* The buffer source output must be connected to the input pad of * the first filter described by filters_descr; since the first * filter input label is not specified, it is set to "in" by * default. */ // outputs变量意指buffersrc_ctx滤镜的输出引脚(output pad) // src缓冲区(buffersrc...
ffmpeg -i INPUT -lavfi "split [main][tmp]; [tmp] crop=iw:ih/2:0:0, vflip [flip]; [main][flip] overlay=0:H/2" OUTPUT 参数说明: -i:指定输入流; -lavfi:指定复杂滤镜图,"-lavfi"等价于"-filter_complex";2 "split [main][tmp]; [tmp] crop=iw:ih/2:0:0, vflip [flip]; [mai...
av_opt_set_int(swr_ctx, "in_sample_rate", src_rate, 0); av_opt_set_sample_fmt(swr_ctx, "in_sample_fmt", src_sample_fmt, 0); av_opt_set_int(swr_ctx, "out_channel_layout", dst_ch_layout, 0); av_opt_set_int(swr_ctx, "out_sample_rate", dst_rate, 0); av_opt_set_sa...
}#if0// 因为后面显示视频帧时有sws_scale()进行图像格式转换,故此处不设置滤镜输出格式也可enumAVPixelFormatpix_fmts[] ={ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE };// 设置输出像素格式为pix_fmts[]中指定的格式(如果要用SDL显示,则这些格式应是SDL支持格式)ret = av_opt_set...
FFmpeg重采样流程(方法二)(采用swr_convert_frame()进行重采样) 重采样的处理流程: 1、创建上下文环境:重采样过程上下文环境为SwrContext数据结构。(和上面一样) 2、参数设置:转换的参数设置到SwrContext中。SwrContext初始化:swr_init()。 3、直接采用swr_convert_frame()对输入帧和输出帧进行重采样。(不需要提前...
* As example of such codec time base see ISO/IEC 14496-2:2001(E) * vop_time_increment_resolution and fixed_vop_rate * (fixed_vop_rate == 0 implies that it is different from the framerate) * * - encoding: MUST be set by user. * - decoding: the use of this field for decoding...
设定视讯的划格率 (frame rate,单位为 Hz 或 fps,分数 或 缩写)。 例如: -r 23.976 或 -r 24000/1001 -aspect[:串流说明符] 比例 (输出,每个串流) 设定视讯的显示宽高比。需要详细设定请改用 setdar 或 stesar filter。 例如: -aspect 1.77778 或 -aspect 16:9 ...
"nal-hrd=cbr:force-cfr=1" -b:v 1M -minrate 1M -maxrate 1M -bufsize 2M <output> // VP9...
setdarSet the frame display aspect ratio. setptsSet PTS for the output video frame. setsarSet the pixel sample aspect ratio. settbSet timebase for the output link. showinfoShow textual information for each video frame. slicifyPass the images of input video on to next video filter as multiple...
-vframes number set the number of video frames to output -r rate set frame rate (Hz value, fraction or abbreviation) -fpsmax rate set max frame rate (Hz value, fraction or abbreviation) -s size set frame size (WxH or abbreviation) ...