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Hello. The problem I'm having is that when I publish a swf movie or export a quicktime movie from flash I get lag in the playback. There is no audio associated with my project, the stage dimensions are 1920 X 1080, and the frame rate is 29.97.

I've tried changing my stage size, increasing and decreasing my frame rate, and exporting with different compressions types. If I just knew why it lags I could figure out how to fix it. Unfortunately I am clueless as to the source of the lag.

Thanks in advance for any advice.

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  • Latest Post Latest Post by Member #334542

Dani AI

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As described the export lags but can play the SWF fine, the issue is most often either heavy runtime rendering (big vectors, masks, filters, lots of active timelines) or a client/export pipeline problem (player settings, wmode/acceleration, or the video codec used at export). Narrowing which side is at fault is the first step.

Try these checks in order: test the SWF in the standalone FlashPlayer (projector) and on a different machine to separate file vs. client; temporarily disable any ActionScript (or remove movieclip timelines) to see if code is the bottleneck; toggle the Flash Player hardware-acceleration setting and, if embedded in a page, try changing/removing wmode (transparent/opaque can kill GPU acceleration); export a very short portion or at lower resolution to compare; and measure actual FPS with a profiler or a simple FPS counter to confirm whether frames are being dropped or the player is simply slow to decode the exported movie.

If rendering is the bottleneck, reduce work per frame: convert static vector art to bitmaps or pre-render complex animations to sprite sheets or bitmap movieclips; avoid many overlapping masks, filters, gradients and blend modes; call stop() on timelines that do not need to run; and use cacheAsBitmap only for static display objects (it can hurt performance if applied to frequently changing content). For frame-by-frame sequences, exporting to a bitmap sequence and using a dedicated encoder will often give smoother results than the Flash-to-QuickTime direct path.

If QuickTime/video export stutters while the SWF itself runs smoothly, try exporting a PNG sequence and encoding with Adobe Media Encoder or ffmpeg to H.264 at a constant frame rate, or test other codecs. Finally, profile (Flash Builder profiler / Adobe Scout or a simple FPS meter) to find hotspots; that data will tell whether to optimize artwork, code, or the export/codec pipeline.

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your links shows its working fine

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