My Android app does live video processing using OpenGL. I'm trying to save it to video using MediaMuxer and MediaCodex.
The performance it not good enough. Each cycle the screen is updated, and it is saved to file. The screen is smooth, the video file is horrible. By this I mean major motion blur when it changes quickly and the frame-rate appears to be 1/2 or 1/3rd of what it should be.
It seems to be a limitation due to clamping of settings internally. I can't get it to spit out a video with a bit rate greater than 288KBPS. I think it is not clamping the requested parameters because there is no difference in frame rate for 1024x1024, 480x480, and 240x240. If it was having trouble keeping up, it should at least improve when the number of pixels drops by a factor > 10.
The app is here : https://play.google.com/store/apps/details?id=com.matthewjmouellette.snapdat.
I would love to post a code sample, but my program is 10K lines of code, with a lot of relevant code just for this problem.
Any help would be greatly appreciated.
EDIT:
I've tried like 10+ different things. I'm out of ideas right now. I wish I could just save the video uncompressed, the hard-drive should be able to keep up with a small enough image and medium fps.
It seems to be that the encoding method just doesn't work for my video. The frames differ to much, to try to "move" one part of the frame, as a sort of encoding. Instead I need full frames throughout. I am thinking something along the lines of M-JPEG would work really well. JPEGs tend to take 1/10th the size of a bitmap. It should allow a reasonable size, with almost no processing power required by the CPU, since it is image compression not video compression which we are doing. I wish I had a good library for this.