- Download GPAC and install it on your computer.
- Extract the H264 from the MPEG4 file:
MP4Box -raw 1 attr_2_resiliance03_sonyavc.mp4
assuming that stream 1 contains your H264.
- Merge with AC3 audio:
MP4Box -add attr_2_resiliance03_sonyavc_track1.h264 -add attr_2_resiliance03.ac3 merged.mp4
Update: this bug only shows up if the audio rate is higher than 192kbit/sec.