All this while I was able to play AVI videos normally with Winamp. Everything was still working fine until I downloaded .SRT subtitle file and played it together with AVI video. The video was playing upside down and the subtitles are being displayed from back to front.
AVI Video Upside Down Fix
I did some tests to try pinpoint the problem.

1. Use Winamp to play AVI video with subtitle – Video Upside Down
2. Use Winamp to play AVI video without subtitle – OK
3. Use Windows Media Player to play AVI video with subtitle – OK

At first I thought it had to be something wrong with the .SRT subtitle file but step 3 proves it’s not. I can only think of 2 possibility that might be causing the AVI video being played upside down which is Winamp player, or the codec settings that is associated with Winamp. I downloaded the latest official Winamp, installed it but still didn’t fix the problem. After a little searching and testing, I found a solution to fix the AVI video playing upside down problem.

I will try to explain in general on how to fix this video upside down problem because there are so many versions of codecs and also types of codec packs. The solution for playing these files correctly is to enable Xvid decoding in ffdshow. First of all, you need to know what codec is needed to play the AVI video. Here is an article on how to determine video codec required to play AVI video. Just a tip, MOST of the AVI files can be played with XVID codec.

Next you need to look for “ffdshow video decoder” shortcut to configure ffdshow video decoder. I have K-Lite Codec Pack installed on my computer, the ffdshow video decode shortcut is at Start -> Programs -> K-Lite Codec Pack -> Configuration -> ffdshow video decoder.

If you don’t have FFDShow installed, download the latest FFDShow from Free-Codecs website and install it. After installation, go to Start -> Programs -> ffdshow and run Video decoder configuration.

If the AVI video file requires Xvid codec to play, then at the left hand side Codecs page, set Xvid to “libavcodec“. If it’s H.264/AVC, then set “libavcodec” on H.264/AVC.
Configure FFDShow to fix video upside down

YAY! No more upside down video when playing AVI file with subtitles!

[tags]AVI, directvobsub, ffdshow, upside down, video, winamp[/tags]