加入图像和音频以产生视频 [英] Join images and audio to result video

问题描述

我有很多不同大小的图像（即1024x768和900x942）和30秒的音频文件（audio.mp3），我需要从中创建一个视频。

我现在尝试：result％d.png（1到4）和audio.mp3

  ffmpeg -y -i result％d.png -i audio.mp3 -r 30 -b 2500k -vframes 900 
 -acodec libvo_aacenc -ab 160k video.mp4 
  / pre> 
 
 
视频 video.mp4 有30秒，但最后一张图像保持到3音频。
 
 
 
每个图像需要在相同的时间显示，直到音频结束。任何人都知道如何做？
 
 
 
图像数量有时会有所变化。
解决方案
 FFMPEG版本：3.2.1-1 
 
 
 
 UBUNTU 16.04.1 
 
 
 
您有一个名为wow.mp3的mp3音频文件在这种情况下，以下命令将获得mp3的持续时间（以秒为单位）。
  ffprobe -v error -show_entries format = duration -of default = noprint_wrappers = 1：nokey = 1 wow.mp3 
  
 
 
一旦你持续了几秒钟（想象我有11.36秒）。现在我有3张图像，我想要运行每个图像（11.36 / 3 = 3.79），然后请使用以下内容：
  ffmpeg -y -framerate 1 / 3.79 -start_number 1 -i ./swissGenevaLake_%d.jpg -i ./akib.mp3 -c：v libx264 -r 25 -pix_fmt yuv420p -c：aac -strict experiment-shortest output.mp4 
  
这里的图片是./swissGenevaLake_1.jpg，./swissGenevaLake_2.jpg和。 /swissGenevaLake_3.jpg。
 
 
 
 -framerate 1 / 3.784表示每张图片运行3.784秒。
 
 
 
  - start_number 1表示从图像编号1开始，意思是./swissGenevaLake_1.jpg 
 
 
 
 -c：v libx264：视频编解码器H.264 
 
 
 
 -r 25：输出视频帧率25 
 
 
 
 -pix_fmt yuv420p：输出视频像素格式。
 
 
 
 -c：aac：使用aac编码音频
 
 
 
 -shortest：音频完成后立即结束视频。
 
 
 
 output.mp4：输出文件名
 
 
 
免责声明：我没有t测试合并多个大小的图像。
 
 
 
参考文献：
 
 
 
  https://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images  
 
 
 
  https：// trac.ffmpeg.org/wiki/Encode/AAC  
 
 
 
  http://trac.ffmpeg.org/wiki/FFprobeTips  
 
I have a lot of images with different sizes (i.e. 1024x768 and 900x942) and an audio file (audio.mp3) of 30 seconds and I need to create a video from them.

I'm trying it now with: result%d.png (1 to 4) and audio.mp3
ffmpeg -y -i result%d.png -i audio.mp3 -r 30 -b 2500k -vframes 900
-acodec libvo_aacenc -ab 160k video.mp4
The video video.mp4 has 30 seconds but the 3 first images is showed very quickly when the last image remains until the end of the audio.

Each image needs to be showed in a equal time until the end of the audio. Anyone knows how to do it?

The number of the images will vary sometimes.
解决方案
FFMPEG version: 3.2.1-1

UBUNTU 16.04.1

Imagine, you have an mp3 audio file named wow.mp3 In that case, the following command will get the duration of the mp3 in seconds.
ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 wow.mp3
Once you have the duration in seconds (imagine I got 11.36 seconds). Now since I have 3 images, I want to run each image for (11.36/3 = 3.79), then  please use the following:
ffmpeg -y -framerate 1/3.79 -start_number 1 -i ./swissGenevaLake_%d.jpg -i ./akib.mp3 -c:v libx264 -r 25 -pix_fmt yuv420p -c:a aac -strict experimental -shortest output.mp4
Here the images are ./swissGenevaLake_1.jpg, ./swissGenevaLake_2.jpg , and ./swissGenevaLake_3.jpg.

-framerate 1/3.784 means, each image runs for 3.784 seconds.

-start_number 1 means, starts with image number one, meaning ./swissGenevaLake_1.jpg

-c:v libx264: video codec H.264

-r 25: output video framerate 25

-pix_fmt yuv420p: output video pixel format.

-c:a aac: encode the audio using aac

-shortest: end the video as soon as the audio is done.

output.mp4: output file name

Disclaimer: I have not tested merging images of multiple sizes.

References: 

https://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images

https://trac.ffmpeg.org/wiki/Encode/AAC

http://trac.ffmpeg.org/wiki/FFprobeTips

                        
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