声明：本文所述内容都是从http://blog.csdn.net/u011475134/article/details/71023612博文中学习而来。
背景：
一同学想通过FQ软件下载一些youtube的视频，于是我就帮忙找解决方案，发现了上述博客的文章，试了一试果然凑效，就记录下了这一收货。
环境搭建：
本机是win7 x64版本
1）python环境安装：
请参考我的博文《Python:安装mssql模块功能，并实现与sqlserver连接、查询》
2）使用pip安装yutube-dl
四方建+r，打开“运行”窗口，窗口中输入cmd,回车进入cmd运行环境下，执行以下安装命令：
pip install youtube-dl
C:\Users\Administrator>pip install youtube-dl Collecting youtube-dl Downloading youtube_dl-2017.9.15-py2.py3-none-any.whl (1.6MB) 16% |¨€¨€¨€¨€¨€¨… | 276kB 19kB/s eta 0:01:10 19% |¨€¨€¨€¨€¨€¨€¨? | 317kB 16kB/s eta 0:01:2 20% |¨€¨€¨€¨€¨€¨€¨… | 327kB 12kB/s eta 0:01: 20% |¨€¨€¨€¨€¨€¨€¨? | 337kB 12kB/s eta 0:01:4 21% |¨€¨€¨€¨€¨€¨€¨? | 348kB 14kB/s eta 0:01:3 21% |¨€¨€¨€¨€¨€¨€¨€ | 358kB 14kB/s eta 0:01:3 22% |¨€¨€¨€¨€¨€¨€¨€¨? | 368kB 13kB/s eta 0:01 23% |¨€¨€¨€¨€¨€¨€¨€¨… | 378kB 11kB/s eta 0:0 23% |¨€¨€¨€¨€¨€¨€¨€¨? | 389kB 11kB/s eta 0:01 24% |¨€¨€¨€¨€¨€¨€¨€¨? | 399kB 14kB/s eta 0:01 25% |¨€¨€¨€¨€¨€¨€¨€¨€ | 409kB 11kB/s eta 0:01 25% |¨€¨€¨€¨€¨€¨€¨€¨€¨? | 419kB 12kB/s eta 0: 26% |¨€¨€¨€¨€¨€¨€¨€¨€¨… | 430kB 16kB/s eta 0 26% |¨€¨€¨€¨€¨€¨€¨€¨€¨? | 440kB 16kB/s eta 0: 27% |¨€¨€¨€¨€¨€¨€¨€¨€¨? | 450kB 23kB/s eta 0: 28% |¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 460kB 19kB/s eta 0: 28% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 471kB 23kB/s eta 29% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 481kB 24kB/s eta 30% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 491kB 18kB/s eta 30% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 501kB 20kB/s eta 31% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 512kB 25kB/s eta 31% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 522kB 25kB/s et 32% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 532kB 19kB/s e 33% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 542kB 19kB/s et 33% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 552kB 19kB/s et 34% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 563kB 21kB/s et 35% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 573kB 19kB/s 35% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 583kB 22kB/s 36% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 593kB 24kB/s 36% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 604kB 25kB/s 37% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 614kB 23kB/s 38% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 624kB 21kB/ 38% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 634kB 28kB 39% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 645kB 19kB/ 40% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 655kB 11kB/ 40% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 665kB 11kB/ 41% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 675kB 8.9 41% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 686kB 8. 42% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 696kB 8.4 43% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 706kB 6.8 43% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 716kB 7.1 44% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 727kB 6 45% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 737kB 45% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 747kB 6 46% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 757kB 7 46% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 768kB 7 47% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 778kB 48% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 788k 48% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 798kB 49% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 808kB 50% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 819kB 50% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 829 51% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 83 52% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 849 52% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 860 53% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 870 53% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 8 54% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨… | 55% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 9 55% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 9 56% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 9 57% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 57% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 58% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 58% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? | 59% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ | 60% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 60% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 61% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 62% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 62% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ 63% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 63% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 64% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 65% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 65% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ 66% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 67% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 67% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 68% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 68% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ 69% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 70% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 70% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 71% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨? 72% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ 72% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 73% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 73% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 74% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 75% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 75% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 76% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 77% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 77% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 78% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 78% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 79% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 80% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 80% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 81% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 82% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 82% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 83% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 83% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 84% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 85% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 85% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 86% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 87% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 87% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 88% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 88% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 89% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 90% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 90% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 91% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 92% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 92% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 93% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 93% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 94% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 95% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 95% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 96% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 97% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 97% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 98% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 98% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 99% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨ 100% |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€ ¨€¨€¨€¨€¨€¨€¨€¨€¨€| 1.6MB 5.7kB/s Installing collected packages: youtube-dl Successfully installed youtube-dl-2017.9.15 C:\Users\Administrator>
验证是否安装成功：
C:\Users\Administrator>youtube-dl Usage: youtube-dl [OPTIONS] URL [URL...] youtube-dl: error: You must provide at least one URL. Type youtube-dl --help to see a list of all options.
3）下载ffmpeg组件：
备注:
如果不需要音频与视频文件合并时，是不需要安装该组件的。
官网地址：http://ffmpeg.org/
下载后，我把它解压到了D盘根目录下D:\ffmpeg-20170915-6743351-win64-static，找到目录：
将地址“D:\ffmpeg-20170915-6743351-win64-static\bin”追加到环境变量PATH后边，之后打开cmd运行窗口下运行ffmpeg -version来查看是否安装成功：
4）FQ软件下载运行：
同学给的FQ软件，下载后直接解压运行即可，IE下找到它的默认代理ip及端口号，记录下，后边有可能需要使用：
使用youtube-dl下载
1）打开“FQ”软件来启用系统代理，系统代理模式设置为全局模式，打开cmd，输入youtube-dl -F youtube视频链接，回车，会显示该视频可以下载的视频格式与分辨率。
youtube-dl -F http://www.youtube.com/watch?v=ozVRGho-cZQ 或者 youtube-dl --proxy socks5://127.0.0.1:8580 -F http://www.youtube.com/watch?v=ozVRGho-cZQ
youtube-dl -f https://www.youtube.com/watch?v=ozVRGho-cZQ [youtube] ozVRGho-cZQ: Downloading webpage [youtube] ozVRGho-cZQ: Downloading video info webpage [youtube] ozVRGho-cZQ: Extracting video information [youtube] ozVRGho-cZQ: Downloading MPD manifest [info] Available formats for ozVRGho-cZQ: format code extension resolution note 139 m4a audio only DASH audio 48k , m4a_dash container, mp4a.40.5@ 48k (22050Hz), 1.51MiB 249 webm audio only DASH audio 51k , opus @ 50k, 1.55MiB 250 webm audio only DASH audio 68k , opus @ 70k, 1.98MiB 171 webm audio only DASH audio 109k , vorbis@128k, 2.89MiB 140 m4a audio only DASH audio 128k , m4a_dash container, mp4a.40.2@128k (44100Hz), 4.03MiB 251 webm audio only DASH audio 143k , opus @160k, 4.32MiB 278 webm 256x144 144p 109k , webm container, vp9, 30fps, video only, 2.96MiB 160 mp4 256x144 DASH video 114k , avc1.4d400c, 30fps, video only, 3.50MiB 242 webm 426x240 240p 243k , vp9, 30fps, video only, 5.76MiB 133 mp4 426x240 DASH video 270k , avc1.4d4015, 30fps, video only, 7.80MiB 243 webm 640x360 360p 437k , vp9, 30fps, video only, 10.67MiB 134 mp4 640x360 DASH video 641k , avc1.4d401e, 30fps, video only, 13.68MiB 244 webm 854x480 480p 803k , vp9, 30fps, video only, 19.60MiB 135 mp4 854x480 DASH video 1176k , avc1.4d401f, 30fps, video only, 30.49MiB 247 webm 1280x720 720p 1707k , vp9, 30fps, video only, 42.08MiB 136 mp4 1280x720 DASH video 2349k , avc1.4d401f, 30fps, video only, 64.04MiB 248 webm 1920x1080 1080p 3149k , vp9, 30fps, video only, 79.04MiB 137 mp4 1920x1080 DASH video 4457k , avc1.640028, 30fps, video only, 127.32MiB 17 3gp 176x144 small , mp4v.20.3, mp4a.40.2@ 24k 36 3gp 320x180 small , mp4v.20.3, mp4a.40.2 43 webm 640x360 medium , vp8.0, vorbis@128k 18 mp4 640x360 medium , avc1.42001E, mp4a.40.2@ 96k 22 mp4 1280x720 hd720 , avc1.64001F, mp4a.40.2@192k (best)
其中上边是一个列表：第一列为format code（视频编码格式）、第二列为extension（视频文件扩展名）、第三列为resolution （分辨率）、第四列为note（描述信息）
绿色背景：这些都是单纯的音频（无视频）；
黄色背景：这些都是单纯的视频（无声音）；
蓝色背景：这些是音频&视频文件。
2）如何下载，借鉴《http://blog.csdn.net/u011475134/article/details/71023612》中的下载脚本：
文件名命名为：run_youtube-dl.bat
@echo off :start set /p dir=请输入保存路径： set dir=%dir:/=\% pushd %dir% if /i not %dir%==%cd% goto :start echo 保存路径：%cd% :download set /p input=请输入视频链接： set input=%input:&=^^^&% youtube-dl -F %input% if errorlevel 1 goto :download set /p code=请输入视频格式编号： youtube-dl -f %code% %input% goto :download
因此如果需要简单的下载，就可以直接选择“蓝色背景”这块的视频下载即可，但是这里的分辨率是有限的。
那么，如何实现自定义选择音频和视频本地组合呢？这个将在下边的例子中体现。
其中，如果需要单纯下载一个音频|视频文件，只需要在“请输入视频格式编号”输入“format code”对应的编号就可以。
但是，如果需要下载一个视频和一个音频文件，之后让它们两个文件合并，这就需要再在“请输入视频格式编号” 输入视频文件的“format code”+音频文件的“format code”，既可。
注意：
正是视频和音频文件合并这种情况下才会使用到“ffmpeg组件”，否则你可以不安装。
实际操作：运行“run_youtube-dl.bat”，之后一步一步的操作即可。
请输入保存路径：E:\湖北 保存路径：E:\湖北 请输入视频链接：https://www.youtube.com/watch?v=ozVRGho-cZQ [youtube] ozVRGho-cZQ: Downloading webpage [youtube] ozVRGho-cZQ: Downloading video info webpage [youtube] ozVRGho-cZQ: Extracting video information [youtube] ozVRGho-cZQ: Downloading MPD manifest [info] Available formats for ozVRGho-cZQ: format code extension resolution note 139 m4a audio only DASH audio 48k , m4a_dash container, mp4a.40.5@ 48k (22050Hz), 1.51MiB 249 webm audio only DASH audio 51k , opus @ 50k, 1.55MiB 250 webm audio only DASH audio 68k , opus @ 70k, 1.98MiB 171 webm audio only DASH audio 109k , vorbis@128k, 2.89MiB 140 m4a audio only DASH audio 128k , m4a_dash container, mp4a.40.2@128k (44100Hz), 4.03MiB 251 webm audio only DASH audio 143k , opus @160k, 4.32MiB 278 webm 256x144 144p 109k , webm container, vp9, 30fps, video only, 2.96MiB 160 mp4 256x144 DASH video 114k , avc1.4d400c, 30fps, videoonly, 3.50MiB 242 webm 426x240 240p 243k , vp9, 30fps, video only, 5.76MiB 133 mp4 426x240 DASH video 270k , avc1.4d4015, 30fps, videoonly, 7.80MiB 243 webm 640x360 360p 437k , vp9, 30fps, video only, 10.67MiB 134 mp4 640x360 DASH video 641k , avc1.4d401e, 30fps, videoonly, 13.68MiB 244 webm 854x480 480p 803k , vp9, 30fps, video only, 19.60MiB 135 mp4 854x480 DASH video 1176k , avc1.4d401f, 30fps, videoonly, 30.49MiB 247 webm 1280x720 720p 1707k , vp9, 30fps, video only, 42.08MiB 136 mp4 1280x720 DASH video 2349k , avc1.4d401f, 30fps, videoonly, 64.04MiB 248 webm 1920x1080 1080p 3149k , vp9, 30fps, video only, 79.04MiB 137 mp4 1920x1080 DASH video 4457k , avc1.640028, 30fps, videoonly, 127.32MiB 17 3gp 176x144 small , mp4v.20.3, mp4a.40.2@ 24k 36 3gp 320x180 small , mp4v.20.3, mp4a.40.2 43 webm 640x360 medium , vp8.0, vorbis@128k 18 mp4 640x360 medium , avc1.42001E, mp4a.40.2@ 96k 22 mp4 1280x720 hd720 , avc1.64001F, mp4a.40.2@192k (best) 请输入视频格式编号：160+140 [youtube] ozVRGho-cZQ: Downloading webpage [youtube] ozVRGho-cZQ: Downloading video info webpage [youtube] ozVRGho-cZQ: Extracting video information [youtube] ozVRGho-cZQ: Downloading MPD manifest [download] Destination: Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.f160.mp4 [download] 82.7% of 3.50MiB at 36.22KiB/s ETA 00:17[download] Got server HTTP error: Downloaded 3031024 bytes, expected 3667147 bytes. Retrying (attempt 1 of 10)... [download] Resuming download at byte 3031024 [download] Destination: Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.f160.mp4 [download] 100% of 3.50MiB in 00:25 [download] Destination: Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.f140.m4a [download] 58.2% of 4.03MiB at 30.94KiB/s ETA 00:55[download] Got server HTTP error: Downloaded 2457584 bytes, expected 4222708 bytes. Retrying (attempt 1 of 10)... [download] Resuming download at byte 2457584 [download] Destination: Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.f140.m4a [download] 100% of 4.03MiB in 00:07 [ffmpeg] Merging formats into "Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.mp4" Deleting original file Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.f160.mp4 (pass -k to keep) Deleting original file Jimmy and Kevin Hart Visit a Haunted House-ozVRGho-cZQ.f140.m4a (pass -k to keep) 请输入视频链接：
本文记录结束。