | AVCodecContext *codec_ctx = NULL; 57 | AVCodec *Codec = NULL; 58 | int ret; 59 | char *infilename = "D:\\Wildlife.wmv"; 60 | char *outfilename = "D:\\Wildlife.yuv"; 61 | int VideoStreamIndex = -1; 62 | 63 | FILE *fin = NULL; 64 | FILE *fout = NULL; 65 | 66 | AVFrame *frame = NULL; 67 | AVPacket *pkt = NULL; 68 | 69 | 70 | av_register_all(); 71 | 72 | // open input file 73 | if (ret = avformat_open_input(&fmt_ctx, infilename, NULL, NULL) < 0) 74 | { 75 | av_log(NULL, AV_LOG_ERROR, "cannot open input file\n"); 76 | goto end; 77 | } 78 | 79 | //get stream info 80 | if (ret = avformat_find_stream_info(fmt_ctx, NULL) < 0) 81 | { 82 | av_log(NULL, AV_LOG_ERROR, "cannot get stream info\n"); 83 | goto end; 84 | } 85 | 86 | // get video stream index 87 | for (int i = 0; i < fmt_ctx->nb_streams; i++) 88 | { 89 | if (fmt_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) 90 | { 91 | VideoStreamIndex = i; 92 | break; 93 | } 94 | } 95 | 96 | if (VideoStreamIndex < 0) 97 | { 98 | av_log(NULL, AV_LOG_ERROR, "No video stream\n"); 99 | goto end; 100 | } 101 | 102 | // dump video stream info 103 | av_dump_format(fmt_ctx, VideoStreamIndex, infilename, false); 104 | 105 | //alloc memory for codec context 106 | codec_ctx = avcodec_alloc_context3(NULL); 107 | 108 | // retrieve codec params from format context 109 | if (ret = avcodec_parameters_to_context(codec_ctx, fmt_ctx->streams[VideoStreamIndex]->codecpar) < 0) 110 | { 111 | av_log(NULL, AV_LOG_ERROR, "Cannot get codec parameters\n"); 112 | goto end; 113 | } 114 | 115 | // find decoding codec 116 | Codec = avcodec_find_decoder(codec_ctx->codec_id); 117 | 118 | if (Codec == NULL) 119 | { 120 | av_log(NULL, AV_LOG_ERROR, "No decoder found\n"); 121 | goto end; 122 | } 123 | 124 | // try to open codec 125 | if (ret = avcodec_open2(codec_ctx, Codec, NULL) < 0) 126 | { 127 | av_log(NULL, AV_LOG_ERROR, "Cannot open video decoder\n"); 128 | goto end; 129 | } 130 | 131 | printf("\nDecoding codec is : %s\n", Codec->name); 132 | 133 | //init packet 134 | pkt = av_packet_alloc(); 135 | av_init_packet(pkt); 136 | if (!pkt) 137 | { 138 | av_log(NULL, AV_LOG_ERROR, "Cannot init packet\n"); 139 | goto end; 140 | } 141 | 142 | // init frame 143 | frame = av_frame_alloc(); 144 | if (!frame) 145 | { 146 | av_log(NULL, AV_LOG_ERROR, "Cannot init frame\n"); 147 | goto end; 148 | } 149 | 150 | //open input file 151 | fin = fopen(infilename, "rb"); 152 | if (!fin) 153 | { 154 | av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n"); 155 | goto end; 156 | } 157 | 158 | // open output file 159 | fout = fopen(outfilename, "w"); 160 | if (!fout) 161 | { 162 | av_log(NULL, AV_LOG_ERROR, "Cannot open output file\n"); 163 | goto end; 164 | } 165 | 166 | // main loop 167 | while (1) 168 | { 169 | // read an encoded packet from file 170 | if (ret = av_read_frame(fmt_ctx, pkt) < 0) 171 | { 172 | av_log(NULL, AV_LOG_ERROR, "cannot read frame"); 173 | break; 174 | } 175 | // if packet data is video data then send it to decoder 176 | if (pkt->stream_index == VideoStreamIndex) 177 | { 178 | decode(codec_ctx, frame, pkt, fout); 179 | } 180 | 181 | // release packet buffers to be allocated again 182 | av_packet_unref(pkt); 183 | } 184 | 185 | //flush decoder 186 | decode(codec_ctx, frame, NULL, fout); 187 | 188 | // clear and out 189 | end: 190 | if (fin) 191 | fclose(fin); 192 | if (fout) 193 | fclose(fout); 194 | if (codec_ctx) 195 | avcodec_close(codec_ctx); 196 | if (fmt_ctx) 197 | avformat_close_input(&fmt_ctx); 198 | if (frame) 199 | av_frame_free(&frame); 200 | if (pkt) 201 | av_packet_free(&pkt); 202 | system("PAUSE"); 203 | 204 | return 0; 205 | } -------------------------------------------------------------------------------- /05_DecodeAndDisplayVideo.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | 4 | extern "C" 5 | { 6 | // include format and codec headers 7 | #include 8 | #include 9 | #include 10 | } 11 | 12 | #undef main 13 | 14 | // define sdl variables globally, because we are writing c style 15 | SDL_Renderer *renderer; 16 | SDL_Texture *texture; 17 | SDL_Rect r; 18 | 19 | void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, FILE *f) 20 | { 21 | // write header 22 | fprintf(f, "P5\n%d %d\n%d\n", xsize, ysize, 255); 23 | // loop until all rows are written to file 24 | for (int i = 0; i < ysize; i++) 25 | fwrite(buf + i * wrap, 1, xsize, f); 26 | } 27 | 28 | void displayFrame(AVFrame * frame, AVCodecContext *dec_ctx) 29 | { 30 | // pass frame data to texture then copy texture to renderer and present renderer 31 | SDL_UpdateYUVTexture(texture, &r, frame->data[0], frame->linesize[0], frame->data[1], frame->linesize[1], frame->data[2], frame->linesize[2]); 32 | SDL_RenderClear(renderer); 33 | SDL_RenderCopy(renderer, texture, NULL, NULL); 34 | SDL_RenderPresent(renderer); 35 | } 36 | 37 | 38 | void decode(AVCodecContext *dec_ctx, AVFrame *frame, AVPacket *pkt, FILE *f) 39 | { 40 | int ret; 41 | 42 | //send packet to decoder 43 | ret = avcodec_send_packet(dec_ctx, pkt); 44 | if (ret < 0) { 45 | fprintf(stderr, "Error sending a packet for decoding\n"); 46 | exit(1); 47 | } 48 | while (ret >= 0) { 49 | // receive frame from decoder 50 | // we may receive multiple frames or we may consume all data from decoder, then return to main loop 51 | ret = avcodec_receive_frame(dec_ctx, frame); 52 | if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) 53 | return; 54 | else if (ret < 0) { 55 | // something wrong, quit program 56 | fprintf(stderr, "Error during decoding\n"); 57 | exit(1); 58 | } 59 | printf("saving frame %3d\n", dec_ctx->frame_number); 60 | fflush(stdout); 61 | 62 | 63 | // display frame on sdl window 64 | displayFrame(frame, dec_ctx); 65 | 66 | // send frame info to writing function 67 | pgm_save(frame->data[0], frame->linesize[0],frame->width, frame->height, f); 68 | } 69 | } 70 | 71 | 72 | int initSDL(AVCodecContext *codec_ctx) 73 | { 74 | SDL_Window *window = NULL; 75 | 76 | // init SDL 77 | if (SDL_Init(SDL_INIT_VIDEO) < 0) 78 | { 79 | fprintf(stderr, "could not init sdl %s\n", SDL_GetError()); 80 | return -1; 81 | } 82 | 83 | //create sdl window 84 | window = SDL_CreateWindow("Preview", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, codec_ctx->width, codec_ctx->height, 0); 85 | if (!window) 86 | { 87 | fprintf(stderr, "could not create sdl window \n"); 88 | return -1; 89 | } 90 | 91 | // specify rectangle position and scale 92 | r.x = 0; 93 | r.y = 0; 94 | r.w = codec_ctx->width; 95 | r.h = codec_ctx->height; 96 | 97 | // create sdl renderer 98 | renderer = SDL_CreateRenderer(window, -1, 0); 99 | if (!renderer) 100 | { 101 | fprintf(stderr, "could not create sdl renderer \n"); 102 | return -1; 103 | } 104 | 105 | // create texture 106 | texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, codec_ctx->width, codec_ctx->height); 107 | if (!texture) 108 | { 109 | fprintf(stderr, "could not create sdl texture \n"); 110 | return -1; 111 | } 112 | 113 | return 0; 114 | } 115 | 116 | 117 | 118 | int main() 119 | { 120 | 121 | // declare format and codec contexts, also codec for decoding 122 | AVFormatContext *fmt_ctx = NULL; 123 | AVCodecContext *codec_ctx = NULL; 124 | AVCodec *Codec = NULL; 125 | int ret; 126 | char *infilename = "D:\\Wildlife.wmv"; 127 | char *outfilename = "D:\\Wildlife.yuv"; 128 | int VideoStreamIndex = -1; 129 | 130 | FILE *fin = NULL; 131 | FILE *fout = NULL; 132 | 133 | AVFrame *frame = NULL; 134 | AVPacket *pkt = NULL; 135 | 136 | 137 | av_register_all(); 138 | 139 | // open input file 140 | if (ret = avformat_open_input(&fmt_ctx, infilename, NULL, NULL) < 0) 141 | { 142 | av_log(NULL, AV_LOG_ERROR, "cannot open input file\n"); 143 | goto end; 144 | } 145 | 146 | //get stream info 147 | if (ret = avformat_find_stream_info(fmt_ctx, NULL) < 0) 148 | { 149 | av_log(NULL, AV_LOG_ERROR, "cannot get stream info\n"); 150 | goto end; 151 | } 152 | 153 | // get video stream index 154 | for (int i = 0; i < fmt_ctx->nb_streams; i++) 155 | { 156 | if (fmt_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) 157 | { 158 | VideoStreamIndex = i; 159 | break; 160 | } 161 | } 162 | 163 | if (VideoStreamIndex < 0) 164 | { 165 | av_log(NULL, AV_LOG_ERROR, "No video stream\n"); 166 | goto end; 167 | } 168 | 169 | // dump video stream info 170 | av_dump_format(fmt_ctx, VideoStreamIndex, infilename, false); 171 | 172 | //alloc memory for codec context 173 | codec_ctx = avcodec_alloc_context3(NULL); 174 | 175 | // retrieve codec params from format context 176 | if (ret = avcodec_parameters_to_context(codec_ctx, fmt_ctx->streams[VideoStreamIndex]->codecpar) < 0) 177 | { 178 | av_log(NULL, AV_LOG_ERROR, "Cannot get codec parameters\n"); 179 | goto end; 180 | } 181 | 182 | // find decoding codec 183 | Codec = avcodec_find_decoder(codec_ctx->codec_id); 184 | 185 | if (Codec == NULL) 186 | { 187 | av_log(NULL, AV_LOG_ERROR, "No decoder found\n"); 188 | goto end; 189 | } 190 | 191 | // try to open codec 192 | if (ret = avcodec_open2(codec_ctx, Codec, NULL) < 0) 193 | { 194 | av_log(NULL, AV_LOG_ERROR, "Cannot open video decoder\n"); 195 | goto end; 196 | } 197 | 198 | printf("\nDecoding codec is : %s\n", Codec->name); 199 | 200 | //init packet 201 | pkt = av_packet_alloc(); 202 | av_init_packet(pkt); 203 | if (!pkt) 204 | { 205 | av_log(NULL, AV_LOG_ERROR, "Cannot init packet\n"); 206 | goto end; 207 | } 208 | 209 | // init frame 210 | frame = av_frame_alloc(); 211 | if (!frame) 212 | { 213 | av_log(NULL, AV_LOG_ERROR, "Cannot init frame\n"); 214 | goto end; 215 | } 216 | 217 | //open input file 218 | fin = fopen(infilename, "rb"); 219 | if (!fin) 220 | { 221 | av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n"); 222 | goto end; 223 | } 224 | 225 | // open output file 226 | fout = fopen(outfilename, "w"); 227 | if (!fout) 228 | { 229 | av_log(NULL, AV_LOG_ERROR, "Cannot open output file\n"); 230 | goto end; 231 | } 232 | 233 | // init sdl 234 | if (initSDL(codec_ctx) < 0) 235 | { 236 | av_log(NULL, AV_LOG_ERROR, "init sdl failed\n"); 237 | goto end; 238 | } 239 | 240 | // main loop 241 | while (1) 242 | { 243 | // read an encoded packet from file 244 | if (ret = av_read_frame(fmt_ctx, pkt) < 0) 245 | { 246 | av_log(NULL, AV_LOG_ERROR, "cannot read frame"); 247 | break; 248 | } 249 | // if packet data is video data then send it to decoder 250 | if (pkt->stream_index == VideoStreamIndex) 251 | { 252 | decode(codec_ctx, frame, pkt, fout); 253 | } 254 | 255 | // release packet buffers to be allocated again 256 | av_packet_unref(pkt); 257 | } 258 | 259 | //flush decoder 260 | decode(codec_ctx, frame, NULL, fout); 261 | 262 | // clear and out 263 | end: 264 | if (fin) 265 | fclose(fin); 266 | if (fout) 267 | fclose(fout); 268 | if (codec_ctx) 269 | avcodec_close(codec_ctx); 270 | if (fmt_ctx) 271 | avformat_close_input(&fmt_ctx); 272 | if (frame) 273 | av_frame_free(&frame); 274 | if (pkt) 275 | av_packet_free(&pkt); 276 | system("PAUSE"); 277 | 278 | return 0; 279 | } -------------------------------------------------------------------------------- /06_PacketQueue.cpp: -------------------------------------------------------------------------------- 1 | 2 | #include 3 | #include 4 | #include 5 | #include 6 | 7 | #ifdef __cplusplus 8 | extern "C" 9 | { 10 | #endif 11 | #include 12 | #include 13 | #include 14 | #include 15 | //#include 16 | #include 17 | #include 18 | //#include 19 | 20 | #define SDL_MAIN_HANDLED 21 | 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #ifdef __cplusplus 28 | } 29 | #endif 30 | 31 | 32 | 33 | typedef struct _PacketQueue 34 | { 35 | AVPacketList *first, *last; 36 | int nb_packets, size; 37 | } PacketQueue; 38 | 39 | void PacketQueueInit(PacketQueue * pq) 40 | { 41 | memset(pq, 0, sizeof(PacketQueue)); 42 | } 43 | 44 | int PacketQueuePut(PacketQueue * pq, const AVPacket * srcPkt) 45 | { 46 | AVPacketList *elt; 47 | 48 | int rv; 49 | if (!pq) return -1; 50 | 51 | elt = (AVPacketList*)av_malloc(sizeof(AVPacketList)); 52 | if (!elt) return -1; 53 | elt->pkt = *srcPkt; 54 | elt->next = NULL; 55 | 56 | if (!pq->last) // check queue is empty, use last item 57 | pq->first = elt; 58 | else 59 | pq->last->next = elt; 60 | pq->last = elt; 61 | pq->nb_packets++; 62 | pq->size += elt->pkt.size; 63 | 64 | return 0; 65 | } 66 | 67 | int PacketQueueGet(PacketQueue *pq, AVPacket *pkt) 68 | { 69 | AVPacketList * elt; 70 | int rv; 71 | 72 | if (!pq || !pkt) return -1; 73 | 74 | elt = pq->first; 75 | if (elt) 76 | { 77 | pq->first = elt->next; 78 | if (!pq->first) 79 | pq->last = NULL; // queue is empty 80 | pq->nb_packets--; 81 | pq->size -= elt->pkt.size; 82 | *pkt = elt->pkt; 83 | av_free(elt); 84 | rv = 1; 85 | 86 | } 87 | 88 | return rv; 89 | } 90 | 91 | PacketQueue audioq; 92 | 93 | int main() 94 | { 95 | PacketQueueInit(&audioq); 96 | int i; 97 | AVPacket* pkt; 98 | 99 | 100 | for (i = 0; i < 10; i++) 101 | { 102 | pkt = av_packet_alloc(); 103 | pkt->pos = i; 104 | PacketQueuePut(&audioq, pkt); 105 | 106 | } 107 | 108 | for (i = 0; i < 10; i++) 109 | { 110 | 111 | PacketQueueGet(&audioq, pkt); 112 | printf("Packet pos : %d\n", pkt->pos); 113 | 114 | } 115 | 116 | printf("Number Of Packets Left : %d\n", audioq.nb_packets); 117 | printf("Size of Queue : %d\n", audioq.size); 118 | 119 | 120 | 121 | 122 | system("PAUSE"); 123 | 124 | return 0; 125 | } 126 | -------------------------------------------------------------------------------- /07_PlayingAudio - 1.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/loupus/ffmpeg_tutorial/f5d87901b12201beea658722a70f8e0b29cba748/07_PlayingAudio - 1.cpp -------------------------------------------------------------------------------- /08_PlayingAudio - 2.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/loupus/ffmpeg_tutorial/f5d87901b12201beea658722a70f8e0b29cba748/08_PlayingAudio - 2.cpp -------------------------------------------------------------------------------- /FFMPEG_TRANSCODE.drawio: -------------------------------------------------------------------------------- 1 | 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 -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ffmpeg_tutorial 2 | 3 | For beginners of ffmpeg api. Also visit https://www.youtube.com/user/nesessoftware/ for video. 4 | Ffmpeg version 3.4.1. 5 | Make sure you know about containers, codecs and which libav library does which work 6 | -------------------------------------------------------------------------------- /audio_player.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/loupus/ffmpeg_tutorial/f5d87901b12201beea658722a70f8e0b29cba748/audio_player.jpg -------------------------------------------------------------------------------- /packetqueue.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/loupus/ffmpeg_tutorial/f5d87901b12201beea658722a70f8e0b29cba748/packetqueue.jpg --------------------------------------------------------------------------------