How We Added Silence Removal to SendRec

Anyone who has watched a screen recording knows the feeling: the presenter pauses to think, navigates a menu slowly, or just trails off between thoughts. Those dead seconds add up fast. In v1.65.4, SendRec can detect and remove them automatically. We already had filler word removal — detecting "um", "uh", and similar disfluencies from transcript data, presenting them as a checklist, and cutting them out. Silence removal follows the same pattern, but operates purely on audio energy rather than transcription. Detection: ffmpeg's silencedetect filter ffmpeg ships a silencedetect audio filter that scans an audio stream and emits timestamps whenever audio drops below a configurable noise floor for at least a minimum duration. The command: ffmpeg -i input.mp4 -vn -af silencedetect = noise = -30dB :d = 1.0 -f null - The -vn flag tells ffmpeg to skip video decoding entirely. Silence detection only needs the audio stream, and skipping video makes the scan significantly faster on large files. ff