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Can anyone tell me why this .mpg is so large ?
10-31-2009, 07:20 PM,
#1
Can anyone tell me why this .mpg is so large ?
It is only 16:50 in length yet it is 1.01 GB in size. :huh:

http://www.vaed.uscourts.gov/notablecases/...AQ00087DVD.html

Quote:Audio: 0x0000 48000Hz stereo 1536Kbps [LPCM]
Video: MPEG2 Video 720x480 (4:3) 29.97fps 7000Kbps [Video]

Converted to .FLV it is only 70.7 MB in size.
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10-31-2009, 08:52 PM,
#2
Can anyone tell me why this .mpg is so large ?
It's the high bitrate and sample frequency.
Normal CD audio is 44.1Khz and 48Khz is DVD quality with a high sample rate of that 48k signal. It's full film quality frames per second at 29.97 and then 7kbps video also is a very high sample rate. Judging from the specs, it looks to me like an uncompressed digital copy.
“Today’s scientists have substituted mathematics for experiments, and they wander off through equation after
equation, and eventually build a structure which has no relation to reality. ” -Nikola Tesla

"When the power of love overcomes the love of power the world will know peace." -Jimi Hendrix
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10-31-2009, 09:17 PM,
#3
Can anyone tell me why this .mpg is so large ?
Thank you for your prompt reply. :)

:slap:

I was comparing it to the wrong video...

I got
http://www.vaed.uscourts.gov/notablecases/...AQ00081DVD.html ( 16:26 )
and
http://www.vaed.uscourts.gov/notablecases/...on/AQ00081.html
( Audio: MPEG Audio 44100Hz stereo 192Kbps [Audio] Video: MPEG1 Video 352x240 (107:80) 29.97fps 1150Kbps [Video] - 52:34 )
mixed up. :blush:
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10-31-2009, 09:41 PM,
#4
Can anyone tell me why this .mpg is so large ?
MPEG1 is digital satellite broadcast quality, which is essentially the next step down from uncompressed A/V. It is compressed along with the audio but the encoding still results in large files, as you see. In case you weren't aware, when I say compressed, that means a lossy codec. Some of the signal is lost in the encoding process, so that's where part of the size reduction comes from. When playing back these files, the codec uses the MPEG1 algorithm to "interpret" what the lost data was and this results in a fuzzy picture or audio with artifacts like pops and such.
“Today’s scientists have substituted mathematics for experiments, and they wander off through equation after
equation, and eventually build a structure which has no relation to reality. ” -Nikola Tesla

"When the power of love overcomes the love of power the world will know peace." -Jimi Hendrix
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11-01-2009, 12:16 PM,
#5
Can anyone tell me why this .mpg is so large ?
what are you using to display your video on? divx player perhaps? or a DVD?
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11-01-2009, 02:06 PM,
#6
Can anyone tell me why this .mpg is so large ?
Quote:what are you using to display your video on? divx player perhaps? or a DVD?

My currently default player - http://www.cccp-project.net/
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11-08-2009, 09:36 AM,
#7
Can anyone tell me why this .mpg is so large ?
Quote:Audio: 0x0000 48000Hz stereo 1536Kbps [LPCM]

yes, it's uncompressed audio. Rerendering the clip with an audio codec will dramatically reduce the file size.
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