Function set_ffmpeg_log_level 

pub fn set_ffmpeg_log_level(level: FfmpegLogLevel)

Sets the highest FFmpeg log level forwarded to the log facade (under the FFMPEG_LOG_TARGET target).

Messages above this level are dropped before any formatting work. Defaults to FfmpegLogLevel::Info; raise to FfmpegLogLevel::Trace to receive FFmpeg’s debug/trace diagnostics (they map to log::trace!), or lower to FfmpegLogLevel::Error to keep only errors.