我正在尝试将各种 .ts 视频剪辑连接成一个视频,然后将视频转换为 .mp4 文件.我知道我可以制作一个格式如下的 .txt 文件:
I'm attempting to concatenate various .ts video clips into one video and then convert the video into an .mp4 file. I know I can make a .txt file formatted like so:
file '/path/to/file1'
file '/path/to/file2'
file '/path/to/file3'
然后像这样连接它们:
ffmpeg -f concat -i mylist.txt -c copy all.ts
然后像这样转换文件:
ffmpeg -i all.ts -acodec copy -vcodec copy all.mp4
我的问题是,我的 .txt 文件可以是来自另一个域的网址吗?例如:
My question is, can my .txt file be urls from another domain? e.g.:
http://somewebsite.com/files/videoclip1.ts
http://somewebsite.com/files/videoclip2.ts
http://somewebsite.com/files/videoclip3.ts
或者,我是否必须先下载所有这些剪辑,将它们本地存储在我的域中,然后制作一个指向它们的 .txt 文件?我正在使用 PHP.谢谢.
Or, do I first have to download all these clips, store them locally on my domain, then make a .txt file pointing to them? I'm using PHP. Thanks.
是的,这是可能的.请注意,在以下示例中,我使用了您问题中的 url 和文件名,测试时我在自己的网络服务器上使用了一些测试文件.
Yes, this is possible. Note that in the following examples I use the urls and filenames from your question, when testing I used some test files on my own web server.
使用您提供的示例文本文件尝试此操作将给出非常明确的错误消息:
Trying this with the example text file you provided will give a pretty clear error message:
[concat @ 0x7f892f800000] 第 1 行:未知关键字 'http://somewebsite.com/files/videoclip1.ts
[concat @ 0x7f892f800000] Line 1: unknown keyword 'http://somewebsite.com/files/videoclip1.ts
mylist.txt:处理输入时发现无效数据
mylist.txt: Invalid data found when processing input
通过在 mylist.txt
中重新引入 'file' 关键字很容易解决这个问题:
This is easily fixed by re-introducing the 'file' keyword in mylist.txt
:
file 'http://somewebsite.com/files/videoclip1.ts'
file 'http://somewebsite.com/files/videoclip2.ts'
file 'http://somewebsite.com/files/videoclip3.ts'
更新后的文件会给出不同的错误信息:
That updated file will give a different error message:
[concat @ 0x7fa467800000] 不安全的文件名 'http://somewebsite.com/files/videoclip1.ts'
[concat @ 0x7fa467800000] Unsafe file name 'http://somewebsite.com/files/videoclip1.ts'
mylist.txt:不允许操作
mylist.txt: Operation not permitted
这样做的原因是ffmpeg默认不允许http-urls.这可以通过在 ffmpeg 调用中包含 -safe 0
参数before -i
参数来绕过:
The reason for this is that ffmpeg will not allow http-urls by default. This can be bypassed by including the -safe 0
argument in your ffmpeg call before the -i
argument:
ffmpeg -f concat -safe 0 -i mylist.txt -c copy all.ts
这可能在您的安装中开箱即用,在我的安装中,这给出了另一条错误消息:
This might work out of the box on your installation, on mine this gave another error message:
[http @ 0x7faa68507940] 协议 'http' 不在白名单 'file,crypto' 中!
[http @ 0x7faa68507940] Protocol 'http' not on whitelist 'file,crypto'!
[concat @ 0x7faa69001200] 无法打开 'http://somewebsite.com/files/videoclip1.ts'
[concat @ 0x7faa69001200] Impossible to open 'http://somewebsite.com/files/videoclip1.ts'
mylist.txt:无效参数
mylist.txt: Invalid argument
这是因为,在我的安装中,ffmpeg 的默认协议白名单仅包括 file
和 crypto
.为了也允许 http
协议,我们需要在命令中明确提供允许的协议白名单.事实证明,tcp
也是必需的:
This is because, on my installation, ffmpeg's default protocol whitelist only includes file
and crypto
. To allow the http
protocol as well, we need to explicitly provide the allowed protocols whitelist in the command. As it turns out, tcp
is also required:
ffmpeg -f concat -safe 0 -protocol_whitelist file,http,tcp -i mylist.txt -c copy all.ts
这允许我的安装下载和连接视频文件.
This allowed my installation to download and concatenate the video files.
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