我的Mac OS版本是macOS Catalina 10.15.1,Xcode版本是11.1,安装了Command Line Tools for Xcode 11 ,处理器是2 GHz 四核Intel Core i7,内存是8 GB 1600 MHz DDR3。 首先需要说明一下,网上有些资料可能是很久之前写的,对应的Mac OS版本也比较早,以前能用的步骤的,现在可能就不行了。下面列举几个在我的机器...
`XCode`提供了Mac平台开发环境必须的gcc编译器,要注意的是`XCode`安装后并没有命令行的gcc可用, 还需要打开`XCode`,在某个设置里添加Command Line Tools,`XCode`就会自动下载并安装好gcc, 同时还有git也被安装了。 2、安装 homebrew homebrew 是什么? `homebre`是 Mac 平台上的一个包管理工具,提供了许多 Mac ...
0. 概述 FFmpeg可通过Intel的GPU进行加速,加速器的名称是Intel Quick Sync Video,简称qsv,支持该加速器的Intel处理器的型号是带有Intel Iris graphics GPU或 HD graphics GPU的CPU,目前几乎所有Core i系列的CPU和小部分Xeon系列的CPU(E3-1285v5)有GPU,市面上常见的高密度媒体处理服务器便是基于此CPU+GPU的方式实...
Thanks to a major refactoring of the ffmpeg command-line tool, all the major components of the transcoding pipeline (demuxers, decoders, filters, encodes, muxers) now run in parallel. This should improve throughput and CPU utilization, decrease latency, and open the way to other exciting new...
笔者初步用下来确实也觉得很强大:其一是开源社区活跃,所以网上相关资料较多,尤其出现问题的时候有较多的热心网友帮忙解答;其二是FFMPEG较为成熟,FFMPEG自身天然支持CPU处理(俗称“软xx”,比如解码工作,称为软解),同时还支持各种GPU卡的硬件处理(同样举解码工作为例,称为硬解),已经查阅到的资料就包括ARM的A卡,NVDIA的...
You can set a target type using-target typeoption – type can of the following be vcd, svcd, dvd, dv, pal-vcd, or ntsc-svcd on the command line. To create a VCD, you can run the following command: ffmpeg -i video.mpg -target vcd vcd_video.mpg ...
FFmpeg is primarily a command-line application, which means you'll interact with it through the terminal or command prompt. If you're new to the command line, consider reading about thedifferences between GUI and CLIto understand the benefits of each approach. ...
PCIe bandwidth might become the bottleneck when using CPU filters. If possible, filters should run on the GPU. Several CUDA filters exist in FFmpeg that can be used as templates to implement your own high-performance CUDA filter. You can always track GPU utilization and memory transfers between...
This is a good trade-off between speed and quality when used with the cpu-used option. realtime Use realtime quality deadline. speed, cpu-used (cpu-used) Set quality/speed ratio modifier. Higher values speed up the encode at the cost of quality. nr (noise-sensitivity) static-thresh Set...
The number of lookahead frames should be at least the number of B frames + 1 to avoid CPU stalls. A lookahead of 10-20 frames is suggested for optimal quality benefits. To enable lookahead, use the -rc-lookahead N (N = number of frames) option on FFmpeg command line. Adaptive ...