其他例子

.gitignore

@@ -5,3 +5,4 @@
 /source/build-VideoDecode-Desktop_Qt_5_13_0_MSVC2017_64bit-Release
 /source/AudioDecode/AudioDecode.pro.user
 /source/build-AudioDecode-Desktop_Qt_5_13_0_MSVC2017_32bit-Release
+/source/OtherDemo/mydemo/build-TestAvFilter-Desktop_Qt_5_13_0_MSVC2017_32bit-Debug

source/OtherDemo/README.md

@@ -0,0 +1,10 @@
+# ffmpeg4.1其他demo
+
+这是Qt的工程，建议使用Qt Creator 打开
+
+Qt5.6.2(vs2013/mingw) + ffmpeg4.1  
+1.程序可以在windows/linux下直接编译使用。  
+2.windows下的库为官网直接下载的。  
+3.linux下已经编译好的库为centos7.4(64位)(gcc 版本 4.8.5)下编译的，如需32位的库请自行编译。 
+
+

source/OtherDemo/mydemo/FilterDemo/TestAvFilter.pro

@@ -0,0 +1,32 @@
+TEMPLATE = app
+CONFIG += console c++11
+CONFIG -= app_bundle
+CONFIG -= qt
+
+UI_DIR  = obj/Gui
+MOC_DIR = obj/Moc
+OBJECTS_DIR = obj/Obj
+
+
+#将输出文件直接放到源码目录下的bin目录下，将dll都放在了次目录中，用以解决运行后找不到dll的问
+#DESTDIR=$$PWD/bin/
+contains(QT_ARCH, i386) {
+    message("32-bit")
+    DESTDIR = $${PWD}/../../bin/bin32
+} else {
+    message("64-bit")
+    DESTDIR = $${PWD}/../../bin/bin64
+}
+
+include($$PWD/../../lib/lib.pri)
+
+SOURCES += src/main.cpp \
+           src/audioMix.cpp \
+           src/crop.cpp
+
+HEADERS += \
+    src/audioMix.h \
+    src/crop.h
+
+
+

source/OtherDemo/mydemo/FilterDemo/src/audioMix.cpp

@@ -0,0 +1,179 @@
+/**
+ * 叶海辉
+ * QQ群121376426
+ * http://blog.yundiantech.com/
+ */
+
+#include "audioMix.h"
+
+#ifdef _WIN32
+#define snprintf _snprintf
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+    #include <libavcodec/avcodec.h>
+//    #include <libavfilter/avfiltergraph.h>
+    #include <libavfilter/buffersink.h>
+    #include <libavfilter/buffersrc.h>
+    #include <libavutil/avutil.h>
+    #include <libavutil/imgutils.h>
+#ifdef __cplusplus
+};
+#endif
+
+int doMixAudio()
+{
+    int ret;
+    AVFrame *frame_in;
+    AVFrame *frame_out;
+    unsigned char *frame_buffer_in;
+    unsigned char *frame_buffer_out;
+
+    AVFilterContext *buffersink_ctx;
+    AVFilterContext *buffersrc_ctx;
+    AVFilterGraph *filter_graph;
+
+    //Input YUV
+    FILE *fp_in=fopen("../data/in.yuv","rb+");
+    if(fp_in==NULL){
+        printf("Error open input file.\n");
+        return -1;
+    }
+    int in_width=176;
+    int in_height=144;
+
+    //Output YUV
+    FILE *fp_out=fopen("../data/output.yuv","wb+");
+    if(fp_out==NULL){
+        printf("Error open output file.\n");
+        return -1;
+    }
+
+    //const char *filter_descr = "lutyuv='u=128:v=128'";
+    //const char *filter_descr = "boxblur";
+    //const char *filter_descr = "hflip";
+    //const char *filter_descr = "hue='h=60:s=-3'";
+//    const char *filter_descr = "crop=2/3*in_w:2/3*in_h";
+    const char *filter_descr = "crop=out_w=100:out_h=100:x=10:y=10";
+//    const char *filter_descr = "drawbox=x=100:y=100:w=100:h=100:color=pink@0.5";
+    //const char *filter_descr = "drawtext=fontfile=arial.ttf:fontcolor=green:fontsize=30:text='Lei Xiaohua'";
+
+    avfilter_register_all();
+
+    char args[512];
+    const AVFilter *buffersrc  = avfilter_get_by_name("buffer");
+//    const AVFilter *buffersink = avfilter_get_by_name("ffbuffersink");新版的ffmpeg这里要改成buffersink
+    const AVFilter *buffersink = avfilter_get_by_name("buffersink");
+    AVFilterInOut *outputs = avfilter_inout_alloc();
+    AVFilterInOut *inputs  = avfilter_inout_alloc();
+    AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
+    AVBufferSinkParams *buffersink_params;
+
+    filter_graph = avfilter_graph_alloc();
+
+    /* buffer video source: the decoded frames from the decoder will be inserted here. */
+    snprintf(args, sizeof(args),
+        "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
+        in_width,in_height,AV_PIX_FMT_YUV420P,
+        1, 25,1,1);
+
+    ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
+        args, NULL, filter_graph);
+    if (ret < 0) {
+        printf("Cannot create buffer source\n");
+        return ret;
+    }
+
+    /* buffer video sink: to terminate the filter chain. */
+    buffersink_params = av_buffersink_params_alloc();
+    buffersink_params->pixel_fmts = pix_fmts;
+    ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
+        NULL, buffersink_params, filter_graph);
+    av_free(buffersink_params);
+    if (ret < 0) {
+        char str[AV_ERROR_MAX_STRING_SIZE] = {0};
+        av_make_error_string(str, AV_ERROR_MAX_STRING_SIZE, ret);
+        printf("Cannot create buffer sink %d %s\n", ret, str);
+        return ret;
+    }
+
+    /* Endpoints for the filter graph. */
+    outputs->name       = av_strdup("in");
+    outputs->filter_ctx = buffersrc_ctx;
+    outputs->pad_idx    = 0;
+    outputs->next       = NULL;
+
+    inputs->name       = av_strdup("out");
+    inputs->filter_ctx = buffersink_ctx;
+    inputs->pad_idx    = 0;
+    inputs->next       = NULL;
+
+    if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_descr,
+        &inputs, &outputs, NULL)) < 0)
+        return ret;
+
+    if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
+        return ret;
+
+    frame_in=av_frame_alloc();
+    frame_buffer_in=(unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, in_width,in_height,1));
+    av_image_fill_arrays(frame_in->data, frame_in->linesize,frame_buffer_in,
+        AV_PIX_FMT_YUV420P,in_width, in_height,1);
+
+    frame_out=av_frame_alloc();
+    frame_buffer_out=(unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, in_width,in_height,1));
+    av_image_fill_arrays(frame_out->data, frame_out->linesize,frame_buffer_out,
+        AV_PIX_FMT_YUV420P,in_width, in_height,1);
+
+    frame_in->width=in_width;
+    frame_in->height=in_height;
+    frame_in->format=AV_PIX_FMT_YUV420P;
+
+    while (1) {
+
+        if(fread(frame_buffer_in, 1, in_width*in_height*3/2, fp_in)!= in_width*in_height*3/2){
+            break;
+        }
+        //input Y,U,V
+        frame_in->data[0]=frame_buffer_in;
+        frame_in->data[1]=frame_buffer_in+in_width*in_height;
+        frame_in->data[2]=frame_buffer_in+in_width*in_height*5/4;
+
+        if (av_buffersrc_add_frame(buffersrc_ctx, frame_in) < 0) {
+            printf( "Error while add frame.\n");
+            break;
+        }
+
+        /* pull filtered pictures from the filtergraph */
+        ret = av_buffersink_get_frame(buffersink_ctx, frame_out);
+        if (ret < 0)
+            break;
+
+        //output Y,U,V
+        if(frame_out->format==AV_PIX_FMT_YUV420P){
+            for(int i=0;i<frame_out->height;i++){
+                fwrite(frame_out->data[0]+frame_out->linesize[0]*i,1,frame_out->width,fp_out);
+            }
+            for(int i=0;i<frame_out->height/2;i++){
+                fwrite(frame_out->data[1]+frame_out->linesize[1]*i,1,frame_out->width/2,fp_out);
+            }
+            for(int i=0;i<frame_out->height/2;i++){
+                fwrite(frame_out->data[2]+frame_out->linesize[2]*i,1,frame_out->width/2,fp_out);
+            }
+        }
+        printf("Process 1 frame!\n");
+        av_frame_unref(frame_out);
+    }
+
+    fclose(fp_in);
+    fclose(fp_out);
+
+    av_frame_free(&frame_in);
+    av_frame_free(&frame_out);
+    avfilter_graph_free(&filter_graph);
+
+    return 0;
+}

source/OtherDemo/mydemo/FilterDemo/src/audioMix.h

@@ -0,0 +1,16 @@
+/**
+ * 叶海辉
+ * QQ群121376426
+ * http://blog.yundiantech.com/
+ */
+
+#pragma once
+
+/***
+ * 混音例子
+ *
+ * @brief doCrop
+ * @return
+ */
+int doMixAudio();
+

source/OtherDemo/mydemo/FilterDemo/src/crop.cpp

@@ -0,0 +1,179 @@
+/**
+ * 叶海辉
+ * QQ群121376426
+ * http://blog.yundiantech.com/
+ */
+
+#include "crop.h"
+
+#ifdef _WIN32
+#define snprintf _snprintf
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+    #include <libavcodec/avcodec.h>
+//    #include <libavfilter/avfiltergraph.h>
+    #include <libavfilter/buffersink.h>
+    #include <libavfilter/buffersrc.h>
+    #include <libavutil/avutil.h>
+    #include <libavutil/imgutils.h>
+#ifdef __cplusplus
+};
+#endif
+
+int doCrop()
+{
+    int ret;
+    AVFrame *frame_in;
+    AVFrame *frame_out;
+    unsigned char *frame_buffer_in;
+    unsigned char *frame_buffer_out;
+
+    AVFilterContext *buffersink_ctx;
+    AVFilterContext *buffersrc_ctx;
+    AVFilterGraph *filter_graph;
+
+    //Input YUV
+    FILE *fp_in=fopen("../data/in.yuv","rb+");
+    if(fp_in==NULL){
+        printf("Error open input file.\n");
+        return -1;
+    }
+    int in_width=176;
+    int in_height=144;
+
+    //Output YUV
+    FILE *fp_out=fopen("../data/output.yuv","wb+");
+    if(fp_out==NULL){
+        printf("Error open output file.\n");
+        return -1;
+    }
+
+    //const char *filter_descr = "lutyuv='u=128:v=128'";
+    //const char *filter_descr = "boxblur";
+    //const char *filter_descr = "hflip";
+    //const char *filter_descr = "hue='h=60:s=-3'";
+//    const char *filter_descr = "crop=2/3*in_w:2/3*in_h";
+    const char *filter_descr = "crop=out_w=100:out_h=100:x=10:y=10";
+//    const char *filter_descr = "drawbox=x=100:y=100:w=100:h=100:color=pink@0.5";
+    //const char *filter_descr = "drawtext=fontfile=arial.ttf:fontcolor=green:fontsize=30:text='Lei Xiaohua'";
+
+    avfilter_register_all();
+
+    char args[512];
+    const AVFilter *buffersrc  = avfilter_get_by_name("buffer");
+//    const AVFilter *buffersink = avfilter_get_by_name("ffbuffersink");新版的ffmpeg这里要改成buffersink
+    const AVFilter *buffersink = avfilter_get_by_name("buffersink");
+    AVFilterInOut *outputs = avfilter_inout_alloc();
+    AVFilterInOut *inputs  = avfilter_inout_alloc();
+    AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
+    AVBufferSinkParams *buffersink_params;
+
+    filter_graph = avfilter_graph_alloc();
+
+    /* buffer video source: the decoded frames from the decoder will be inserted here. */
+    snprintf(args, sizeof(args),
+        "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
+        in_width,in_height,AV_PIX_FMT_YUV420P,
+        1, 25,1,1);
+
+    ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
+        args, NULL, filter_graph);
+    if (ret < 0) {
+        printf("Cannot create buffer source\n");
+        return ret;
+    }
+
+    /* buffer video sink: to terminate the filter chain. */
+    buffersink_params = av_buffersink_params_alloc();
+    buffersink_params->pixel_fmts = pix_fmts;
+    ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
+        NULL, buffersink_params, filter_graph);
+    av_free(buffersink_params);
+    if (ret < 0) {
+        char str[AV_ERROR_MAX_STRING_SIZE] = {0};
+        av_make_error_string(str, AV_ERROR_MAX_STRING_SIZE, ret);
+        printf("Cannot create buffer sink %d %s\n", ret, str);
+        return ret;
+    }
+
+    /* Endpoints for the filter graph. */
+    outputs->name       = av_strdup("in");
+    outputs->filter_ctx = buffersrc_ctx;
+    outputs->pad_idx    = 0;
+    outputs->next       = NULL;
+
+    inputs->name       = av_strdup("out");
+    inputs->filter_ctx = buffersink_ctx;
+    inputs->pad_idx    = 0;
+    inputs->next       = NULL;
+
+    if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_descr,
+        &inputs, &outputs, NULL)) < 0)
+        return ret;
+
+    if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
+        return ret;
+
+    frame_in=av_frame_alloc();
+    frame_buffer_in=(unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, in_width,in_height,1));
+    av_image_fill_arrays(frame_in->data, frame_in->linesize,frame_buffer_in,
+        AV_PIX_FMT_YUV420P,in_width, in_height,1);
+
+    frame_out=av_frame_alloc();
+    frame_buffer_out=(unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, in_width,in_height,1));
+    av_image_fill_arrays(frame_out->data, frame_out->linesize,frame_buffer_out,
+        AV_PIX_FMT_YUV420P,in_width, in_height,1);
+
+    frame_in->width=in_width;
+    frame_in->height=in_height;
+    frame_in->format=AV_PIX_FMT_YUV420P;
+
+    while (1) {
+
+        if(fread(frame_buffer_in, 1, in_width*in_height*3/2, fp_in)!= in_width*in_height*3/2){
+            break;
+        }
+        //input Y,U,V
+        frame_in->data[0]=frame_buffer_in;
+        frame_in->data[1]=frame_buffer_in+in_width*in_height;
+        frame_in->data[2]=frame_buffer_in+in_width*in_height*5/4;
+
+        if (av_buffersrc_add_frame(buffersrc_ctx, frame_in) < 0) {
+            printf( "Error while add frame.\n");
+            break;
+        }
+
+        /* pull filtered pictures from the filtergraph */
+        ret = av_buffersink_get_frame(buffersink_ctx, frame_out);
+        if (ret < 0)
+            break;
+
+        //output Y,U,V
+        if(frame_out->format==AV_PIX_FMT_YUV420P){
+            for(int i=0;i<frame_out->height;i++){
+                fwrite(frame_out->data[0]+frame_out->linesize[0]*i,1,frame_out->width,fp_out);
+            }
+            for(int i=0;i<frame_out->height/2;i++){
+                fwrite(frame_out->data[1]+frame_out->linesize[1]*i,1,frame_out->width/2,fp_out);
+            }
+            for(int i=0;i<frame_out->height/2;i++){
+                fwrite(frame_out->data[2]+frame_out->linesize[2]*i,1,frame_out->width/2,fp_out);
+            }
+        }
+        printf("Process 1 frame!\n");
+        av_frame_unref(frame_out);
+    }
+
+    fclose(fp_in);
+    fclose(fp_out);
+
+    av_frame_free(&frame_in);
+    av_frame_free(&frame_out);
+    avfilter_graph_free(&filter_graph);
+
+    return 0;
+}

source/OtherDemo/mydemo/FilterDemo/src/crop.h

@@ -0,0 +1,18 @@
+/**
+ * 叶海辉
+ * QQ群121376426
+ * http://blog.yundiantech.com/
+ */
+
+#ifndef CROP_H
+#define CROP_H
+
+/***
+ * 图像裁剪例子
+ *
+ * @brief doCrop
+ * @return
+ */
+int doCrop();
+
+#endif // CROP_H

source/OtherDemo/mydemo/FilterDemo/src/main.cpp

@@ -0,0 +1,15 @@
+/**
+ * 叶海辉
+ * QQ群121376426
+ * http://blog.yundiantech.com/
+ */
+
+#include <stdio.h>
+#include "crop.h"
+
+int main(int argc, char* argv[])
+{
+    doCrop();
+
+    return 0;
+}