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This article mainly explains "Python merges ts files into mp4 format and how to decrypt them". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "Python merge ts files into mp4 format and decryption method" it!

What is the format of m3u8? M3u8 is a video playback standard launched by Apple, which is a kind of M3U, but the encoding format is UTF-8.

The use of m3u8 format files is mainly because it can achieve multi-rate video adaptation, video websites can automatically match an appropriate rate file for the client to play according to the network bandwidth of users, so as to ensure the fluency of the video.

M3u8 is precisely an index file, which is actually used to parse the corresponding video network address on the server by using the m3u8 file, so as to realize online playback.

It cuts the video into small pieces of video files in ts format, and then stores them in the server (now it is generally stored in the server's memory in order to reduce the number of access times), parses the path through m3u8, and then requests it.

There are actually many ways to merge ts files, and some tutorials use cmd's copy command to merge ts files directly:

Copy / b movie*.ts movie_new.ts

Although this method can be merged, it cannot be converted to mp4 format, and video defects may occur. Therefore, this article will explain how to use ffmpeg to merge ts files into mp4 format, and the use of ffmpeg can also effectively prevent video defects.

1. Prepare for

Before you begin, make sure that Python and pip have been successfully installed on your computer

If you use Python for data analysis, you can install Anaconda directly

Install ffmpeg

Mac (open terminal (Terminal), install with homebrew):

Brew install ffmpeg-with-libvorbis-with-sdl2-with-theora

Linux:

Apt-get install ffmpeg libavcodec-extra

Windows:

1. Enter http://ffmpeg.org/download.html#build-windows, click the icon corresponding to windows, enter the download interface, and click the download download button.

two。 Extract the downloaded zip file to the specified directory

3. Add the bin directory (including ffmpeg.exe) in the extracted file directory to the path environment variable

4. Enter ffmpeg-version on the DOS command line, and the following interface appears indicating that the installation is complete:

two。 Simply merge ts files

Using ffmpeg to merge some ts files is very simple, you only need to type a line of command on the terminal:

Ffmpeg-f concat-I file_list.txt-c copy output.mp4

Where file_list.txt is a text file in the following format:

File "input1.ts"

File "input2.ts"

File "input3.ts"

We can use the Python script to generate this file_list.txt:

Import osfilePath = "your ts video storage path" file_list = sorted (os.listdir (filePath)) with open ("your ts video storage path / file_list.txt", "w +") as f: for file in file_list: f.write ("file" {} "" .format (file))

Note that this file_list.txt needs to be stored in the same directory as your ts video, and then cd enters this directory and executes the ffmpeg merge conversion command mentioned above:

Ffmpeg-f concat-I file_list.txt-c copy output.mp4

3. Decryption processing

What we are talking about above is the ts files that are not encrypted. These files can be downloaded and played directly, but the files encrypted by AES-128 cannot be played after download, so they still need to be decrypted.

How can I tell if encryption is needed? Observe whether the video website has a m3u8 file transfer, download it and open it:

# EXTM3U#EXT-X-VERSION:3#EXT-X-TARGETDURATION:13#EXT-X-MEDIA-SEQUENCE:0 / / here are comments, which will not be found in real files. / / check to see if there is this line in your m3u8 file. If so, this m3u8 file is encrypted, please read on / / if there is no such line, especially without this # EXT-X-KEY, congratulations, this m3u8 is not encrypted. You can merge directly according to the second point of this tutorial # EXT-X-KEY:METHOD=AES-128,URI= "http://www.example.com/20180125/key.key" # EXTINF:12.5,//. This is actually the real address of the video. If you put it on the browser's address bar, you can directly download / / but there will be a lot of such links in the m3u8 file. It is recommended to use tools to download (Xunlei), ffmpeg, vlc, etc. / / GBDYO3576000.ts may also occur here. In fact, the previous path is omitted and http://www.example.com/20180125/GBDYO3576000.ts#EXTINF:12.5,http://www.example.com/20180125/GBDYO3576001.ts#EXTINF:12.5,http://www.example.com/20180125/GBDYO3576002.ts can be added according to the path of the m3u8 file.

If your file is encrypted, you also need a key file. The download method of the Key file is similar to the m3u8 file. The key.key file shown below is the key file we need to download. Note that there are two m3u8 files here, and you need to use the m3u8 file with hyperlinks to the ts file as above:

Download all the ts files, put all the downloaded ts files, m3u8, key.key in a folder, rename the m3u8 file to index.m3u8, and rename key.key to key.m3u8. Change the URL in index.m3u8 to the key file of your local path, and change all ts to your local path, as shown below:

# EXTM3U#EXT-X-VERSION:3#EXT-X-TARGETDURATION:13#EXT-X-MEDIA-SEQUENCE:0#EXT-X-KEY:METHOD=AES-128,URI= "e:/20180125/key.m3u8" # EXTINF:12.5,e:/20180125/GBDYO3576000.ts#EXTINF:12.5,e:/20180125/GBDYO3576001.ts#EXTINF:12.5,e:/20180125/GBDYO3576002.ts

Then merge with ffmpeg:

Ffmpeg-allowed_extensions ALL-I index.m3u8-c copy new.mp4

At this point, I believe you have a deeper understanding of "Python merging ts files into mp4 format and the method of decryption". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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