(je vous met la version anglaise, j'ai décris le truc à avosmac en francais- à paraitre ?)
Subject: ASF Bug correction to use Mustek DV on Mac OS X
On Mac OSX, the only way to read the ASF video files issue from Mustek
DV,
is the app VLC (VideoLanClient)
But VLC can only read the 320x240 videos, with sound.
( the Mac Window media player can only read the 320x240 too, but
without sound)
With VLC, 352x288 and 640x480 are drawing as 320x240 jam, with sound.
The bug is in the ASF file, in the "EBIH" (Extended Bit Map Info
Header) MP4S
video_object_layer_width 13 bits Frame Width
marker_bit 1 bit 1
video_object_layer_height 13 bits Frame Height
At offset 01AB (427) the EBIH is (2)8 50 20 F0.= (1)0000101000000 1
0000011110000=320 (1) 240
But it is the same value for 352x288 and 640x480 !
To read the video on Mac OS X with VLC, you must correct the ASF File
as follow:
at offset 01AB (427 decimal) replace the 28 50 20 F0
- with 28 58 21 20 for 352x288 videos
- with 28 A0 21 E0 for 640x480 videos