Why are the audio and video out of sync?
There have been numerous reports of “lip sync” problems, where the audio lags slightly behind the video. Perception of a sync problem is highly subjective–some people are bothered by it while others can’t discern it at all. Problems have been reported on a variety of players (notably the Pioneer 414 and 717 models, possibly all Pioneer models, some Sony models including the 500 series, new Toshiba models including the 3109, and some PC decoder cards). Certain discs are also more problematic (notably Lock, Stock, and Two Smoking Barrels; Lost In Space; TRON; The Parent Trap; and Austin Powers). The cause of the sync problem is a complex interaction of as many as four factors • Improper sync in audio/video encoding or DVD-Video formatting. • Poor sync during film production or editing (especially post-dubbing or looping). • Loose sync tolerances in the player. • Delay in the external decoder/receiver.
There have been numerous reports of “lip sync” problems, where the audio lags slightly behind the video, and even reports of the audio coming before the video. Perception of a sync problem is highly subjective–some people are bothered by it while others can’t discern it at all. Problems have been reported on a variety of players (notably the Pioneer 414 and 717 models, possibly all Pioneer models, some Sony models including the 500 series, new Toshiba models including the 3109, and some PC decoder cards). Certain discs are also more problematic (notably Lock, Stock, and Two Smoking Barrels; Lost In Space; TRON; The Parent Trap; and Austin Powers). The cause of the sync problem is a complex interaction of as many as four factors 1. Improper sync in audio/video encoding or DVD-Video formatting. 2. Poor sync during film production or editing (especially post-dubbing or looping). 3. Loose sync tolerances in the player. 4. Delay in the external decoder/receiver.
By default, VideoBlaster uses Audio for its timing, but does not actively synchronize the video with the audio. This method usually works fine for videos which are encoded correctly such that the framerate is equal to the number of video frames divded by the length of audio which is played. If this is not the the case, or if the video is coming from a network stream, the audio and video may become out of sync. This can be fixed in two ways. By pressing the + and – keys, users can actively change the video offset until the two streams match. The tag, –enable-audio-sync may also be added in the command line to actively sync audio and video. This synchronization procedure is still in early stages of development.
There have been numerous reports of “lip sync” problems, where the audio lags slightly behind the video or sometimes precedes the video. Perception of a sync problem is highly subjective; some people are bothered by it while others can’t discern it. Problems have been reported on a variety of players (notably the Pioneer 414 and 717 models, possibly all Pioneer models, some Sony models including the 500 series and the PS2, some Toshiba models including the 3109, and some PC decoder cards). Certain discs are also more problematic (notably Lock, Stock, and Two Smoking Barrels; Lost In Space; TRON; The Parent Trap; and Austin Powers). The cause of the sync problem is a complex interaction of as many as four factors: 1. Improper sync in audio/video encoding or DVD-Video formatting. 2. Poor sync during film production or editing (especially post-dubbing or looping). 3. Loose sync tolerances in the player. 4. Delay in the external decoder/receiver.
There have been numerous reports of “lip sync” problems, where the audio lags slightly behind the video or sometimes precedes the video. Perception of a sync problem is highly subjective; some people are bothered by it while others can’t discern it. Problems have been reported on a variety of players (notably the Pioneer 414 and 717 models, possibly all Pioneer models, some Sony models including the 500 series and the PS2, some Toshiba models including the 3109, and some PC decoder cards). Certain discs are also more problematic (notably Lock, Stock, and Two Smoking Barrels; Lost In Space; TRON; The Parent Trap; and Austin Powers ).
