問題描述
我正在嘗試將各種 .ts 視頻剪輯連接成一個視頻，然后將視頻轉換為 .mp4 文件.我知道我可以制作一個格式如下的 .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'
然后像這樣連接它們:
ffmpeg -f concat -i mylist.txt -c copy all.ts
然后像這樣轉換文件:
ffmpeg -i all.ts -acodec copy -vcodec copy all.mp4
我的問題是，我的 .txt 文件可以是來自另一個域的網址嗎?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，我是否必須先下載所有這些剪輯，將它們本地存儲在我的域中，然后制作一個指向它們的 .txt 文件?我正在使用 PHP.謝謝.
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.
推薦答案
是的，這是可能的.請注意，在以下示例中，我使用了您問題中的 url 和文件名，測試時我在自己的網絡服務器上使用了一些測試文件.
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嘗試此操作將給出非常明確的錯誤消息:
Trying this with the example text file you provided will give a pretty clear error message:
[concat @ 0x7f892f800000] 第 1 行:未知關鍵字 'http://somewebsite.com/files/videoclip1.ts
[concat @ 0x7f892f800000] Line 1: unknown keyword 'http://somewebsite.com/files/videoclip1.ts
mylist.txt:處理輸入時發現無效數據
mylist.txt: Invalid data found when processing input
通過在 mylist.txt 中重新引入 'file' 關鍵字很容易解決這個問題:
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'
更新后的文件會給出不同的錯誤信息:
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:不允許操作
mylist.txt: Operation not permitted
這樣做的原因是ffmpeg默認不允許http-urls.這可以通過在 ffmpeg 調用中包含 -safe 0 參數before -i 參數來繞過:
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
這可能在您的安裝中開箱即用，在我的安裝中，這給出了另一條錯誤消息:
This might work out of the box on your installation, on mine this gave another error message:
[http @ 0x7faa68507940] 協議 'http' 不在白名單 'file,crypto' 中！
[http @ 0x7faa68507940] Protocol 'http' not on whitelist 'file,crypto'!
[concat @ 0x7faa69001200] 無法打開 'http://somewebsite.com/files/videoclip1.ts'
[concat @ 0x7faa69001200] Impossible to open 'http://somewebsite.com/files/videoclip1.ts'
mylist.txt:無效參數
mylist.txt: Invalid argument
這是因為，在我的安裝中，ffmpeg 的默認協議白名單僅包括 file 和 crypto.為了也允許 http 協議，我們需要在命令中明確提供允許的協議白名單.事實證明，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
這允許我的安裝下載和連接視頻文件.
This allowed my installation to download and concatenate the video files.
這篇關于FFmpeg 可以連接來自不同域的文件嗎?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！