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Hi team, Currently, I use API to generate the video, but I found that the video has two voices if I choose the video background and the background has voices.

Your agent told us when using video assets through the API, the video's original audio is actually muted by default.

The params : {"test": false, "title": "demo", "caption": true, "dimension": {"width": 1920, "height": 1080}, "video_inputs": [{"voice": {"type": "text", "pitch": 0, "speed": 1.0, "voice_id": "8ad25d75a1d944c6a36d9fdbd1892657", "input_text": "\nThe unexpected PPI softness follows the recent cooling in consumer price inflation, providing further evidence that price pressures may be easing in the U.S. economy. This is likely to strengthen the Federal Reserve's confidence in its efforts to moderate inflation through interest rate hikes. The central bank has held rates at an over-two-decade high since last July, and is projecting just one cut this year as it awaits more progress on inflation."}, "character": {"type": "avatar", "scale": 1.0, "offset": {"x": 0.0, "y": 0.0}, "avatar_id": "Kristin_public_20240108", "avatar_style": "normal"}, "background": {"fit": "cover", "type": "video", "play_style": "loop", "image_asset_id": "", "video_asset_id": "8e815a50afc44a999f84f601f90ebbc0"}}]}