# convert to other formats # set -euo pipefail image_formats="jpg png bmp gif webp tiff jp2" input_dir="/home/vivi/kvmshare/图片" formats=$image_formats output_dir="${input_dir}_output" function do_convert(){ local input_file=$1 # 字符串替换,样例 # input=/home/vivi/kvmshare/图片...
ffmpeg -i in.png -vf format=yuva444p,geq='if(lte(alpha(X,Y),16),255,p(X,Y))':'if(lte(alpha(X,Y),16),128,p(X,Y))':'if(lte(alpha(X,Y),16),128,p(X,Y))' out.jpg If your alpha is a pure black and white image, change 16 to 1. Share Follow edited Dec 28, ...
(RGB888)); return picture; } //将图片数据写入到文件中 //根据文件后缀来确定图片的格式,支持png和jpg int SavePictureToFile(const PICTURE *pic, const char *path) { int ret = 0; int error_code = 0; const AVCodec *codec = NULL; AVCodecContext *codec_ctx = NULL; AVFrame *frame = NULL...
publicclassVideoConverter{publicvoidConvertToImages(stringvideoPath,stringoutputFolder,intframeRate){stringffmpegPath ="path_to_ffmpeg_executable";// 替换为你自己的FFmpeg可执行文件的路径stringoutputFileName ="frame_%d.png";// 输出图片的文件名格式ProcessStartInfo startInfo =newProcessStartInfo;startInfo.Fil...
I would like to use avconv to convert a series of PNG images to a WebM video, preserving transparency. I understand that the pixel format used in the output video must support transparency. So I tried: $ avconv -framerate 25 -f image2 -i frames/%03d.png -pix_fmt yuva420p output....
截取一张 300x200 尺寸大小的格式为 jpg 的一张图片: ./ffmpeg –i test.avi –y –f image2 –t 0.001 –s 300x200 test.jpg 要截取指定时间的图片, 如 5 秒之后的: ./ffmpeg –i test.avi –y –f image2 –ss 5 –t 0.001 –s 300x200 test.jpg ...
[buffer @ 0x257cee0] Error setting option video_size to value 0x0. [graph 0 input from stream 0:0 @ 0x257cb20] Error applying options to the filter. Error opening filters! ffmpeg -f concat -safe 0 -i <(cat <<EOF file '$(pwd)/image01.png' ...
第一步:导入ImageSequenceClip模块 首先,我们需要导入一个模块,叫做ImageSequenceClip。这个模块是moviepy库...
intswr_convert_frame(SwrContext*swr,// 转码上下文AVFrame*output,// 转码后输出到这个AVFrameconstAVFrame*input// 原始输入AVFrame); 这个方法要求输入输出的AVFrame都设置了channel_layout、 sample_rate、format参数,然后回调用av_frame_get_buffer为output创建数据buff: ...
在线演示demo:javacpp-FFmpeg系列补充:FFmpeg拉流截图实现在线演示demo(视频截图并返回base64图像,支持jpg/png/gif/bmp等多种格式)_eguid-CSDN博客_base64 ffmpeg 项目维护地址:GitHub - eguid/easyCV: easyCV (video recorder and snapshot library,based on javaCV)基于javaCV的跨平台视频录像和基于FFmpeg的快照(截...