ffmpeg自己用到的命令记录

因为经常需要用到ffmpeg

用到的情况1：

直接用‘ffmpeg -i file.wmv %d.tif’ 不行
解决办法是：先用 ‘ffmpeg -i file.wmv %d.jpg’
然后再把图片转成tif形式
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各种乱七八糟的reference:
!!! https://blog.csdn.net/yu540135101/article/details/103025957
https://www.bookstack.cn/read/other-doc-cn-ffmpeg/ffmpeg-doc-cn-06.md

ffmpeg -i src01.avi %d.jpg
-pix_fmts
这篇还不错：https://www.ruanyifeng.com/blog/2020/01/ffmpeg.html
%d.jpg
https://zhuanlan.zhihu.com/p/67878761

ffmpeg -i hela_wbc_01.wmv -pix_fmts yuv420p%05.tif
ffmpeg -pix_fmts yuv420p -i hela_wbc_01.wmv %05.tif
ffmpeg -f rawvideo -pix_fmts yuv420p -r 25 -i hela_wbc_01.wmv -pix_fmts yuv420p %05.tif

ffmpeg -pix_fmts yuv420p -i hela_wbc_01.wmv -pix_fmts yuv420p %05.tif
FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL

---

IO... yuv420p 3 12

https://www.ixigua.com/6712306393619104259/?app=video_article&timestamp=1586254055&utm_source=copy_link&utm_medium=android&utm_campaign=client_share

我需要做的事情是把视频提取出来
具体如何完成呢？
参考代码：

ffmpeg -f rawvideo -pix_fmt yuv420p -s cif -r 25 -i YUV420p_cif.yuv -vcodec mpeg2video -pix_fmt yuv420p -r 25 -g 25 -s cif -b:v 1024k Output.mp4

ffmpeg -f rawvideo -pix_fmt yuv420p -s cif -r 25 -i YUV420p_cif.yuv -vcodec mpeg2video -pix_fmt yuv420p -r 25 -g 25 -s cif -b:v 1024k Output.mp4

视频的bit rate
color space Color space : YUV

https://blog.csdn.net/yu540135101/article/details/100727047
提取YUV数据
ffmpeg -i input.mp4 -an -c:v rawvideo -pixel_format yuv420p out.yuv
-c:v rawvideo 指定将视频转成原始数据
-pixel_format yuv420p 指定转换格式为yuv420p

播放这个
ffplay -s wxh out.yuv

YUV转H264
ffmpeg -f rawvideo -pix_fmt yuv420p -s 320x240 -r 30 -i out.yuv -c:v libx264 -f rawvideo out.h264

ffmpeg -f rawvideo -pix_fmt yuv420p -s 320x240 -r 30 -i hela_wbc_01.wmv -c:v libx264 -f rawvideo out.wmv

ffmpeg -i input.mp4 -vf hue=s=0 output.mp4
ffmpeg -i hela_wbc_01.wmv -vf hue=s=0 output.mp4

ffmpeg -i output.mp4 %d.jpg

ffmpeg -i file.wmv %d.jpg