previewmode Attribute
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
Note
[Deprecated. This API may be removed from future releases of Windows.]
The previewmode attribute specifies the preview mode for the group. If the value is TRUE, frames might be dropped during preview. Otherwise, no frames are dropped during preview. The default value is TRUE.
Possible Values
The following values are defined as TRUE: y, Y, t, T, 1. The following values are defined as FALSE: n, N, f, F, 0 (zero).
Applies To
Remarks
Under the default setting, frames are dropped while previewing slow effects or transitions, to keep the video synchronized with the audio. The video might look choppy as a result. Setting this attribute to FALSE forces every frame to render during preview, possibly resulting in the video becoming out of sync with the audio. Frames are never dropped when writing to a file.
See also
Palaute
Tulossa pian: Vuoden 2024 aikana poistamme asteittain GitHub Issuesin käytöstä sisällön palautemekanismina ja korvaamme sen uudella palautejärjestelmällä. Lisätietoja on täällä: https://aka.ms/ContentUserFeedback.
Lähetä ja näytä palaute kohteelle