I have encoded a video to a raw 264 bitstream using x264. JM decoder correctly decode the video. However, when I try to extract the modes and motion vectors of the macroblock by printing out the macroblock info, they print out the wrong values. Have anyone experience these before ?
A:
man, motion vector data and modes are not written into the avc bitstream. Only difference between the MV being encoded and its predictor. This is also true for block modes.
Alexander Solonsky
2010-01-21 04:09:15
A:
I modified JM decoder to calculate and print the correct MVs and modes. I verified the result with videos encoded by JM itself. However, it does not work for .264 bitstream encoded by x264. But still, the video is decoded correctly.
Jason
2010-01-21 04:12:36
A:
Do you think it makes any sense, that the decoder inteprets x264 data incorrectly and still decodes it fine ? What options do you use in x264 and JM ?
Alexander Solonsky
2010-01-21 04:20:38