PPro CS4/CS5 - Glitches in AVCHD video

P

ParrotEyes

Active member
I have been using CS4 for about 18 months and recently upgraded to CS5 Production Premium. I edit AVCHD video shot at 1080i60 on a Panasonic HMC-150. My computer is an i750, 12Gram, Nvidia GTX470, and multiple drives. I have not, nor do I have now, had any problems with the overall playback of the basic AVCHD video. Project settings are correct for the source video.

What I noticed recently that has me concerned is a slight horizontal glitching at times, almost resembling video tape dropouts. This mostly appears on moving shots that have high contrast elements in the scene. This was observed on CS4 before the upgrade using an ATI radeon 4870 graphics card. I have since upgraded to CS5 and the GTX470, and the glitches still occur.

I do not remember if the video always did this or if it's something that recently developed. The glitches do not appear on exported material, but it is a little unsettling to see them none the less.

Has anyone observed similar behavior? I would feel much better if this is just a "normal" behavior for AVCHD in Premiere.


***CAUSE DISCOVERED***
It seems changing the Windows desktop preference from Aero to either Basic or Classic causes the video glitches described above, at least in my case. Restoring to Aero theme corrected the playback problem. Just FYI if anyone else is experiencing this.
 
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i have the same problem in CS5.
funny thing tho, if you add the clip to the time line and RENDER it, it plays smoothly.
i just think my cpu/gpu combo is below the requirements for CS5.
but i also dont have 1500$ for a quadro card! (screw you ADOBE!!)

Another way would be to transocde AVCHD to a more friendly uncompressed codec. AVCHD is highly compressed and takes alot of GPU power to decompress .

I am looking into getting a demo version of cineform and see if that eases the work flow, i just can't live with the glitch-ness, and rendering every frame to see what a filter does will kill me!
 
Thanks for your reply Alejo, but it doesn't seem you have the same problem.

As I stated, I have no problem with the overall playback performance. I can run multiple streams in real time at full resolution with no frame drops.

My concern is the random glitches that appear under the conditions described in my original post.
 
Alejo_NIN said:
just think my cpu/gpu combo is below the requirements for CS5.
but i also dont have 1500$ for a quadro card! (screw you ADOBE!!)
Click to expand...


I'm doing great with my GTX-470 card that cost around $350....you should look into that. It's an approved card with the 5.0.2 update.
 
From my experience the glitches are just from PP trying to decode AVCHD for playback in Premiere. It doesn't affect the exported footage, and when you stop playback it goes away. It's nothing to worry about. Perhaps decreasing the playback window might make the issue go away?
 
so i did some tests yesterday and got the AVCHD converter and transcoded everyhting from AVCHD to DVCPRO
i'll post updates later
 
ParrotEyes said:
I have been using CS4 for about 18 months and recently upgraded to CS5 Production Premium. I edit AVCHD video shot at 1080i60 on a Panasonic HMC-150. My computer is an i750, 12Gram, Nvidia GTX470, and multiple drives. I have not, nor do I have now, had any problems with the overall playback of the basic AVCHD video. Project settings are correct for the source video.

What I noticed recently that has me concerned is a slight horizontal glitching at times, almost resembling video tape dropouts. This mostly appears on moving shots that have high contrast elements in the scene. This was observed on CS4 before the upgrade using an ATI radeon 4870 graphics card. I have since upgraded to CS5 and the GTX470, and the glitches still occur.

I do not remember if the video always did this or if it's something that recently developed. The glitches do not appear on exported material, but it is a little unsettling to see them none the less.

Has anyone observed similar behavior? I would feel much better if this is just a "normal" behavior for AVCHD in Premiere.
Click to expand...


***CAUSE DISCOVERED***
It seems changing the Windows desktop preference from Aero to either Basic or Classic causes the video glitches described above, at least in my case. Restoring to Aero theme corrected the playback problem. Just FYI if anyone else is experiencing this.
 
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