Sorenson Squeeze compression causes sound to be not in sync with video

psaad · 05-22-2008, 09:55 PM

After compressing a .mov file (2GIG) using the following modified preset in Sorenson Squeeze:
.flv VP6_768K_Stream
Frame size: 640x480
Display Aspect Ration Policy: Letter Box
Drop Frames to Maintain Data Rate: 90
--> I also tried with 20 dropped frames and even disabling that features and it still happens

My resulted .flv file's audio and video, when added in a flash file as a new (Actionscript-controlled) video, is not well synchronized.
Its starts synchronized and a few seconds after, the audio is unsynchronized from the video.

This happens when I play the flash file locally, its not even on a web server yet.

If it helps understand my problem:
The original .mov file was generated from an After effects edit I made. I compressed it into a .mov file using the Add to Render Queue, using the Animation preset for the Video Format. I made sure to keep the same fps setting at Medium quality.

But again, this issue does not happen to my original .mov file.

Did anyone encounter that issue when compressing a .mov file into a VP6 flv at 768k stream ? If so, do you know of a way to compress it so that sound and video always stay in sync?

I am using a MacBook Pro 15.4inch
Sorenson Squeeze 4.5.3
Flash CS3

Would appreciate any help possible.

Thanks.

Patrick

mworley007 · 02-23-2009, 01:06 PM

I had the same issue and have (finally resolved it). I don't believe it matters what you're compressing TO, it seems to happen similarily with a variety of options. It was recommended that you should try changing the frame rate (under video preset settings) to 30fps. That worked for some folks. However, mine did not sync until I went to 25 fps and it works perfectly now. I think youtube even offers this advice in their FAQs on video issues.

05-22-2008, 09:55 PM	#1 (permalink)
psaad Registered User Join Date: May 2008 Posts: 1 OS: MAC OSX	Sorenson Squeeze compression causes sound to be not in sync with video After compressing a .mov file (2GIG) using the following modified preset in Sorenson Squeeze: .flv VP6_768K_Stream Frame size: 640x480 Display Aspect Ration Policy: Letter Box Drop Frames to Maintain Data Rate: 90 --> I also tried with 20 dropped frames and even disabling that features and it still happens My resulted .flv file's audio and video, when added in a flash file as a new (Actionscript-controlled) video, is not well synchronized. Its starts synchronized and a few seconds after, the audio is unsynchronized from the video. This happens when I play the flash file locally, its not even on a web server yet. If it helps understand my problem: The original .mov file was generated from an After effects edit I made. I compressed it into a .mov file using the Add to Render Queue, using the Animation preset for the Video Format. I made sure to keep the same fps setting at Medium quality. But again, this issue does not happen to my original .mov file. Did anyone encounter that issue when compressing a .mov file into a VP6 flv at 768k stream ? If so, do you know of a way to compress it so that sound and video always stay in sync? I am using a MacBook Pro 15.4inch Sorenson Squeeze 4.5.3 Flash CS3 Would appreciate any help possible. Thanks. Patrick

02-23-2009, 01:06 PM	#2 (permalink)
mworley007 Registered User Join Date: Feb 2009 Posts: 1 OS: Vista	Re: Sorenson Squeeze compression causes sound to be not in sync with video I had the same issue and have (finally resolved it). I don't believe it matters what you're compressing TO, it seems to happen similarily with a variety of options. It was recommended that you should try changing the frame rate (under video preset settings) to 30fps. That worked for some folks. However, mine did not sync until I went to 25 fps and it works perfectly now. I think youtube even offers this advice in their FAQs on video issues.