Poor embedded video performance

[SteveChennells]

Hello there,

I've collected lots of science videos that i can embed into flipchart pages. Problem is they seem to play at areduced frame rate and the sound is lagging behind. They play just fine in Quicktime and in APs own player. Is there anything I can do to improve this? will it be fixed in 2.5?

I'm using first generation Emac with 512mb RAM.

cheers

Steve

[UzMac]

Hi,

I have checked and the first eMac series P69 comes with NVIDIA GeForce AGP2 32MB VRAM - seems sufficient for reasonable playback.

Are the movies you embed of that great quality so playback is poor? DV stream?


UzMac
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[SteveChennells]

Well, we have videos in 2 formats...

1st is Quicktime MPEG4 yuv420p encoded at 640x352.

These have poor frame rate (i.e. obviously jerky) and the sound lags enough to make speakers irritating to watch.

2nd format is MPEG-1 at 320x240

These are still jerky and obviously not at full frame rate although the sound is in sync on these.

All the videos play fine outside of Activprimary (ie in Quicktime, VLC etc)

cheers

Steve

[Jos]

I can reproduce the problems you are having with MPEG 4 movie embedded into Activprimary. We are working hard to improve it. I expect these improvements will be in v2.5 AP2. You can significantly improve the playback by reducing the size of the movie with very little loss of quality. I have attached two example flipcharts. EmbeddedMpeg4Small2.flp is less than 1/10 size of EmbeddedMpeg4.flp but quality is similar. The embedded movie in EmbeddedMpeg4Small2.flp plays back well, with out any jerkiness or loss synchronisation between audio and visual.

[Vicky-d]

Dunno how useful this is but I've discovered that if you export the movie using the expert settings in QuickTime Pro if you set the Audio settings to 'Float (Big Endian)' there is more chance of the audio staying in sync with the video!