Post Description

BBC HD - Nature's Great Events 02 - The Great Salmon Run

Every year grizzly bear families in North America depend for their survival on a spectacular natural event: the return of hundreds of millions of salmon from the Pacific Ocean to the mountain streams where they were born. The salmon travel thousands of miles to spawn and then die. The great run not only provides food for bears, but for killer whales, wolves, bald eagles, and even the forest itself. The question is: will the salmon return in time to keep hungry bears alive?

A mother grizzly and her cubs emerge from their den high in snowy Alaskan mountains. Filming from the air the team capture a TV first, following the bears as they negotiate a near vertical slope on their journey to the coast where they await the return of the salmon.

Meanwhile, the salmon are making their way to the to river mouths where they must swim upstream and against the current. The programme reveals how they tackle the torrents and leap over waterfalls, a feat equivalent to a human jumping over a house.

Dozens of hungry bears eagerly await the salmon that make it up river. In another TV first, underwater cameras record the ingenuity and fancy footwork they use to collect dead salmon from the bottom of deep pools.

MEDIA INFO:

Video
ID                               : 1000 (0x3E8)
Menu ID                          : 1650 (0x672)
Format                           : MPEG Video
Format version                   : Version 2
Format profile                   : Main@High
Format settings, Matrix          : Default
Duration                         : 49mn 17s
Bit rate mode                    : Variable
Bit rate                         : 16.7 Mbps
Nominal bit rate                 : 17.6 Mbps
Width                            : 1 920 pixels
Height                           : 1 080 pixels
Display aspect ratio             : 16:9
Frame rate                       : 25.000 fps
Colorimetry                      : 4:2:0
Scan type                        : Interlaced
Scan order                       : Top Field First
Bits/(Pixel*Frame)               : 0.323
Stream size                      : 5.76 GiB (91%)

Audio
ID                               : 1001 (0x3E9)
Menu ID                          : 1650 (0x672)
Format                           : AC-3
Format/Info                      : Audio Coding 3
Duration                         : 49mn 17s
Bit rate mode                    : Constant
Bit rate                         : 448 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Surround: L R, LFE
Sampling rate                    : 48.0 KHz
Video delay                      : -195ms
Stream size                      : 158 MiB (2%)
Language                         : English