ffmpeg将播放图像添加到缩略图输出 [英] ffmpeg adding play image to thumbnail output

问题描述

嗯，我现在可以通过执行以下命令行从MP4视频中获取缩略图：

  [设置每个文件主选项time_off开始时间偏移] 
 || [开始时间偏移量] 
 || || [设置输入视频文件选项] 
 || || || [这里的视频文件名] 
 || || || || [将视频选项设置为要录制的视频帧数] 
 || || || || || [请求第一帧] 
 || || || || || || [拍摄的视频帧的名称] 
 || || || || || || || 
 \ / \ / \ / \ / \ / \ / \ / 
 ffmpeg -ss 0 -i vidfile.mp4 -vframes 1 frame.png 
  

现在正如我上面所说，这个命令在制作我的MP3视频的第一帧的缩略图时很正常。但是，我需要在新创建的帧图像的顶部放置一个播放按钮的叠加图像。

是否有另一个命令，我可以告诉它覆盖frame.png顶部的另一个图像？

我想覆盖在框架顶部的图像看起来像这样（透明的PNG）：

任何帮助都会很棒！谢谢！

解决方案

这个命令应该为你做这个工作：

  ffmpeg -ss 30 -i movie.mp4 -i play.png -filter_complex \ 
[0：v] [1：v] overlay = main_w / 2-overlay_w / 2：main_h / 2-overlay_h / 2\ 
 -vframes 1 output.png 
  

<有关详细信息，请参阅重叠式视频过滤器文档。

Hey all I am currently able to get a thumbnail capture from my MP4 video by doing the following command line:

       [Sets Per-file main options time_off start time offset]
       || [The # of start time offsets]
       || || [Sets input video file option]
       || || ||   [Video file name here]
       || || ||   ||         [Sets video option to # of video frames to record]        
       || || ||   ||         ||     [Asking for the first frame]
       || || ||   ||         ||     ||  [Name of the captured video frame]
       || || ||   ||         ||     ||  ||
       \/ \/ \/   \/         \/     \/  \/
ffmpeg -ss 0 -i vidfile.mp4 -vframes 1 frame.png

Now as I said above, this command works just fine in producing a thumbnail of the first frame of my MP3 video. However, I am needing to place an overlay image of a "play" button on top of that newly created frame image.

Is there another command that i can tell it to overlay another image on top of frame.png?

The image I would like to overlay on top of the frame looks like this (a transparent PNG):

Any help would be great! Thanks!

解决方案

This command should do the job for you:

ffmpeg -ss 30 -i movie.mp4 -i play.png -filter_complex \
"[0:v][1:v]overlay=main_w/2-overlay_w/2:main_h/2-overlay_h/2" \
-vframes 1 output.png

Refer the overlay video filter documentation for more details.

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