.rm to avi.

[safman1]

Hey all I need help. I followed the instructions found on this web site to convert .rm to avi., but am having no luck. When the conversion is done and I p0lay back the "avi." the picture can not keep up with the sound. What gives? I am using the Tinra and Tinra Gui programs. Any help would be very appreciated and please make it somewhat easy to understand as I am kinda new to this. Thanks

[tinmancp]

That happened to me also. I open up the AVI generated and went into halfway of the movie, it turned out the FPS is different, slightly lower than at the beginning of the movie. I know the error, but not the solution.

[Graham Meredith]

I've had the same problem with RM files and asf files. I think it depends on how much the clip is encoded with variable bit rate. I can confirm that the converted AVI from an asf clip I did slowed down AND sped up at parts: I downloaded a music video clip in asf, converted, then got an mp3 of the same song (constant bit rate) and converted it to a wave file. Then I imported the avi and the wav file into a video editor time line and compared the audio to both of them. The avi's audio was out of sync with the video, and so was the imported wav, but the avi sound WAS IN SYNC with the IMPORTED wav (reasonably). ie it seems that it's not the audio that goes out of sync, but the VIDEO. The audio is the one that is correct. I had to splice the video in places to get it to align with the wav file. Interesting, there were places where it came back into sync, indicating that it sped up AND slowed down.

All this hints to me about the problems with heavily compressed files such as rm and asf - you get to a point where you throw out so much data in the compression stage that its not surprisisng to have massive errors upon decompressing.

Graham

[ajl]

Quote from the Tinra GUI Support Forum
http://guiguy.wminds.com/forums/viewtopic.php?topic=25&forum=5&3
(in one line!)
<quote>
This is an audio / video sync issue. It results because RealMedia clips are encoded using variable frame-rates and AVI clips are encoded using a constant frame-rate. Many different programs have ways of fixing this, but here's the method that I like best:
Using VirtualDub, choose direct stream copy from audio and video pulldown menu's in VirtualDub, and under video - frame-rate, choose "change so video and audio durations match". Now Choose File - Save AVI and save to a synced AVI.
This just syncs the file. If you want to compress the file to a smaller format at the same time, instead of choosing direct stream copy from the audio and video drop down menu's, you can choose full-processing and set the compression options you want...
</quote>