ffmpeg_downloader

func Download ¶

func Download(configName string) (string, error)

Download downloads and installs FFmpeg to the specified configuration directory.

Parameters: ¶

• configName: The name of the configuration subdirectory where FFmpeg will be installed. This directory is created under the user's config directory (e.g., ~/.config/configName on Linux).

Returns: ¶

• string: The full path to the downloaded FFmpeg binary if successful.
• error: An error if any step of the download or installation process fails, including network errors, file system errors, or extraction failures.

Example: ¶

path, err := Download("my-app")
if err != nil {
    log.Fatalf("Failed to download FFmpeg: %v", err)
}

// Use the downloaded FFmpeg binary
cmd := exec.Command(path, "-i", "input.mp4", "output.mp4")

func GetFFmpegPath ¶

func GetFFmpegPath(configName string) string

GetFFmpegPath retrieves the path to the FFmpeg binary, ensuring it's available for use.

This function implements a fallback strategy to locate or obtain FFmpeg:

1. First checks if FFmpeg is installed system-wide
2. If not found system-wide, checks for a statically installed version in the config directory
3. If neither is found, downloads and installs FFmpeg to the config directory

When FFmpeg is found system-wide, it returns an empty string since the binary is accessible via the system PATH. For statically installed or downloaded versions, it returns the full path to the binary.

Parameters: ¶

• configName: The name of the configuration directory where FFmpeg will be stored if downloaded or where it should be looked for if statically installed.

Returns: ¶

• string: The full path to the FFmpeg binary if statically installed or downloaded, or an empty string if FFmpeg is available system-wide. Returns empty string if download fails.

Example: ¶

path := GetFFmpegPath("my-app")
if path == "" {
    // FFmpeg is available system-wide, use "ffmpeg" command directly
    cmd := exec.Command("ffmpeg", "-version")
} else {
    // Use the specific path returned
    cmd := exec.Command(path, "-version")
}

func IsStaticallyInstalled ¶

func IsStaticallyInstalled(configName string) (string, bool)

IsStaticallyInstalled checks if FFmpeg is installed in the specified configuration directory.

Parameters: ¶

• configName: The name of the configuration subdirectory where FFmpeg should be located. This directory is created under the user's config directory (e.g., ~/.config/configName on Linux).

Returns: ¶

• string: The full path to the FFmpeg binary if found and executable, empty string otherwise.
• bool: true if FFmpeg is found and executable in the specified location, false otherwise.

Example: ¶

path, installed := IsStaticallyInstalled("my-app")
if installed {
    // Use the statically installed FFmpeg
    cmd := exec.Command(path, "-i", "input.mp4", "output.mp4")
} else {
    // FFmpeg not found in static location
    fmt.Println("FFmpeg not statically installed")
}

func IsSystemInstalled ¶

func IsSystemInstalled() bool

IsSystemInstalled checks if FFmpeg is installed and accessible system-wide.

Returns: ¶

• bool: true if FFmpeg is found and can be executed system-wide, otherwise false.

Example: ¶

if IsSystemInstalled() {
    // FFmpeg is available system-wide
    cmd := exec.Command("ffmpeg", "-i", "input.mp4", "output.mp4")
} else {
    // Need to download or use statically installed version
    path := GetFFmpegPath("my-app")
}