[Ffmpeg-devel] [PATCH] Add support for the NXV container
Fri Feb 23 08:47:19 CET 2007
The NXV file format is used by the Brando MP4 watch and a few other
small gadgets that seem to be based on the same core.
The format is documented here:
http://wiki.multimedia.cx/index.php?title=NXV All of that is reverse
engineered, so it's likely that some parts have errors or are incomplete.
The decoder portion of this code has been tested against a dozen or so
NXV files encoded with the official Windows software at different
resolutions and quality levels.
The encoder currently only support one quality level, but with different
resolutions and framerates. The different quality levels, from a quick
look, appear to just be telling the watch to scale by 2x2 or 4x4 instead
of making the video a little window on the watch.
The A/V sync is a bit problematic, some of which is probably due to the
format relying on the MP3 bitrate staying stable and precise.
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