Speedy playback

[MasterThomasMI]

Greetings

I have seen that alot of video clips are playing back extremely fast. I'm not sure why because I see the video. The audio seems in sync (fast also). Can someone point me in the right direction to fix this please.

[MasterThomasMI]

No ideas out there ?

[aedipuss]

not enough info to go on. ??? what video? what player? where'd it come from? ever work?

[MasterThomasMI]

Your right I thought it obvious

The video clips are generally fromt he web.
I have tried playing them on my pc with either media player or vlc.

It's not ALL video clips but enough thats it's very frustrating.

[jagabo]

Open one of your fast videos with GSpot. Post a screencap of the GSpot window.

[MasterThomasMI]

I have tried to see what sets these speedy vids apart with gspot but haven't noticed anything

[Richard_G]

How fast is fast? The clip is 25 fps which is PAL framerate, you are in NTSC country which uses 29.97 fps, are they being played at this speed so speeding playback up?

[MasterThomasMI]

Fast is a 10 second clip playing in 5 seconds

[jagabo]

I wonder if the 32000 Hz sampling and 32 kbps bitrate is confusing the player. Obviously, it shouldn't be a problem but some combination of MPEG splitters/decoders and audio renderers might be messing up.

Are the sounds hight pitched in addition to playing fast? Do people sound like chipmunks?

[MasterThomasMI]

Are the sounds hight pitched in addition to playing fast? Do people sound like chipmunks?

Exactly

[jagabo]

So it sounds like the 32 KHz audio is being sped up to 44.1 or 48 KHz on playback and the frame rate is being bumped up by the same amount.

It's hard to say exactly what is causing this. Normally I would guess a problem between the DirectShow MPEG splitter and decoders but if VLC has the same problem that seems unlikely (VLC has its own MPEG handling).

Do these videos play properly on other systems?

[Flyersfan72]

Hi. I'm having a similar issue. I noticed too that the files that won't play at the correct speed for me are the ones at 32 KHz. I've tried using WMP 10, WMP Classic (6.4.9.1125), ProShow Producer and Roxio 8. All with the same squirrely sounding voices.

Then I tried Media Player Classic(6.4.9.1) and it worked. Normal speed.

I have a basic understanding of codecs but not enough to now figure out what the old Media Player is doing compared to the other programs mentioned above.

When I use GSpot to check on a 32 KHz video everything looks "ok" until I try "Proposed Codec Solutions and Tests". When I use the Microsoft Standard rendering tests, it completes and the video will play in the preview window but the sound is too fast. When I use the proposed GSpot audio rendering it fails on all tests and will not let me preview it (since nothing could be rendered I guess). The GSpot proposed video rendering works and the video will play, without audio of course.

So it seems like it might be an audio codec issue, in my case at least, and may be the case for the original poster.

So what does Media Player Classic (6.4.9.1) do differently when it comes to audio? I can provide any more info if anyone thinks they might be able to help.

Thanks in advance for any suggestions.

[jagabo]

I belive MPC has its own MPEG parsing. It definitely has its own MPEG audio and video decoding. You can view the filters it is using by right clicking on the video while it is playing and selecting Filters. You can usually select one of the filters to get information about what it is doing or any special settings that are available.