98 lines
3.4 KiB
Plaintext
98 lines
3.4 KiB
Plaintext
 
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CDA.PL VIDEO DOWNLOADER
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=======================
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Downloads DRM-protected videos from cda.pl. Requires a CDA account (free or premium,
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depending on the content). Uses Widevine L3 decryption — no browser or emulator needed.
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REQUIREMENTS
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------------
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Python packages: pip install requests beautifulsoup4 pywidevine
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System tool: ffmpeg (must be in PATH, used for muxing)
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Included tools: tools/N_m3u8DL-RE (DASH downloader)
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tools/mp4decrypt (segment decryptor)
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Device file: L3/*.wvd (Widevine L3 key — already extracted)
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BASIC USAGE
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-----------
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python3 cda_download.py <url>
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The first time you run it, you will be prompted for your CDA login (email) and
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password. These are saved to .cda_creds in this directory (chmod 600, readable
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only by you) so you won't be asked again on subsequent runs.
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Example:
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python3 cda_download.py https://www.cda.pl/video/56706683e/vfilm
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FINDING THE VIDEO URL
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---------------------
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Open the video page on cda.pl in your browser. Copy the URL from the address bar.
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It looks like:
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https://www.cda.pl/video/56706683e/vfilm
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The video ID is the alphanumeric segment after /video/ (here: 56706683e).
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OPTIONS
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-------
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-u, --username EMAIL CDA login email (skips the prompt)
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-p, --password PASS CDA password (skips the prompt)
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-o, --output NAME Output filename without extension (default: video title)
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Credentials can also be provided via environment variables to avoid passing them
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on the command line:
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export CDA_USER=your@email.com
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read -rs CDA_PASS && export CDA_PASS
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python3 cda_download.py <url>
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Priority order: command-line flags > environment variables > saved .cda_creds file > interactive prompt.
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OUTPUT
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------
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Files are saved to the downloads/ subdirectory as .mkv:
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downloads/Goscie_S01E01_Lektor_PL.mkv
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The filename is taken from the video page title and sanitised (spaces and special
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characters replaced with underscores). Use -o to override.
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HOW IT WORKS
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------------
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1. Logs in to cda.pl to obtain a session cookie.
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2. Fetches the video page and extracts the DASH manifest URL and Widevine
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license URL from the embedded player_data JSON.
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3. Downloads the DASH manifest (MPD) and extracts the Widevine PSSH box.
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4. Sends a license challenge to DRMtoday (cda.pl's DRM provider) using the
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Widevine L3 device file — receives the content decryption key.
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5. Passes the key to N_m3u8DL-RE, which downloads the encrypted DASH segments,
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decrypts them with mp4decrypt, and muxes the result into an MKV file.
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TROUBLESHOOTING
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---------------
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"Wrong CDA username or password."
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Check your credentials. If your password contains special characters, use
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the interactive prompt rather than passing -p on the command line.
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"Login blocked by CAPTCHA"
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CDA sometimes requires a CAPTCHA after repeated failed logins. Wait a few
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minutes and try again, or log in manually via the browser first.
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"No DASH manifest in player_data"
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The video may be unavailable in your region, not yet released, or requires
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a higher account tier than you have.
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"License server returned no content keys."
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The DRMtoday license request failed. Your session token may have expired —
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delete .cda_creds and re-enter your credentials.
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To update saved credentials (e.g. after a password change):
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rm .cda_creds
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python3 cda_download.py <url> # will prompt again and save fresh credentials
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