-b bitrate video bitrate (please use -b:v)设置视频比特率 -dn disable data禁止数据缓存 Audio options:音频选项 -aframes number set the number of audio frames to output设置输出多少帧音频 -aq quality set audio quality (codec-specific)设置音频质量 -ar rate set audio sampling rate (in Hz)设置...
Video options: -vframes numbersetthe number of video frames to output#设置要输出的视频帧数-r ratesetframe rate(Hz value, fraction or abbreviation)#设置帧速率(Hz值,分数或缩写)-s sizesetframe size(WxH or abbreviation)#指定分辨率(WxH或缩写)(320x240)-aspect aspectsetaspect ratio(4:3, 16:9 o...
-b bitrate video bitrate (please use -b:v) 设置视频比特率 -dn disable data 禁止数据缓存 Audio options: 音频选项 -aframes number set the number of audio frames to output 设置输出多少帧音频 -aq quality set audio quality (codec-specific) 设置音频质量 -ar rate set audio sampling rate (in H...
3、Global options (affect whole program instead of just one file:(全局选项(影响整个程序,而不仅仅是一个文件:)) -loglevel loglevel 设置日志记录级别 -v loglevel 设置日志记录级别 -report 生成报告 -max_alloc bytes 设置单个分配块的最大大小 -opencl_options 设置OpenCL环境选项 -y 覆盖输出文件 -n...
-vf filter_graph set video filters -ab bitrate audio bitrate (please use -b:a) -b bitrate video bitrate (please use -b:v) -dn disable data Audio options: -aframesnumber set the number of audio frames to output -aq quality set audio quality (codec-specific) ...
ffmpeg -i source_video.avi -b 300 -s 320x240 -vcodec xvid -ab 32 -ar 24000 -acodec aac final_video.mp4 说明: * 源视频:source_video.avi * 音频编码:aac * 音频位率:32kb/s * 视频编码:xvid * 视频位率:1200kb/s * 视频尺寸:320 X 180 ...
-vframes number set the number of video frames to output 1. 关于q:v命令在encoders.texi中可以找到描述,q为quality的首字母, v推测为VBR的首字母。格式为[options]:[options specifier] [option value] Set maximum constant quality (VBR) encoding with @command{ffmpeg}: ...
-vf filter_graph set video filters -ab bitrate audio bitrate (please use -b:a) -b bitrate video bitrate (please use -b:v) -dn disable data Audio options: -aframes number set the number of audio frames to output -aq quality set audio quality (codec-specific) ...
Video options: -b bitrate set bitrate (in bits/s) -vb bitrate set bitrate (in bits/s) -vframes number set the number of video frames to record -r rate set frame rate (Hz value, fraction or abbreviation) -s size set frame size (WxH or abbreviation) ...
-vstats_file file dump video coding statistics to file -dc precision intra_dc_precision -qphist show QP histogram -vc channel deprecated, use -channel -tvstd standard deprecated, use -standard -isync this option is deprecated and does nothing ...