I believe Sony uses a proprietary format for its videocams and HD camera videos. See what the command line mediainfo says with
Code:
mediainfo -l /path/to/video.mp4
Mediainfo is in the repos.
Your sample plays fine here (a smiling baby with a green sleeved arm) but there is no sound; mediainfo does not find any audio either.
Your resolution is also much lower than you say in your original post, being reported by mediainfo as
Code:
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 fps
Color space : YUV
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