ffmpeg-命令大全03

查看所有的解码器

ffplay -decoders >>decoders.txt

ffplay无延时无缓存播放

ffplay -fflags nobuffer -i “%1”

ffplay指定size播放

ffplay -x 480 -y 270 -i “%1”

ffplay指定解码器

ffplay -vcodec hevc_cuvid “%1”         [h264_cuvid hevc h264 mpeg4]

jetson指定解码器

ffplay -vcodec h264_nvmpi “%1”

mpv指定size播放

mpv -x –geometry=300 “%1”

mpv指定dxva2解码播放

mpv –vo=gpu –hwdec=dxva2 “%1”

[dxva2-copy/d3d11va/d3d11va-copy/nvdec/nvdec-copy/cuda/cuda-copy –vo=direct3d]

mpv指定自动GPU解码播放

mpv –vo=gpu –gpu-api=auto –hwdec=auto “%1”

%URL% 为xx.mp4或 rtsp://xx等视频源

rtp推流

ffmpeg -re -i %URL% -vcodec copy -f rtp rtp://127.0.0.1:12345

udp推流

ffmpeg -re -i %URL% -vcodec copy -f mpegts udp://127.0.0.1:12345

rtsp推流

ffmpeg -re -fflags +genpts -stream_loop -1 -i %URL% -vcodec copy -f rtsp rtsp://127.0.0.1:554

rtmp推流

ffmpeg -re -i %URL% -c copy -f flv rtmp://127.0.0.1/live

rtsp推流(640×480转码mpeg4)

ffmpeg -re -fflags +genpts -stream_loop -1 -i %URL% -vf “scale=640:480:flags=bicubic,setsar=1/1” -vcodec mpeg4 -b:v 420k -c:a aac -ac 2 -b:a 64k -r 15 -sn -map_metadata -1 -map_chapters -1 -f rtsp rtsp://127.0.0.1:554

ffmpeg测试流写入flv

ffmpeg -probesize 32768 -i “rtsp://xxx” -acodec copy -vcodec copy -f flv out.flv

subtitles

%URL% 为xx.mp4或 rtsp://xx等视频源

增加srt/ass字幕流 设默认

ffmpeg -i %URL% -i sub.srt -c copy -disposition:s:0 default out.mkv

拷贝视音频轨 增加双轨字幕流 设默认

ffmpeg -i %URL% -i %~DPsub0.ass -i %~DPsub1.ass -map 1:s -c copy -map 2:s -c copy -map 0:v -c copy -map 0:a -c copy -disposition:s:0 default -shortest out.mkv

提取srt字幕流

ffmpeg -i %URL% sub.srt

字幕流转换

1）原始文本输出

ffmpeg -i %URL% -an -vn -bsf:s mov2textsub -scodec copy -f rawvideo sub.txt

ffmpeg -i %URL% -an -vn -c:s copy -f rawvideo -map 0:s sub.txt

2）ass格式输出

ffmpeg -i %URL% -an -vn -scodec copy sub.ass

%URL% 为xx.mp4或 rtsp://xx等视频源

列出设备

ffmpeg -list_devices true -f dshow -i dummy

摄像头采集(采10秒)

ffmpeg -f dshow -i video=”Integrated Camera” -t 10 -vcodec libx264 out.mp4

列出硬解等

ffmpeg -codecs | grep cuvid

ffmpeg -hwaccels  显示所有可用的硬件加速器

分离提取音频(aac/ac3/dts)

ffmpeg -i %URL% -map 0:a:0 -acodec copy -y %~DP01.ac3

ffmpeg -i %URL% -map 0:a:1 -acodec copy -y %~DP02.aac

ac3合并0,1音频轨到视频

ffmpeg -i %URL% -i %~DP00.ac3 -i %~DP01.ac3 -map 0:v -c copy -map 1:a -c copy -map 2:a -c copy -shortest -map 0:s -scodec copy out.mkv

拷贝视音频字幕 默认字幕轨0

ffmpeg -i %URL% -map 0:v:0 -vcodec copy -map 0:a -acodec copy -map 0:s -scodec copy -disposition:s:0 default -y out.mkv

拷贝视频,音轨调换 默认音轨0

ffmpeg -i %URL% -map 0:0 -map 0:2 -map 0:1 -c copy -disposition:a:0 default -y out.mkv

-disposition:a:0 default

有时不能生效 是需要将音轨分离再合并来解决

%URL% 为xx.mp4或 rtsp://xx等视频源

WMV转264的ts

ffmpeg -i test.wmv -c:v libx264 -strict -2 1.ts

MP4转TS

ffmpeg -i 1.mp4 -vcodec copy -acodec copy -vbsf h264_mp4toannexb 1.ts

ffmpeg -i 2.mp4 -vcodec copy -acodec copy -vbsf h264_mp4toannexb 2.ts

MP4合并

ffmpeg -i “concat:1.ts|2.ts” -acodec copy -vcodec copy -absf aac_adtstoasc output.mp4

转H264/H265裸流

ffmpeg -i %URL% -codec copy -bsf: h264_mp4toannexb -f h264 out.264

ffmpeg -i %URL% -vframes 200 -r 25 -s 3840×2160 -aspect 16:9 -b:v 12000000 -vcodec hevc -y out.265

nvenc/nvenc_h264/h264_nvenc

ffmpeg -i %URL% -vcodec h264_nvenc -y out.264

hevc_nvenc/nvenc_hevc

ffmpeg -i %URL% -vcodec nvenc_hevc -y out.265

ffmpeg -i %URL% -vcodec hevc -y 265.mp4

硬解硬编

ffmpeg -c:v h264_cuvid -i input -c:v h264_nvenc -preset slow output.mkv

yuvj444p.yuv为完全取样的的YUV文件

生成yuvj444p

ffmpeg  -f lavfi -i testsrc -frames 10 -pix_fmt yuvj444p -s 320×320 yuvj444p.yuv

yuvj444p转换成422

ffmpeg -pix_fmt yuvj444p -s 320×320 -i yuvj444p.yuv -pix_fmt yuvj420p yuvj420p.yuv

yuvj444p转换成420

ffmpeg -pix_fmt yuvj444p -s 320×320 -i yuvj444p.yuv -pix_fmt yuv422p yuv422p.yuv

yuvj444p转换成411

ffmpeg -pix_fmt yuvj444p -s 320×320 -i yuvj444p.yuv -pix_fmt yuvj411p yuvj411p.yuv

yuvj444p转换成rgb24

ffmpeg -pix_fmt yuvj444p -s 320×320 -i yuvj444p.yuv -pix_fmt rgb24 yuv2rgb.rgb

rgb24转成yuvj444p

ffmpeg -s 320×320 -pix_fmt rgb24 -i yuv2rgb.rgb -pix_fmt yuvj444p -s 320×320 rgb2yuvj444p.yuv