Can anyone explain – or point me to a resource that explains – these options in the MPEG2 settings?
- Macroblock Quantization?
- VBV Buffer Size?
- Noise Control (Sensitivity/Reduction) ?
- Write SDE?
- Intra DC Precision (8/9/10 bits) ? (in tests 10 bit gave much better results especially with graphics and scenes that are mostly white.)
- Ignore Frame Interval?
We are looking into using MPEG2 as a delivery and/or archiving codec, and trying to get as close as possible to ProRes 422 quality.
We've tried high bitrate H264 and MPEG2, with great results. But MPEG2 gave amazing results with MUCH smaller files (about 15% of the ProRes.)
Trying to understand these extra settings in order to optimize our conversion.
Also, at first I used the default GOP Settings of 3 M Frames and 15 N frames, but with GOP Size of 1. Then I tried setting M and N to 1, but, unexpectedly, the result was worse, especially for graphics. This doesn't make sense to me. I thought using all I-frames was supposed to reduce artifacts?