1 How to reduce output file size with ffmpeg? 0 Reduce file size of ffmpeg converted video 1 decreasing video resolution using ffmpeg increases file size 0 Make a video 10h long while keeping it lightweight in filesize 3 Reduce bitrate of video with ffmpeg Hot Network Questions Were ...
通过av_reduce计算得到,PAR * SAR = DAR,其中 PAR 是 Pixel Aspect Ratio,表示单个像素的宽高比,大多数情况像素宽高比为 1:1,也就是一个正方形像素,如果不是 1:1,则该像素可以理解为长方形像素。 pix_fmt:像素格式,对应av_get_pix_fmt_name(AVStream->codecpar->format)。 level:编码参数,对应AVStream-...
Reduce .mov File Size: 通过这个命令可以对目标视频文件的大小进行有效裁剪。 ffmpeg-i in.mov -c:v libx264 -c:acopy -crf20out.mov Convert .move To .mp4 通过这个简单的命令可以完成视频的转码,在未来的测试过程中,这个将会经常用到,可以便捷的提供测试物料资源。 ffmpeg -iin.mov -vcodeccopy-acodec ...
Reduce .mov File Size: 通过这个命令可以对目标视频文件的大小进行有效裁剪。 代码语言:javascript 复制 ffmpeg-iin.mov-c:v libx264-c:acopy-crf20out.mov Convert .move To .mp4 通过这个简单的命令可以完成视频的转码,在未来的测试过程中,这个将会经常用到,可以便捷的提供测试物料资源。 代码语言:javascript ...
-slice-max-size <int> E..V... Limit the size of each slice in bytes (from -1 to INT_MAX) (default -1) -stats <string> E..V... Filename for 2 pass stats -nal-hrd <int> E..V... Signal HRD information (requires vbv-bufsize; cbr not allowed in .mp4) (from -1 to INT...
Reduce fluctuations in QP (after curve compression) [0.5] –zones /(x264) UNKNOWN (FFmpeg) Allows setting a specific quantizer for a specific region of video. –qpfile (x264) UNKNOWN (FFmpeg) Allows one to read in a set of frametypes and quantizers from a file. Useful for testing vari...
av_reduce(&dar.num, &dar.den, par->width * sar.num, par->height * sar.den, 1024*1024); 查看音视频文件的数据包信息 // -select_streams表示选择音频或者视频 ffprobe -show_format [-select_streams audio | video] inputFile 首先看下视频流的第一个Packet和第二个Packet: ...
Reduce fluctuations in QP (after curve compression) [0.5] –zones /(x264) UNKNOWN (FFmpeg) Allows setting a specific quantizer for a specific region of video. –qpfile (x264) UNKNOWN (FFmpeg) Allows one to read in a set of frametypes and quantizers from a file. Useful for testing vari...
很多读者可能会问，我们是做移动端的开发，为什么要学习FFmpeg 命令行工具？其实客户端是可以直接调用...
reduce buffering -probesize <int> .D... set probing size (from 32 to INT_MAX) (default 5e+006) -packetsize <int> E... set packet size (from 0 to INT_MAX) (default 0) -fflags <flags> ED... (default 200) flush_packets .D... reduce the latency by flushing out packets immediat...