FFMPEG mkv到mp4转换在HTML5播放器中缺少音频 [英] FFMPEG mkv to mp4 conversion lacks audio in HTML5 player
问题描述
我使用ffmpeg通过以下命令行将mkv文件转换为mp4:
I used ffmpeg to convert an mkv file to mp4 using this command line:
ffmpeg -i input.mkv -c copy file-1.mp4
生成的mp4在Linux Mint's Xplayer上可以正常播放(视频和音频).但是上传文件1后，它没有声音播放.因此，我上传了另一个mp4文件2，该文件不必转换，它可以同时播放视频和音频.所以file-1发生的一切似乎与我对ffmpeg的使用有关.
The resulting mp4 plays fine (video and audio) on Linux Mint's Xplayer. But after uploading file-1, it played with no audio. So I uploaded another mp4 file-2, one I didn't have to convert, and it plays both video and audio without a problem. So whatever's going on with file-1 seems to be with my use of ffmpeg.
我正在使用的播放器称为afterglow.但是HTML5 player用相同的方式处理这两个文件:file-1&文件2
The player I'm using is called afterglow. But the HTML5 player handles these two files the same way: file-1 & file-2
有人知道为什么在线播放ffmpeg转换后的文件时无声音吗?是否有其他转换命令可确保转换后的mkv files可以在线播放器播放声音?
Does anyone know why the ffmpeg converted file is soundless when played online? Is there a different conversion command that ensures converted mkv files will play with sound by online players?
推荐答案
我看到了几个问题:
-
输入具有DTS音频.尽管MP4支持该功能，但我猜它不适用于HTML5.您必须转换为AAC.在
-c copy之后添加-c:a aac.
您的ffmpeg很旧. FFmpeg AAC编码器进行了改进，缺少您的版本.通过下载最新版本来避免任何其他潜在问题.
Your ffmpeg is old. The FFmpeg AAC encoder had improvements that your version is missing. Avoid any other potential issues by downloading a recent version.
添加-movflags +faststart.编码后，这将在文件中移动一些信息，因此可以更快地开始播放.否则必须先下载整个视频，然后才能播放.
Add -movflags +faststart. This will move some info in the file after encoding so it can begin playback quicker; otherwise it will have to download the whole video before playing.
示例命令:
ffmpeg -i input.mkv -c copy -c:a aac -movflags +faststart output.mp4
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