Configure FFmpeg to Trust Custom SSL CA Certificate

When streaming media over HTTPS, FFmpeg must validate the SSL/TLS certificate of the hosting server. If your stream is hosted behind a private or custom Certificate Authority (CA), FFmpeg will reject the connection with a handshake error unless it is configured to trust that specific CA. This article demonstrates how to configure FFmpeg to recognize custom SSL certificates using both command-line parameters and system environment variables.

Method 1: Use FFmpeg Command-Line Options

The most direct way to trust a custom CA is by passing the certificate file directly into the FFmpeg command. FFmpeg’s TLS protocol handler supports arguments to define verification behavior and point to a specific certificate file.

To stream using a custom CA, use the -ca_file option and enable verification with -tls_verify 1 before your input URL:

ffmpeg -tls_verify 1 -ca_file /path/to/custom-ca.pem -i https://your-secure-stream-url/playlist.m3u8 -c copy output.mp4

Method 2: Configure Environment Variables

FFmpeg typically relies on underlying SSL libraries like OpenSSL or GnuTLS. You can instruct these libraries to load your custom certificate by setting global environment variables before running your FFmpeg command.

On Linux and macOS

Set the SSL_CERT_FILE variable to point to your certificate:

export SSL_CERT_FILE="/path/to/custom-ca.pem"
ffmpeg -i https://your-secure-stream-url/playlist.m3u8 -c copy output.mp4

Alternatively, if you have a directory containing multiple trusted certificates, you can use SSL_CERT_DIR:

export SSL_CERT_DIR="/path/to/certs/directory/"
ffmpeg -i https://your-secure-stream-url/playlist.m3u8 -c copy output.mp4

On Windows (Command Prompt)

set SSL_CERT_FILE="C:\path\to\custom-ca.pem"
ffmpeg -i https://your-secure-stream-url/playlist.m3u8 -c copy output.mp4

On Windows (PowerShell)

$env:SSL_CERT_FILE="C:\path\to\custom-ca.pem"
ffmpeg -i https://your-secure-stream-url/playlist.m3u8 -c copy output.mp4

Method 3: Import the CA into the Operating System Trust Store

If you do not want to specify the certificate path every time you run FFmpeg, you can install the custom CA directly into your operating system’s root store. FFmpeg will automatically trust any certificates validated by the system.