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PVR - Differing File Size
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send2gl
Newbie
_ 		30. October 2013 @ 14:15 _ Link to this message    Send private message to this user   
I have a video recorder with TV tuner, recorded programs can be exported to USB or via network to a .ts file which I understand is mpeg2

I recorded two different programs recently; noticing a big difference in file size I used ffmpeg to compare and noticed the following main difference;

Video stream video 1 15000 kb/s
Video stream video 2 2794 kb/s

Each video was by a different broadcaster (one UK BBC and one UK ITV) but recorded on the same device so I am a wee bit puzzled; I thought it was the format recorded in that set the file size, it looks like I am wrong if someone could clarify for me please.

Geffers
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This message has been edited since posting. Last time this message was edited on 30. October 2013 @ 14:42
attar
AfterDawn Addict
_ 		30. October 2013 @ 17:32 _ Link to this message    Send private message to this user   
The bitrate allocated to the channel (multiplied by the running time) sets the file size.
Not being in the UK, I can't say for sure, but North American stations may have more than one channel multiplexed in the same signal thus the available bitrate may be being divided more to channel-1 than channel-2.
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