ffmpeg -i2022.02.10.mp4 -r25./frames_%04d.png ffmpeg -f image2 -r25-i frames_%04d.png -c:v libx264 -pix_fmt yuv420p out2.mp4 ffmpeg -i test.mp4 -vcodec libx264 -x264opts"bframes=0"-strict -2test-out.mp4 去掉无效视频帧...
举个栗子: --disable-encoders--enable-encoder=h263--enable-encoder=libx264--enable-encoder=aac--enable-encoder=mpeg4--enable-encoder=mjpeg--enable-encoder=png--enable-encoder=gif--enable-encoder=bmp--disable-muxers--enable-muxer=h264--enable-muxer=flv--enable-muxer=gif--enable-muxer=mp3...
所以,我想要将png图片直接封装成mp4是不可以的,需要解码,解码之后得到的是png的yuv格式数据,需要将png格式的yuv数据(带透明通道)转换成yuv420的格式数据,才能够将编码封装成的mp4正确播放,否则生成的mp4播放内容是错误的。 代码 一下代码不包含png格式的yux数据转换成yuv420的转换功能,只是一个png转mp4的流程框架。
按照处理数据的类型，通常多媒体的filter分为：● 音频filter ● 视频filter ● 字幕filter ...
ffmpeg -framerate 1/5 -i D:\png\img%03d.png -r 24 D:\png\ok.mp4 将视频ok.mp4转为.jpg格式的图片,并且指定每秒提取10帧为图片。 ffmpeg -i ok.mp4 -filter_complex "fps=1/6" img%03d.jpg FFmpeg图片与视频相互转换命令 命令简介
ffmpeg -r 1/5 -i pic-%02d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 (2).Scale the Movie As the final movie was >4k, my TV wasn’t able to play it, so I in the last step I had to scale it down to an appropriate resolution of 720p: ...
ffmpeg -r 1/5 -i pic-%02d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 (2).Scale the Movie As the final movie was >4k, my TV wasn’t able to play it, so I in the last step I had to scale it down to an appropriate resolution of 720p: ...
(1).PNG’s to MP4 ffmpeg -r 1/5 -i pic-%02d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 (2).Scale the Movie As the final movie was >4k, my TV wasn’t able to play it, so I in the last step I had to scale it down to an appropriate resolution of 720p: ...
bitmap.Save(ms,ImageFormat.Png); ms.WriteTo(_proc.StandardInput.BaseStream); } } } /// /// 异步线程启动服务 /// publicoverridevoidStartAsync() { _isRunning=true; } /// /// 停止服务 /// publicoverridevoidStop() { _isRunning=false...
上面BMP和PNG结果不同也是因为PNG用的是rgb24的pixel format,而BMP是bgr24。 既然知道了问题所在,我们只需要先转换一次即可,把上面的vf前再串一个format: -vf format=rgb24,scale=out_color_matrix=bt709,format=yuv420p 就可以啦!那么上面提到的其他几种转换滤镜,有没有同样的问题呢? colormatrix:同样的bug,...