ffmpeg滤镜创建过程

原创

已于 2024-07-04 08:57:40 修改 · 799 阅读

CC 4.0 BY-SA版权

文章标签：

于 2024-07-04 08:57:13 首次发布

1、创建一个滤镜图	AVFilterGraph *filter_graph = avfilter_graph_alloc();
2、创建滤镜的输入和输出	AVFilterInOut inputs = avfilter_inout_alloc(); AVFilterInOut outputs = avfilter_inout_alloc();
3、每个滤镜创建上下文	AVFilterContext filter1_ctx = avfilter_graph_alloc_filter(filter_graph, filter1, "filter1"); AVFilterContext filter2_ctx = avfilter_graph_alloc_filter(filter_graph, filter2, "filter2");
4、设置滤镜参数	snprintf(args, sizeof(args), "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d", codecContext->width, codecContext->height, codecContext->pix_fmt, codecContext->time_base.num, codecC