What Is Video Dubbing?
Video dubbing replaces or adds an audio track to an existing video file. SoundWorks takes your video and your new audio file, combines them, and outputs a new video with the replaced soundtrack. The video stream is preserved without re-encoding, so the process is fast and lossless for the visual content.
Why Use Video Dubbing?
Replace narration. Swap the voice track in a video with an updated recording, a different language version, or an AI-generated voiceover.
Add voiceovers. Add narration to silent video footage, screen recordings, or presentation captures.
Fix audio issues. Replace a video’s audio when the original recording has problems — background noise, wrong language, or poor microphone quality.
Localize content. Create multiple language versions of the same video by dubbing different audio tracks onto the same visual footage.
How It Works
Step 1: Select the video. Load any supported video file (MP4, AVI, MKV, MOV, WebM, and more).
Step 2: Select the new audio. Choose the replacement audio file. SoundWorks supports all common audio formats.
Step 3: Configure codecs. Choose whether to copy the video stream as-is (fastest, no quality loss) or re-encode. Select the audio codec for the output file (AAC, copy, or others).
Step 4: Process. SoundWorks combines the video and audio streams and saves the result. When using stream copy mode, processing takes seconds even for long videos.
Codec Options
- Video codec: Copy (no re-encoding, preserves original quality) or re-encode with H.264/H.265
- Audio codec: AAC encoding or stream copy if the audio format is already compatible with the output container
Frequently Asked Questions
Does dubbing degrade video quality? Not when using stream copy mode. The video is transferred byte-for-byte without re-encoding. Only the audio stream is replaced.
What if the new audio is longer than the video? SoundWorks trims the audio to match the video duration. You can also choose to extend the last video frame or let the output match the shorter stream.
What if the new audio is shorter? The remaining video will have silence, or you can trim the video to match the audio length.
Can I keep the original audio and add a second track? For adding background audio without removing the original track, use the Background Audio feature, which mixes tracks instead of replacing them.