Javascript 获取youtube动画缩略图_Javascript_Youtube_Youtube Api_Animated Gif

Javascript 获取youtube动画缩略图

javascript youtube youtube-api

Javascript 获取youtube动画缩略图,javascript,youtube,youtube-api,animated-gif,Javascript,Youtube,Youtube Api,Animated Gif,有没有办法将youtube上的动画缩略图嵌入我的网站？我说的不是静态缩略图，而是一个看起来像3秒左右的动画.gif的缩略图。我不知道它是否对您有帮助但当你进入youtube的搜索页面时您可以访问该对象 window.ytInitialData 这里我们有一个节点称为： window.ytInitialData.contents.twoColumnSearchResultsRenderer.primaryContents.sectionListRenderer.contents[“0”]。it

有没有办法将youtube上的动画缩略图嵌入我的网站？我说的不是静态缩略图，而是一个看起来像3秒左右的动画.gif的缩略图。

我不知道它是否对您有帮助

但当你进入youtube的搜索页面时您可以访问该对象

window.ytInitialData

这里我们有一个节点称为：

window.ytInitialData.contents.twoColumnSearchResultsRenderer.primaryContents.sectionListRenderer.contents[“0”]。itemSectionRenderer.contents[2]。videoRenderer.richThumbnail.movingThumbnailRenderer.movingThumbnailDetails.thumbnails[“0”]。url

也许你能找到一种方法来检索这些数据

按以下方式访问搜索页面：我在console中尝试的内容：

let videos=window.ytInitialData.contents.twoColumnSearchResultsRenderer.primaryContents.sectionListRenderer.contents[“0”]。itemSectionRenderer.contents；
如果（！videos.length）{//包括其他渲染器，例如：“你是说…”
log（“搜索中没有视频”）；
//返回；
}
让video=videos.filter（v=>v.videoRenderer&&v.videoRenderer.videoId==“uspwv1zwv4”）
如果（！video.length）{
log（'搜索中该ID没有视频'）；
//返回；
}
设thumbs=video[0]。videoRenderer.richThumbnail.movingThumbnailRenderer.movingThumbnailDetails.thumbnails；
如果（！thumbs.length）{
log（“该视频没有移动的拇指”）；
//返回；
}
console.log（拇指[0].url）；

截至2019年6月：

1。获取静态缩略图非常简单

它们通过YouTube API公开，更好的是，它们遵循一个非常简单和统一的URL结构（更多细节）

2。Youtube的动画缩略图在数量有限的浏览器中受支持。

显然，桌面浏览器Chrome和Opera（）
顺便说一句，缩略图是图像格式的，具有更宽的宽度

3。为有限数量的视频制作动画拇指辫相对容易。

例如，您可以在浏览器开发工具中检查网络活动（有关详细信息，请参阅）

打开网络面板，访问包含所需视频的页面列表，清除网络活动（也可以选择“Img”仅显示与图像相关的活动），然后将所需视频悬停。然后右键单击所需的资源并复制url

如果图像有帮助

动画缩略图的URL如下所示：

https://i.ytimg.com/an_webp/zdOmNiXvM3w/mqdefault_6s.webp?du=3000&sqp=CPDloOgF&rs=AOn4CLD9rYflZAMK6qBIbYJDoQZLk9UARw

4。据我所知，目前无法通过编程方式获取动画缩略图（无网络垃圾）

换句话说，给定视频ID，当前无法通过API或定义的URL模式获取动画缩略图URL

附：希望有人能证明我在第4点上是错的，这里有几个URL的例子：

https://i.ytimg.com/an_webp/zdOmNiXvM3w/mqdefault_6s.webp?du=3000&sqp=CPDloOgF&rs=AOn4CLD9rYflZAMK6qBIbYJDoQZLk9UARw

https://i.ytimg.com/an_webp/oIIDZq4nZpo/mqdefault_6s.webp?du=3000&sqp=CLyqoegF&rs=AOn4CLD9DyqMoxBTiOPTUX8FQJmUfiu8NA

https://i.ytimg.com/an_webp/X9tU8ybzcFs/mqdefault_6s.webp?du=3000&sqp=CLHroOgF&rs=AOn4CLAX8j6uWUko_54aPJLwkbAe_cUR3w

更改视频ID或其他参数不会返回有效的缩略图。

Gifs.com提供了一个免费API，用于从媒体相关URL生成带水印的GIF

它没有明确提到它，但事实上它接受Youtube URL并从中生成预览

下面是一个如何将其与cURL一起使用的示例

curl -XPOST -H "Content-type: application/json" -d '{ "source": "https://www.youtube.com/watch?v=74KxwkLjE9E" }' 'https://api.gifs.com/media/import'

生成大约需要一两分钟，因此，如果您使用服务器存储/缓存GIF，您可以创建自己的个人预览生成器

这是文档的存档链接

我键入了一个FFmpeg脚本。要获得许多未压缩YouTube移动缩略图的变体，您需要

下载FFmpeg并将FFmpeg.exe解压缩到文件夹中

将所需视频从YouTube下载到同一文件夹中，并将其重命名为“视频”（如果视频的纵横比为16:9）或“sar”（如果视频具有其他/特殊纵横比）

在文件夹中运行cmd

手动编辑我的脚本：

在img.youtube.com/vi/（视频ID）/1.jpg上显示的帧的时间（在下载的视频中，hh:mm:ss.（1/10秒的一部分））与“CuttedFor1.mp4”对齐的“00:00:00.0”
“00:00:00.0”与“CuttedFor2.mp4”对齐=img.youtube.com/vi/（视频ID）/2.jpg上显示的帧时间
“00:00:00.0”与“CuttedFor3.mp4”对齐=img.youtube.com/vi/（视频ID）/3.jpg上显示的帧时间
其他“00:00:00.0”=原始mqdefault_6s.webp中第一帧的时间（从网络选项卡）

运行我的脚本

计算每个结果webp的持续时间（例如，使用秒表，手动查看webp 100次，然后将其除以100）（可能会出现自动方法）

手动编辑我的脚本，使setpts等于“1/（此处您需要粘贴在脚本第一次运行后获得的适当webp的持续时间）/3）*PTS[v]”，而atempo等于“（此处您需要粘贴在脚本第一次运行后获得的适当webp的持续时间）/3[a]”

删除第一次运行脚本后获得的所有文件

再次运行我的脚本

易读：

ffmpeg -i sar.mp4 -vf "crop=in_w:in_w/16*9" -c:a copy video.mp4
rem // If to obtain a 16: 9 aspect ratio, you need to crop the thumbnail from above and below.
ffmpeg -i sar.mp4 -vf "crop=in_h/9*16:in_h" -c:a copy video.mp4
rem // If to obtain a 16: 9 aspect ratio, you need to crop the thumbnail on the sides.
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4
ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4
ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4
ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp
copy hqdefault_6s.webp 0_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4
ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4
ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4
ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4
ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4
ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4
ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4
ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4
ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -i sar.mp4 -vf "crop=in_w:in_w/16*9" -c:a copy video.mp4 && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -i sar.mp4 -vf "crop=in_h/9*16:in_h" -c:a copy video.mp4 && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

准备执行：

SAR压缩（从上方和下方裁剪缩略图）：

ffmpeg -i sar.mp4 -vf "crop=in_w:in_w/16*9" -c:a copy video.mp4
rem // If to obtain a 16: 9 aspect ratio, you need to crop the thumbnail from above and below.
ffmpeg -i sar.mp4 -vf "crop=in_h/9*16:in_h" -c:a copy video.mp4
rem // If to obtain a 16: 9 aspect ratio, you need to crop the thumbnail on the sides.
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4
ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4
ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4
ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp
copy hqdefault_6s.webp 0_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4
ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4
ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4
ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4
ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4
ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4
ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4
ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4
ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -i sar.mp4 -vf "crop=in_w:in_w/16*9" -c:a copy video.mp4 && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -i sar.mp4 -vf "crop=in_h/9*16:in_h" -c:a copy video.mp4 && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

为SAR压缩（裁剪侧面的缩略图）：

ffmpeg -i sar.mp4 -vf "crop=in_w:in_w/16*9" -c:a copy video.mp4
rem // If to obtain a 16: 9 aspect ratio, you need to crop the thumbnail from above and below.
ffmpeg -i sar.mp4 -vf "crop=in_h/9*16:in_h" -c:a copy video.mp4
rem // If to obtain a 16: 9 aspect ratio, you need to crop the thumbnail on the sides.
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4
ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4
ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4
ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp
copy hqdefault_6s.webp 0_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4
ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp
ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4
ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4
ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4
ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4
ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4
ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp
ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4
ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4
ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -i sar.mp4 -vf "crop=in_w:in_w/16*9" -c:a copy video.mp4 && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -i sar.mp4 -vf "crop=in_h/9*16:in_h" -c:a copy video.mp4 && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor0.mp4 && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormaxresdefault.mp4 && ffmpeg -i SpeedChangedFormaxresdefault.mp4 -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 maxresdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForsddefault.mp4 && ffmpeg -i SpeedChangedForsddefault.mp4 -vf "scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 sddefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedForhqdefault.mp4 && ffmpeg -i SpeedChangedForhqdefault.mp4 -vf "scale=480:360:force_original_aspect_ratio=decrease,pad=480:360:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 hqdefault_6s.webp && copy hqdefault_6s.webp 0_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFormqdefault.mp4 && ffmpeg -i SpeedChangedFormqdefault.mp4 -vf "scale=320:180:force_original_aspect_ratio=decrease,pad=320:180:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 mqdefault_6s.webp && ffmpeg -i CuttedFor0.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFordefault.mp4 && ffmpeg -i SpeedChangedFordefault.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 default_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor1.mp4 && ffmpeg -i CuttedFor1.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor1.mp4 && ffmpeg -i SpeedChangedFor1.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 1_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor2.mp4 && ffmpeg -i CuttedFor2.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor2.mp4 && ffmpeg -i SpeedChangedFor2.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 2_6s.webp && ffmpeg -ss 00:00:00.0 -i video.mp4 -c copy -t 6 CuttedFor3.mp4 && ffmpeg -i CuttedFor3.mp4 -filter_complex "[0:v]setpts=1*PTS[v];[0:a]atempo=1[a]" -map "[v]" -map "[a]" SpeedChangedFor3.mp4 && ffmpeg -i SpeedChangedFor3.mp4 -vf "scale=120:90:force_original_aspect_ratio=decrease,pad=120:90:(ow-iw)/2:(oh-ih)/2" -vcodec libwebp -lossless 1 -loop 0 -an -vsync 0 3_6s.webp

压缩为16:9（“视频”）