Problem with recorded TV compression

karpago · 2006-12-19, 20:16

When I use the Compress option from Mediaportal 2.0.4. to convert a recorded TV program from dvr-ms format to mpeg, the output file has a different resolution from the original one. In fact, while the dvr-ms is 720x576, the resulting mpg is 544x576.
Could someone help me?

Thanks,
Carlo

Taipan · 2006-12-19, 23:06

Quote:

Originally Posted by karpago

while the dvr-ms is 720x576, the resulting mpg is 544x576.

The process to "convert" a dvr-ms file into an mpg file simply removes the dvr-ms wrapper from the original mpg stream - it does not change the parameters of the mpg file at all.

What are you using to determine the HxV pixel ratio of these files? I would suggest that whatever you are using is not reading the mpg header data correctly?

karpago · 2006-12-21, 16:22

Quote:

Originally Posted by Taipan

Quote:

Originally Posted by karpago

while the dvr-ms is 720x576, the resulting mpg is 544x576.

The process to "convert" a dvr-ms file into an mpg file simply removes the dvr-ms wrapper from the original mpg stream - it does not change the parameters of the mpg file at all.

What are you using to determine the HxV pixel ratio of these files? I would suggest that whatever you are using is not reading the mpg header data correctly?

--------------------------------------------------------------------------------

I use many tools, like Windows Media Player and VirtualDUB, and for all the resolution is 544x576.

Many thanks

diehard2 · 2006-12-21, 16:44

Hi karpago,

What TV card are you using?

Would it be possible for you to post an example file. say 30 seconds of video before and after conversion?

karpago · 2006-12-27, 11:03

My TV card is unfortunately :-( a Pinnacle PCTV300i.

Following your advice I tried to record few seconds of TV and compress it. The mpeg resulting file was 704x576.

So, I tried again to re-compress a big recorded program (about 4GB) to verify if something was changed, but I obtained again a 544x576 mpeg file. The source file format dvr-ms is the same, except of the size.

I'm thinking it may depend by the size of the source file.

Many thanks

2006-12-19, 20:16	#1 (permalink)
karpago Portal User Join Date: Dec 2006 Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Country:	Problem with recorded TV compression When I use the Compress option from Mediaportal 2.0.4. to convert a recorded TV program from dvr-ms format to mpeg, the output file has a different resolution from the original one. In fact, while the dvr-ms is 720x576, the resulting mpg is 544x576. Could someone help me? Thanks, Carlo

2006-12-21, 16:44	#4 (permalink)
diehard2 Portal Developer Join Date: Apr 2006 Location: Chicago Posts: 515 Thanks: 2 Thanked 13 Times in 9 Posts Country:	Hi karpago, What TV card are you using? Would it be possible for you to post an example file. say 30 seconds of video before and after conversion? Last edited by diehard2; 2006-12-21 at 16:56.

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2006-12-27, 11:03	#5 (permalink)
karpago Portal User Join Date: Dec 2006 Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Country:	My TV card is unfortunately :-( a Pinnacle PCTV300i. Following your advice I tried to record few seconds of TV and compress it. The mpeg resulting file was 704x576. So, I tried again to re-compress a big recorded program (about 4GB) to verify if something was changed, but I obtained again a 544x576 mpeg file. The source file format dvr-ms is the same, except of the size. I'm thinking it may depend by the size of the source file. Many thanks