Linux下编译带x264的ffmpeg的配置方法,包含SDL2
一、环境准备
ffmpeg下载:http://www.ffmpeg.org/download.html
x264下载:http://download.videolan.org/x264/snapshots/
yasm下载:http://yasm.tortall.net/Download.html
二、编译
1、编译yasm。最新的x264,要求yasm1.2以上
./configure --prefix=/usr/local/yasm
make
make install
2、解压x264,进入目录,输入:
./configure --prefix=/usr/local/x264 --enable-shared --enable-static --enable-yasm
make
make install
由于是手动安装的yasm,下面继续的时候,可能会报yasm找不到,需在/etc/profile
export PATH=$PATH:/usr/local/yasm/bin
之后
source /etc/profile
3、解压ffmpeg,进入目录,
然后安装ffmpeg,ffmpeg有许多依赖包,需要一个一个先安装
apt-get install libfaac-dev libmp3lame-dev libtheora-dev libvorbis-dev libxvidcore-dev libxext-dev libxfixes-dev
输入:
make
make install
三、配置环境变量及库路径
首先是命令的路径,编辑/etc/profile
- /**
- * @file
- * libavcodec API use example.
- *
- * @example decoding_encoding.c
- * Note that libavcodec only handles codecs (mpeg, mpeg4, etc...),
- * not file formats (avi, vob, mp4, mov, mkv, mxf, flv, mpegts, mpegps, etc...). See library 'libavformat' for the
- * format handling
- */
- #include <math.h>
- #include <libavutil/opt.h>
- #include <libavcodec/avcodec.h>
- #include <libavutil/channel_layout.h>
- #include <libavutil/common.h>
- #include <libavutil/imgutils.h>
- #include <libavutil/mathematics.h>
- #include <libavutil/samplefmt.h>
- #define INBUF_SIZE 4096
- #define AUDIO_INBUF_SIZE 20480
- #define AUDIO_REFILL_THRESH 4096
- /* check that a given sample format is supported by the encoder */
- static int check_sample_fmt(AVCodec *codec, enum AVSampleFormat sample_fmt)
- {
- const enum AVSampleFormat *p = codec->sample_fmts;
- while (*p != AV_SAMPLE_FMT_NONE) {
- if (*p == sample_fmt)
- return ;
- p++;
- }
- return ;
- }
- /* just pick the highest supported samplerate */
- static int select_sample_rate(AVCodec *codec)
- {
- const int *p;
- int best_samplerate = ;
- if (!codec->supported_samplerates)
- return ;
- p = codec->supported_samplerates;
- while (*p) {
- best_samplerate = FFMAX(*p, best_samplerate);
- p++;
- }
- return best_samplerate;
- }
- /* select layout with the highest channel count */
- static int select_channel_layout(AVCodec *codec)
- {
- const uint64_t *p;
- uint64_t best_ch_layout = ;
- int best_nb_channels = ;
- if (!codec->channel_layouts)
- return AV_CH_LAYOUT_STEREO;
- p = codec->channel_layouts;
- while (*p) {
- int nb_channels = av_get_channel_layout_nb_channels(*p);
- if (nb_channels > best_nb_channels) {
- best_ch_layout = *p;
- best_nb_channels = nb_channels;
- }
- p++;
- }
- return best_ch_layout;
- }
- /*
- * Audio encoding example
- */
- static void audio_encode_example(const char *filename)
- {
- AVCodec *codec;
- AVCodecContext *c= NULL;
- AVFrame *frame;
- AVPacket pkt;
- int i, j, k, ret, got_output;
- int buffer_size;
- FILE *f;
- uint16_t *samples;
- float t, tincr;
- printf("Encode audio file %s\n", filename);
- /* find the MP2 encoder */
- codec = avcodec_find_encoder(AV_CODEC_ID_MP2);
- if (!codec) {
- fprintf(stderr, "Codec not found\n");
- exit();
- }
- c = avcodec_alloc_context3(codec);
- if (!c) {
- fprintf(stderr, "Could not allocate audio codec context\n");
- exit();
- }
- /* put sample parameters */
- c->bit_rate = ;
- /* check that the encoder supports s16 pcm input */
- c->sample_fmt = AV_SAMPLE_FMT_S16;
- if (!check_sample_fmt(codec, c->sample_fmt)) {
- fprintf(stderr, "Encoder does not support sample format %s",
- av_get_sample_fmt_name(c->sample_fmt));
- exit();
- }
- /* select other audio parameters supported by the encoder */
- c->sample_rate = select_sample_rate(codec);
- c->channel_layout = select_channel_layout(codec);
- c->channels = av_get_channel_layout_nb_channels(c->channel_layout);
- /* open it */
- if (avcodec_open2(c, codec, NULL) < ) {
- fprintf(stderr, "Could not open codec\n");
- exit();
- }
- f = fopen(filename, "wb");
- if (!f) {
- fprintf(stderr, "Could not open %s\n", filename);
- exit();
- }
- /* frame containing input raw audio */
- frame = av_frame_alloc();
- if (!frame) {
- fprintf(stderr, "Could not allocate audio frame\n");
- exit();
- }
- frame->nb_samples = c->frame_size;
- frame->format = c->sample_fmt;
- frame->channel_layout = c->channel_layout;
- /* the codec gives us the frame size, in samples,
- * we calculate the size of the samples buffer in bytes */
- buffer_size = av_samples_get_buffer_size(NULL, c->channels, c->frame_size,
- c->sample_fmt, );
- if (buffer_size < ) {
- fprintf(stderr, "Could not get sample buffer size\n");
- exit();
- }
- samples = av_malloc(buffer_size);
- if (!samples) {
- fprintf(stderr, "Could not allocate %d bytes for samples buffer\n",
- buffer_size);
- exit();
- }
- /* setup the data pointers in the AVFrame */
- ret = avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
- (const uint8_t*)samples, buffer_size, );
- if (ret < ) {
- fprintf(stderr, "Could not setup audio frame\n");
- exit();
- }
- /* encode a single tone sound */
- t = ;
- tincr = * M_PI * 440.0 / c->sample_rate;
- for (i = ; i < ; i++) {
- av_init_packet(&pkt);
- pkt.data = NULL; // packet data will be allocated by the encoder
- pkt.size = ;
- for (j = ; j < c->frame_size; j++) {
- samples[*j] = (int)(sin(t) * );
- for (k = ; k < c->channels; k++)
- samples[*j + k] = samples[*j];
- t += tincr;
- }
- /* encode the samples */
- ret = avcodec_encode_audio2(c, &pkt, frame, &got_output);
- if (ret < ) {
- fprintf(stderr, "Error encoding audio frame\n");
- exit();
- }
- if (got_output) {
- fwrite(pkt.data, , pkt.size, f);
- av_free_packet(&pkt);
- }
- }
- /* get the delayed frames */
- for (got_output = ; got_output; i++) {
- ret = avcodec_encode_audio2(c, &pkt, NULL, &got_output);
- if (ret < ) {
- fprintf(stderr, "Error encoding frame\n");
- exit();
- }
- if (got_output) {
- fwrite(pkt.data, , pkt.size, f);
- av_free_packet(&pkt);
- }
- }
- fclose(f);
- av_freep(&samples);
- av_frame_free(&frame);
- avcodec_close(c);
- av_free(c);
- }
- /*
- * Audio decoding.
- */
- static void audio_decode_example(const char *outfilename, const char *filename)
- {
- AVCodec *codec;
- AVCodecContext *c= NULL;
- int len;
- FILE *f, *outfile;
- uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
- AVPacket avpkt;
- AVFrame *decoded_frame = NULL;
- av_init_packet(&avpkt);
- printf("Decode audio file %s to %s\n", filename, outfilename);
- /* find the mpeg audio decoder */
- codec = avcodec_find_decoder(AV_CODEC_ID_MP2);
- if (!codec) {
- fprintf(stderr, "Codec not found\n");
- exit();
- }
- c = avcodec_alloc_context3(codec);
- if (!c) {
- fprintf(stderr, "Could not allocate audio codec context\n");
- exit();
- }
- /* open it */
- if (avcodec_open2(c, codec, NULL) < ) {
- fprintf(stderr, "Could not open codec\n");
- exit();
- }
- f = fopen(filename, "rb");
- if (!f) {
- fprintf(stderr, "Could not open %s\n", filename);
- exit();
- }
- outfile = fopen(outfilename, "wb");
- if (!outfile) {
- av_free(c);
- exit();
- }
- /* decode until eof */
- avpkt.data = inbuf;
- avpkt.size = fread(inbuf, , AUDIO_INBUF_SIZE, f);
- while (avpkt.size > ) {
- int got_frame = ;
- if (!decoded_frame) {
- if (!(decoded_frame = av_frame_alloc())) {
- fprintf(stderr, "Could not allocate audio frame\n");
- exit();
- }
- }
- len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt);
- if (len < ) {
- fprintf(stderr, "Error while decoding\n");
- exit();
- }
- if (got_frame) {
- /* if a frame has been decoded, output it */
- int data_size = av_samples_get_buffer_size(NULL, c->channels,
- decoded_frame->nb_samples,
- c->sample_fmt, );
- if (data_size < ) {
- /* This should not occur, checking just for paranoia */
- fprintf(stderr, "Failed to calculate data size\n");
- exit();
- }
- fwrite(decoded_frame->data[], , data_size, outfile);
- }
- avpkt.size -= len;
- avpkt.data += len;
- avpkt.dts =
- avpkt.pts = AV_NOPTS_VALUE;
- if (avpkt.size < AUDIO_REFILL_THRESH) {
- /* Refill the input buffer, to avoid trying to decode
- * incomplete frames. Instead of this, one could also use
- * a parser, or use a proper container format through
- * libavformat. */
- memmove(inbuf, avpkt.data, avpkt.size);
- avpkt.data = inbuf;
- len = fread(avpkt.data + avpkt.size, ,
- AUDIO_INBUF_SIZE - avpkt.size, f);
- if (len > )
- avpkt.size += len;
- }
- }
- fclose(outfile);
- fclose(f);
- avcodec_close(c);
- av_free(c);
- av_frame_free(&decoded_frame);
- }
- /*
- * Video encoding example
- */
- static void video_encode_example(const char *filename, int codec_id)
- {
- AVCodec *codec;
- AVCodecContext *c= NULL;
- int i, ret, x, y, got_output;
- FILE *f;
- AVFrame *frame;
- AVPacket pkt;
- uint8_t endcode[] = { , , , 0xb7 };
- printf("Encode video file %s\n", filename);
- /* find the mpeg1 video encoder */
- codec = avcodec_find_encoder(codec_id);
- if (!codec) {
- fprintf(stderr, "Codec not found\n");
- exit();
- }
- c = avcodec_alloc_context3(codec);
- if (!c) {
- fprintf(stderr, "Could not allocate video codec context\n");
- exit();
- }
- /* put sample parameters */
- c->bit_rate = ;
- /* resolution must be a multiple of two */
- c->width = ;
- c->height = ;
- /* frames per second */
- c->time_base = (AVRational){,};
- /* emit one intra frame every ten frames
- * check frame pict_type before passing frame
- * to encoder, if frame->pict_type is AV_PICTURE_TYPE_I
- * then gop_size is ignored and the output of encoder
- * will always be I frame irrespective to gop_size
- */
- c->gop_size = ;
- c->max_b_frames = ;
- c->pix_fmt = AV_PIX_FMT_YUV420P;
- if (codec_id == AV_CODEC_ID_H264)
- av_opt_set(c->priv_data, "preset", "slow", );
- /* open it */
- if (avcodec_open2(c, codec, NULL) < ) {
- fprintf(stderr, "Could not open codec\n");
- exit();
- }
- f = fopen(filename, "wb");
- if (!f) {
- fprintf(stderr, "Could not open %s\n", filename);
- exit();
- }
- frame = av_frame_alloc();
- if (!frame) {
- fprintf(stderr, "Could not allocate video frame\n");
- exit();
- }
- frame->format = c->pix_fmt;
- frame->width = c->width;
- frame->height = c->height;
- /* the image can be allocated by any means and av_image_alloc() is
- * just the most convenient way if av_malloc() is to be used */
- ret = av_image_alloc(frame->data, frame->linesize, c->width, c->height,
- c->pix_fmt, );
- if (ret < ) {
- fprintf(stderr, "Could not allocate raw picture buffer\n");
- exit();
- }
- /* encode 1 second of video */
- for (i = ; i < ; i++) {
- av_init_packet(&pkt);
- pkt.data = NULL; // packet data will be allocated by the encoder
- pkt.size = ;
- fflush(stdout);
- /* prepare a dummy image */
- /* Y */
- for (y = ; y < c->height; y++) {
- for (x = ; x < c->width; x++) {
- frame->data[][y * frame->linesize[] + x] = x + y + i * ;
- }
- }
- /* Cb and Cr */
- for (y = ; y < c->height/; y++) {
- for (x = ; x < c->width/; x++) {
- frame->data[][y * frame->linesize[] + x] = + y + i * ;
- frame->data[][y * frame->linesize[] + x] = + x + i * ;
- }
- }
- frame->pts = i;
- /* encode the image */
- ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
- if (ret < ) {
- fprintf(stderr, "Error encoding frame\n");
- exit();
- }
- if (got_output) {
- printf("Write frame %3d (size=%5d)\n", i, pkt.size);
- fwrite(pkt.data, , pkt.size, f);
- av_free_packet(&pkt);
- }
- }
- /* get the delayed frames */
- for (got_output = ; got_output; i++) {
- fflush(stdout);
- ret = avcodec_encode_video2(c, &pkt, NULL, &got_output);
- if (ret < ) {
- fprintf(stderr, "Error encoding frame\n");
- exit();
- }
- if (got_output) {
- printf("Write frame %3d (size=%5d)\n", i, pkt.size);
- fwrite(pkt.data, , pkt.size, f);
- av_free_packet(&pkt);
- }
- }
- /* add sequence end code to have a real mpeg file */
- fwrite(endcode, , sizeof(endcode), f);
- fclose(f);
- avcodec_close(c);
- av_free(c);
- av_freep(&frame->data[]);
- av_frame_free(&frame);
- printf("\n");
- }
- /*
- * Video decoding example
- */
- static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize,
- char *filename)
- {
- FILE *f;
- int i;
- f = fopen(filename,"w");
- fprintf(f, "P5\n%d %d\n%d\n", xsize, ysize, );
- for (i = ; i < ysize; i++)
- fwrite(buf + i * wrap, , xsize, f);
- fclose(f);
- }
- static int decode_write_frame(const char *outfilename, AVCodecContext *avctx,
- AVFrame *frame, int *frame_count, AVPacket *pkt, int last)
- {
- int len, got_frame;
- char buf[];
- len = avcodec_decode_video2(avctx, frame, &got_frame, pkt);
- if (len < ) {
- fprintf(stderr, "Error while decoding frame %d\n", *frame_count);
- return len;
- }
- if (got_frame) {
- printf("Saving %sframe %3d\n", last ? "last " : "", *frame_count);
- fflush(stdout);
- /* the picture is allocated by the decoder, no need to free it */
- snprintf(buf, sizeof(buf), outfilename, *frame_count);
- pgm_save(frame->data[], frame->linesize[],
- avctx->width, avctx->height, buf);
- (*frame_count)++;
- }
- if (pkt->data) {
- pkt->size -= len;
- pkt->data += len;
- }
- return ;
- }
- static void video_decode_example(const char *outfilename, const char *filename)
- {
- AVCodec *codec;
- AVCodecContext *c= NULL;
- int frame_count;
- FILE *f;
- AVFrame *frame;
- uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
- AVPacket avpkt;
- av_init_packet(&avpkt);
- /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
- memset(inbuf + INBUF_SIZE, , FF_INPUT_BUFFER_PADDING_SIZE);
- printf("Decode video file %s to %s\n", filename, outfilename);
- /* find the mpeg1 video decoder */
- codec = avcodec_find_decoder(AV_CODEC_ID_MPEG1VIDEO);
- if (!codec) {
- fprintf(stderr, "Codec not found\n");
- exit();
- }
- c = avcodec_alloc_context3(codec);
- if (!c) {
- fprintf(stderr, "Could not allocate video codec context\n");
- exit();
- }
- if(codec->capabilities&CODEC_CAP_TRUNCATED)
- c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
- /* For some codecs, such as msmpeg4 and mpeg4, width and height
- MUST be initialized there because this information is not
- available in the bitstream. */
- /* open it */
- if (avcodec_open2(c, codec, NULL) < ) {
- fprintf(stderr, "Could not open codec\n");
- exit();
- }
- f = fopen(filename, "rb");
- if (!f) {
- fprintf(stderr, "Could not open %s\n", filename);
- exit();
- }
- frame = av_frame_alloc();
- if (!frame) {
- fprintf(stderr, "Could not allocate video frame\n");
- exit();
- }
- frame_count = ;
- for (;;) {
- avpkt.size = fread(inbuf, , INBUF_SIZE, f);
- if (avpkt.size == )
- break;
- /* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)
- and this is the only method to use them because you cannot
- know the compressed data size before analysing it.
- BUT some other codecs (msmpeg4, mpeg4) are inherently frame
- based, so you must call them with all the data for one
- frame exactly. You must also initialize 'width' and
- 'height' before initializing them. */
- /* NOTE2: some codecs allow the raw parameters (frame size,
- sample rate) to be changed at any frame. We handle this, so
- you should also take care of it */
- /* here, we use a stream based decoder (mpeg1video), so we
- feed decoder and see if it could decode a frame */
- avpkt.data = inbuf;
- while (avpkt.size > )
- if (decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, ) < )
- exit();
- }
- /* some codecs, such as MPEG, transmit the I and P frame with a
- latency of one frame. You must do the following to have a
- chance to get the last frame of the video */
- avpkt.data = NULL;
- avpkt.size = ;
- decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, );
- fclose(f);
- avcodec_close(c);
- av_free(c);
- av_frame_free(&frame);
- printf("\n");
- }
- int main(int argc, char **argv)
- {
- const char *output_type;
- /* register all the codecs */
- avcodec_register_all();
- if (argc < ) {
- printf("usage: %s output_type\n"
- "API example program to decode/encode a media stream with libavcodec.\n"
- "This program generates a synthetic stream and encodes it to a file\n"
- "named test.h264, test.mp2 or test.mpg depending on output_type.\n"
- "The encoded stream is then decoded and written to a raw data output.\n"
- "output_type must be chosen between 'h264', 'mp2', 'mpg'.\n",
- argv[]);
- return ;
- }
- output_type = argv[];
- // video_encode_example("test.h264", AV_CODEC_ID_H264);
- if (!strcmp(output_type, "h264")) {
- video_encode_example("1080P.h264", AV_CODEC_ID_H264);
- } else if (!strcmp(output_type, "mp2")) {
- audio_encode_example("test.mp2");
- audio_decode_example("test.sw", "test.mp2");
- } else if (!strcmp(output_type, "mpg")) {
- video_encode_example("test.mpg", AV_CODEC_ID_MPEG1VIDEO);
- video_decode_example("test%02d.pgm", "test.mpg");
- } else {
- fprintf(stderr, "Invalid output type '%s', choose between 'h264', 'mp2', or 'mpg'\n",
- output_type);
- return ;
- }
- return ;
- }
test.h264
下载SDL2 SDL2_image(依赖libpng1.5)
- /*
- * main.c
- *
- * Created on: Sep 16, 2016
- * Author: tla001
- */
- #include<stdio.h>
- #include <SDL2/SDL.h>
- #include <SDL2/SDL_image.h>
- void example00() ;
- int main()
- {
- SDL_Window* window =NULL;
- SDL_Renderer* render=NULL;
- SDL_Texture *texture=NULL;
- SDL_Rect src,dst;
- int width,height;
- SDL_Init(SDL_INIT_EVERYTHING);
- window=SDL_CreateWindow("hello",SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,,,SDL_WINDOW_SHOWN);
- render=SDL_CreateRenderer(window,-,SDL_RENDERER_ACCELERATED |SDL_RENDERER_PRESENTVSYNC);
- texture=IMG_LoadTexture(render,"./lufi.bmp");
- //SDL_UpdateTexture(texture);
- if(texture==NULL){
- printf("err");
- exit();
- }
- SDL_QueryTexture(texture,NULL,NULL,&width,&height);
- printf("w=%d h=%d\n",width,height);
- src.x=src.y=;
- src.w=width;
- src.h=height;
- dst.x=;
- dst.y=;
- dst.w=width/;
- dst.h=height/;
- SDL_SetRenderDrawColor(render,,,,);
- SDL_RenderClear(render);
- SDL_RenderCopy(render,texture,NULL,&src);
- SDL_RenderPresent(render);
- SDL_Delay();
- SDL_DestroyWindow(window);
- SDL_DestroyRenderer(render);
- SDL_Quit();
- // SDL_Window *pw = SDL_CreateWindow("hello1",SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,640,480,SDL_WINDOW_SHOWN);
- // SDL_Renderer *pr = SDL_CreateRenderer(pw, -1, 0);
- // SDL_Surface *ps = IMG_Load("/home/tla001/Desktop/lufi.png");
- // if(ps==NULL){
- // exit(-1);
- // }
- // SDL_Texture *pt = SDL_CreateTextureFromSurface(pr, ps);
- // SDL_RenderClear(pr);
- // SDL_Rect r;
- // r.x = 0;
- // r.y = 0;
- // r.w = 1000;
- // r.h = 1000;
- // SDL_RenderCopy(pr, pt, NULL, &r);
- // SDL_RenderPresent(pr);
- // //SDL_Flip(pw);
- // SDL_Delay(3000);
- // SDL_Quit();
- //example00() ;
- return ;
- }
- void example00()
- {
- SDL_Window *pWindow = NULL;
- SDL_Renderer*pRenderer = NULL;
- // 1. initialize SDL
- if (SDL_Init(SDL_INIT_EVERYTHING) < )
- {
- printf ("SDL initialize fail:%s\n", SDL_GetError());
- return;
- }
- // 2. create window
- pWindow = SDL_CreateWindow("example00:Setting up SDL",
- SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
- , ,
- SDL_WINDOW_SHOWN);
- if (NULL == pWindow)
- {
- printf ("Create window fail:%s\n", SDL_GetError());
- }
- // 3. create renderer
- pRenderer = SDL_CreateRenderer(pWindow, -, );
- // 4. clear the window to green
- SDL_SetRenderDrawColor(pRenderer,,,,);
- SDL_RenderClear(pRenderer);
- // 5. show the window
- SDL_RenderPresent(pRenderer);
- SDL_Delay(); // for display
- // 6. exit
- SDL_Quit();
- }
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