The text I've created (in GIMP), with transparent background, (200 x 29) added as a watermark.png to a web video php script, displays ok on the uploaded video, overlayed as a watermark, on the smaller screen, but still not really sharp looking, and definitely unsharp/jagged when full screen is selected. I tried to attach the screen shots, but got a message that they exceeded the limit. So, they can be seen here: http://gimpforums.com/thread-text-as-watermark-looks-unsharp?pid=96416#pid96416 How can this be improved? I look forward to any assistance.
Have you tried uploading a larger watermark image? Probably, when the image gets stretched full screen the watermarked image is way too small.