[1]ffmpeg.org/libavfilter documentation [2]ffmpeg.org/Filters Documentation [3]FFmpeg/doc/examples/filtering_video.c [4]雷霄骅/最简单的基于FFmpeg的AVfilter例子(水印叠加) 2.示例说明 FFmpeg中的libavfilter提供了一个通用的音视频filter框架。使用avfilter可以对音视频数据做一些效果处理如去色调、模糊、水平翻...
and there can be multiple links between a pair of filters. Each link has one input pad on one side connecting it to one filter from which it takes its input, and one output pad on the other side connecting it to one filter accepting its output. ...
intmain(int argc,char**argv){// ...初始化相关变量,包括原始frame,过滤器处理结果filt_frame,packet等// 打开输入file,查找视频stream,打开解码器等if((ret=open_input_file(argv[1]))<0)goto end;// 初始化过滤器相关if((ret=init_filters(filter_descr))<0)goto end;while(1){// 读包av_read_...
To keep only the part that matches all the constraints at once, chain multiple atrim filters. The defaults are such that all the input is kept. So it is possible to set e.g. just the end values to keep everything before the specified time. Examples: • Drop everything except the ...
* A link between two filters. This contains pointers to the source and * destination filters between which this link exists, and the indexes of * the pads involved. In addition, this link also contains the parameters * which have been negotiated and agreed upon between the filter, such as ...
[2]ffmpeg.org/Filters Documentation [3]FFmpeg/doc/examples/filter_audio.c [4]FFmpeg libavfilter使用示例-filtering video 2. 示例说明 FFmpeg中的libavfilter提供了一个通用的音视频filter框架。使用avfilter可以对音视频数据做一些效果处理如去色调、模糊、水平翻转、裁剪、加方框、叠加文字等功能。
Audio 混音实现 从FFMPEG原生代码doc/examples/filtering_audio.c修改而来。 ffmpeg版本信息 代码实现: filter工作是通过递归的方式工作,递归主要在ff_filter_graph_run_once函数里面实现。 补充两个图: filter的pipel
to be sent to filters */ int64_t start; /* time when read started */ /* predicted dts of the next packet read for this stream or (when there are * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */ int64_t next_dts; int64_t dts; /...
22/** An instance of a filter */structAVFilterContext{constAVClass *av_class;///< needed for av_log() and filters common optionsconstAVFilter *filter;///< the AVFilter of which this is an instancechar*name;///< name of this filter instanceAVFilterPad *input_pads;///< array of input...
[2]ffmpeg.org/Filters Documentation [3]FFmpeg/doc/examples/filtering_video.c [4]雷霄骅/最简单的基于FFmpeg的AVfilter例子(水印叠加) [5]FFmpeg libavfilter使用示例-处理YUV格式数据 [6]FFmpeg解封装解码 [7]stackoverflow/What does printf(“\033c” ) mean?