Motorola Razr V3x Personalization Guide (MoGu V3xPG) V2.5
(Volume 1 - Primary Mods)
V3X Personalization Guide-V2-5-eb-v1-061205.doc 211 of 227
ebentley
• Using your favorite Hex editor, open the SEEM
• Go to offset 1A1 (Menu>Address>Go To)
• Change the value to 03 (bit 0 and bit 7 ON) improves the quality of the mp4 a little bit. The diff that I saw
is the sound recorded in stereo mode.
• Save the file and upload it to your phone
[vtcom] @nameejokerz... Good post dude and thanks for your seem findings, I've successfully changed from 3GP to
MP4 recording. And the comparison I've made was a 1 minute recording before and after the seem edit and the results
are described below:
3GP=1111kbs
MP4=1140kbs
I won't worry about the size differences even it's much bigger but it's still MP4. Still, I've yet to see what's under the
hood as a MP4format is a container object that carries lots of audio & video codecs inside. Hopefully I'll get the results
soon. Update: Alright, I've managed to get some info on recorded 3GP & MP4 properties; (File Information was
obtained by Xilisoft Video Converter 3)
3GP
Video Format: h263
Video Size: 176x144
Video Bitrate: 149kbps
Video Framerate: 12.47fps
Audio Format: amr_nb
Audio Bitrate: N/A
Audio Sample Rate: 8000Mhz
Audio Channels: Mono
MP4
Video Format: h263
Video Size: 176x144
Video Bitrate: 153kbps
Video Framerate: 12.43fps
Audio Format: amr_nb
Audio Bitrate: N/A
Audio Sample Rate: 8000Mhz
Audio Channels: Mono
Not much of a difference except for the bitrate and if only the MP4 recording uses h264 video codec w/ AVC audio
codec, we will be very pleased with our V3x. h.263 video codec is fine but I just don't like the amr audio as it's always
mono in recording. I'm leaving the video experts (if any) to further elaborate on these as I'm still at a learning stage of
video formats.
Update: Robin, I've been searching on the net for a free 'baseline' mobile phone H.264 codec but without luck. All I've
got were reports and future releases from companies to embed this codec into mobile chips. Unless you're good in
video/audio codecs and understands deeply on mobile phone's platform, the Development Kit is useless for us. Also,
for the framerates, all I can say is this is handled by mobile phone's Digital Signal Processor (DSP) as currently, it can
only handle up to 15 and possibly higher on some phones like the Nokia N93 or SE P990i. Even on some newer
phones like Nokia N91 which I have, when converting a video with 25fps into an XviD AVI format, N91 will lag as well.
So, I had to reduce the framerate in order for it to play smoothly.
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