On Sun, 24 Jan 2010 02:26:29 +0100, gregor herrmann wrote: > (The messing around with duration, vrate, bitrate, vframes etc. in > the code confuses me.)
Sometimes trial and error leads to interesting results: With ...
#v+
--- Info/MPEG/System.pm (revision 51501)
+++ Info/MPEG/System.pm (working copy)
@@ -376,7 +376,7 @@
if ( $type == 1 ) {
my $highbit = ( $self->get_byte( $offset ) >> 3 ) & 0x01;
- my $low4bytes = ( ( $self->get_byte( $offset ) >> 1 ) & 0x30 ) <<
30;
+ my $low4bytes = ( ( $self->get_byte( $offset ) >> 1 ) & 0x62 ) <<
62;
$low4bytes |= ( $self->get_byte( $offset + 1 ) << 22 );
$low4bytes |= ( ( $self->get_byte( $offset + 2 ) >> 1 ) << 15 );
$low4bytes |= ( $self->get_byte( $offset + 3 ) << 7 );
#v-
... the tests pass both on i386 and amd64.
Whatever that tells us :)
Cheers,
gregor
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