NXV: Difference between revisions
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Suxen drol (talk | contribs) (NXV demystified) |
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* Samples: tbd | * Samples: tbd | ||
NXV is a | NXV is a container format used by the "Brando MP4 Watch" product. The wrist watch is reported to support MP4, WMV and WMA, however this is achieved by first converting the files to the NXV format. | ||
==Container Format== | ==Container Format== | ||
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==Audio Payload== | ==Audio Payload== | ||
The audio payload is an | The audio payload is an [[MP3]] stream, including RIFF WAVE headers. | ||
==Video Payload== | ==Video Payload== | ||
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==Notes== | ==Notes== | ||
* The version number appears | * The version number appears to have no influence on the container file format. | ||
* Supported video resolutions are: 96x64, 96x80, 96x96, 128x96, 128x128, 160x128, 176x128. Despite the reduction in video resolution, the resulting NXV file exceeds that of the input video file. | * Supported video resolutions are: 96x64, 96x80, 96x96, 128x96, 128x128, 160x128, 176x128. Despite the reduction in video resolution, the resulting NXV file size exceeds that of the input video file. | ||
* Intermediate files are used by the NxvConverter program to store the audio and video payloads (filename.mp3 and filename.tmp) prior to muxing to the NXV file. | * Intermediate files are used by the NxvConverter program to store the audio and video payloads (filename.mp3 and filename.tmp) prior to muxing to the NXV file. | ||
Revision as of 05:20, 6 January 2007
- Extension: nxv
- Samples: tbd
NXV is a container format used by the "Brando MP4 Watch" product. The wrist watch is reported to support MP4, WMV and WMA, however this is achieved by first converting the files to the NXV format.
Container Format
bytes 0-11 ASCIIZ magic ("NXV File")
bytes 16-19 ASCIIZ version ("1.0.0", "3.0.1" or "3.0.2")
byte 20 width (pixels)
byte 21 height (pixels)
byte 22-23 unknown (little endian)
byte 24-511 rand byte
(The a/v sequence commences at byte 512.)
while eof
u8[0x7fc] audio payload
le16 length (bytes)
le16 unknown
u8[length] video payload
Audio Payload
The audio payload is an MP3 stream, including RIFF WAVE headers.
Video Payload
Raw video. 0.5 bits per pixel.
Notes
- The version number appears to have no influence on the container file format.
- Supported video resolutions are: 96x64, 96x80, 96x96, 128x96, 128x128, 160x128, 176x128. Despite the reduction in video resolution, the resulting NXV file size exceeds that of the input video file.
- Intermediate files are used by the NxvConverter program to store the audio and video payloads (filename.mp3 and filename.tmp) prior to muxing to the NXV file.