For the second time
in a row:
BMPV are really bad, use JPGV for a good compression ratio.
JPGVs are big if compared to MP4 but they can reach a good compression rateo using Vorbis as audiocodec, the sample i provided months ago showed a JPGV of about 400 MB (for a video of 23 minutes) and it was not using Vorbis audiocodec [
http://rinnegatamante.netsons.org/videos/test2.php ].
I just tried right now to convert an MP4 to JPGV and the result is a 24:29 minutes video of about 145mb using 24.000 as samplerate, stereo audio with Vorbis audiocodec and LQ JPG setting.
The original MP4 file was 97 mb.
CIA archive are usable ONLY with CIA/3DS builds and NH1.X.