虽然通过声明[x][y]avfilter=a=x:b=y;avfilter=xxx的方式可以创建一个可用的Filter调用链，并且在绝大多数场合下这种方式都是靠谱和实用的。...但如果想精细化的管理AVFilter调用链，例如根据某些条件来动态生成AVFilter Graph。...所有的AVFilter的初始化都可以简化为两步操作： 通过avfilter_get_by_name查找指定的AVFilter 通过avfilter_graph_create_filter初始化AVFilterContext...通过avfilter_get_by_name生成AVFilter实例之后，紧跟着就需要调用avfilter_graph_create_filter初始化上下文管理器。...按照下面的流程，依次初始化三个AVFilter: buffer_src = avfilter_get_by_name("buffer"); ret = avfilter_graph_create_filter
*bufferSrc = avfilter_get_by_name("buffer"); const AVFilter *bufferSink = avfilter_get_by_name("...buffersink"); mFilterOutputs = avfilter_inout_alloc(); mFilterInputs = avfilter_inout_alloc(...); mFilterGraph = avfilter_graph_alloc(); if (!..., args: %s", args) ret = avfilter_graph_create_filter(&mBufferScrCtx, bufferSrc, "in", args,...if (ret < 0) { avfilter_inout_free(&mFilterInputs); mFilterInputs = nullptr;
<<endl; return -1; } //创建abuffer滤镜 const AVFilter *abuffer= avfilter_get_by_name(...<<endl; return -1; } abuffersrc_ctx= avfilter_graph_alloc_filter(filter_graph,abuffer...<<endl; return -1; } //创建volume滤镜 const AVFilter *volume= avfilter_get_by_name("volume...<<endl; return -1; } //创建aformat滤镜 const AVFilter *aformat=avfilter_get_by_name("...<<endl; return -1; } //创建abuffersink滤镜 const AVFilter *abuffersink= avfilter_get_by_name
主要用到的api avfilter_register_all()：注册所有AVFilter。 avfilter_graph_alloc()：为FilterGraph分配内存。...avfilter_graph_create_filter()：创建并向FilterGraph中添加一个Filter。...avfilter_graph_parse_ptr()：将一串通过字符串描述的Graph添加到FilterGraph中。...avfilter_graph_config()：检查FilterGraph的配置。 av_buffersrc_add_frame()：向FilterGraph中加入一个AVFrame。...*buffersrc = avfilter_get_by_name("buffer"); AVFilter *buffersink = avfilter_get_by_name("buffersink
. */ typedef struct AVFilter { /** * Filter name....* * This is mainly useful for avfilter_graph_parse() / avfilter_graph_parse2(), * where it is used...通过avfilter_graph_alloc创建graph 通过avfilter_graph_create_filter创建filter context，然后通过parse，link等操作构建filter...*buffersrc = avfilter_get_by_name("buffer"); const AVFilter *buffersink = avfilter_get_by_name("...(filter_graph, NULL)) < 0) goto end; end: avfilter_inout_free(&inputs); avfilter_inout_free
滤镜由AVFilter结构实现，调用avfilter_get_by_name()函数即可获得相应的滤镜。...()和avfilter_graph_config()函数。 ...*buffersrc= avfilter_get_by_name("buffer"); const AVFilter *buffersink= avfilter_get_by_name("buffersink..."); AVFilterInOut *outputs=avfilter_inout_alloc(); AVFilterInOut *inputs=avfilter_inout_alloc...<<endl; break; } }while(0); avfilter_inout_free(&inputs); avfilter_inout_free
ffmeg 反交错 分类： 多媒体编程 2015-01-20 09:31 1037人阅读 评论(0) 收藏 举报 ffmpeg 反交错 avfilter 过滤器 昨天发现播放...在ffmpeg中,进行反交错需要用到avfilter,即图像过滤器,ffmpeg中有很多过滤器,很强大,反交错的过滤器是yadif....(); 第二步,获取要使用的过滤器: AVFilter *filter_buffer=avfilter_get_by_name(“buffer”);...AVFilter *filter_yadif=avfilter_get_by_name(“yadif”); AVFilter *filter_buffersink=avfilter_get_by_name...**filt_ctx, const AVFilter *filt, const char *name, const char *args
本次增加了一部分API: avfilter_get_by_name avfilter_inout_alloc avfilter_graph_alloc avfilter_graph_create_filter...avfilter_graph_parse_ptr av_buffersink_get_frame 初始化出入设备 和以前的操作一样，这里就不做过多叙述。...初始化buffer和buffersink 通过avfilter_get_by_name来查找相符的Filter，例如: const AVFilter *buffersrc = avfilter_get_by_name...在完成Filter Graph初始化之后，一定要通过avfilter_graph_config来验证参数配置是否正确。...avfilter_graph_config(filter_graph, NULL) 逻辑处理 在处理帧数据时，就和以前的思路基本保持一致了。
/libavfilter/avfilter.h。.../libavfilter/avfilter.h。.../libavfilter/avfilter.h。AVFilterInOut结构体主要用于avfilter_graph_parse()系列函数。...avfilter_get_by_name：创建一个指定名称的滤镜器AVFilter，位于.....* * @param name 给定的滤镜器名称，比如“buffersrc”、“buffersink” * @return AVFilter或NULL */ const AVFilter *avfilter_get_by_name
filter定义（ffmpeg4.0以上） AVFilter ff_vf_mag = { .name = "mag", .description = NULL_IF_CONFIG_SMALL...sizeof(MagContext), .priv_class = &mag_class, .activate = activate, .inputs = avfilter_vf_mag_inputs..., .outputs = avfilter_vf_mag_outputs, } typedef struct MagContext{ const AVClass * class;...outputs：filter输入输出的处理函数，可以为空 把这些函数和类定义都实现，就可以使用这个filter 2、inputs 和 outputs static const AVFilterPad avfilter_vf_mag_inputs...(mag); 这部分会定义一个唯一的class，可以在AVFilter中引用 这个宏扩展开是这样的： static const AVClass mag_class = { \
* * This is mainly useful for avfilter_graph_parse() / avfilter_graph_parse2(), * where it is used...*bufsink = avfilter_get_by_name("buffersink"); ret = avfilter_graph_create_filter(&fctx->bufsink_ctx...{ goto end; } // 3. end end: avfilter_inout_free(&inputs); avfilter_inout_free...// buffersink滤镜：缓冲视频帧，作为滤镜图的输出 const AVFilter *bufsink = avfilter_get_by_name("buffersink");...const AVFilter *bufsrc = avfilter_get_by_name(filter); // 为buffersrc滤镜创建滤镜实例buffersrc_ctx，命名为"in
filter 涉及的结构体，主要包括： FilterGraph, AVFilterGraph InputFilter, InputStream, OutputFilter, OutputStream AVFilter...static int init_filters(const char *filters_descr) { char args[512]; int ret = 0; const AVFilter...*buffersrc = avfilter_get_by_name("buffer"); const AVFilter *buffersink = avfilter_get_by_name(..."buffersink"); AVFilterInOut *outputs = avfilter_inout_alloc(); AVFilterInOut *inputs = avfilter_inout_alloc...(filter_graph, NULL)) < 0) goto end; end: avfilter_inout_free(&inputs); avfilter_inout_free
(); char args[512]; int ret = 0; AVFilter *buffersrc = avfilter_get_by_name("buffer"); AVFilter... *buffersink = avfilter_get_by_name("buffersink"); AVFilterInOut *outputs = avfilter_inout_alloc()...; AVFilterInOut *inputs = avfilter_inout_alloc(); filter_graph = avfilter_graph_alloc(); if...TSK_DEBUG_ERROR("avfilter_graph_config failed, ret:%d....\n"); isInited = 1; end: avfilter_inout_free(&inputs); avfilter_inout_free(&outputs); return
12345678910 static {System.loadLibrary("native-lib");System.loadLibrary("avcodec-57");System.loadLibrary("avfilter...string>extern "C" {#include #include #include avfilter.h...JNICALLJava_cn_gavinliu_android_ffmpeg_MainActivity_avfilterinfo(JNIEnv *env, jobject /* this */) {char info[40000] = {0};avfilter_register_all...();AVFilter *f_temp = (AVFilter *) avfilter_next(NULL);while (f_temp !
/avcodec \ -l$$PWD/FFMPEG_WIN32_LIB_4.2.2/lib/avformat \ -l$$PWD/FFMPEG_WIN32_LIB_4.2.2/lib/avfilter...avformat.h> #include #include #include avfilter.h...") #pragma comment(lib, "swscale.lib") #pragma comment(lib, "swresample.lib") #pragma comment(lib, "avfilter.lib
disable-ffprobe --disable-avdevice --disable-swresample --disable-swscale --disable-postproc --disable-avfilter...disable-ffprobe --disable-avdevice --disable-swresample --disable-swscale --disable-postproc --disable-avfilter
/ThirdLibs/${ANDROID_ABI}/libavdevice.so) add_library(avfilter SHARED IMPORTED) set_target_properties...(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/.....native-lib avcodec avdevice avfilter
enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libxvid --enable-libvorbis --enable-shared --enable-avfilter...add_executable(main demo.cpp) target_link_libraries(main -Wl,--start-group avcodec avdevice avfilter
这八个库的名字是avcodec、avdevice、avfilter、avformat、avutil、postproc、swresample、swscale，下面分别对这些库展开介绍。...3、avfilter avfilter是FFmpeg的音视频滤镜库，它包含了加工编辑音频和视频的各种滤镜包，其中音频滤镜的源码文件名形如af_***.c，视频滤镜的源码文件名形如vf_***.c。
/jniLibs/armeabi-v7a/libavdevice.a) add_library(avfilter STATIC IMPORTED) set_target_properties(avfilter...target library android log avcodec avformat avdevice avfilter
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