Is it possible to enhance the quality of videos such as avi, mp4, xvid, flv, etc. Like there are filters for images such as hq2x, etc are there also filters for videos?
Suppose I have a 3gp video with 176x144 is there something that can increase its size to 320x240 while improving its video quality?
You won't be able to add information that's not there.
You are approximately doubling the dimensions of each frame so you will need to add pixels in between each of the existing ones. The best you can hope for is to interpolate the colour - this will give you a smooth image, but it will be more blurred than the original.
All the "image enhancement" stuff in movies doesn't actually work; When you convert, there's only two options: to stay the same quality or get worse. Like the other answer says, you cannot add pixels that aren't there in the original file. When you hear talk of "master" tracks, what happens is the producer makes the original file in extremely high quality, usually they down-convert to a normal resolution and then distribute it.
On a side note, think of what this could mean. We could download small movies, then upconvert them to massive resolutions.
