Quantcast KVCD: Unbeliveable Video Compression!!! - digitalFAQ.com Forums [Archives]
  #1  
11-30-2002, 08:42 AM
Razorblade2000 Razorblade2000 is offline
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I've got an (NTSC) .avi file of the movie "Halloween Resurrection" (1 hour 28 minutes). I tried to compress it with DVD2SVCD using the lbr .ini file from your forum (I changed The Minimum Bitrate to 500 kbit/s and the maximum to 5000 kbits/sec) on one 800 MB CD (800MB ISO->900MB MPEG).
I know that the Max Bitrate is way too high, but DVD2SVCD still want's to have a higher CQ Value than 100!!!

Look at the log (I canceled it when it went (again) too high with the CQ Value:



- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Executing TMPGEnc. Commandline:
"C:\Programme\TMPGEnc\TMPGEnc.exe" "M:\Encode\TMPGEnc_Project_file.tpr" /Encode /Close
Video Encoding finished.

- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Wanted: 839366524 (819694kb) Predicted: 385330157 (376299kb) Using CQ Value: 25.00
Calculated next CQ Value: 38.52
Executing TMPGEnc. Commandline:
"C:\Programme\TMPGEnc\TMPGEnc.exe" "M:\Encode\TMPGEnc_Project_file.tpr" /Encode /Close
Video Encoding finished.

- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Wanted: 839366524 (819694kb) Predicted: 475397342 (464255kb) Using CQ Value: 38.52
Calculated next CQ Value: 55.23
Executing TMPGEnc. Commandline:
"C:\Programme\TMPGEnc\TMPGEnc.exe" "M:\Encode\TMPGEnc_Project_file.tpr" /Encode /Close
Video Encoding finished.

- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Wanted: 839366524 (819694kb) Predicted: 532244545 (519770kb) Using CQ Value: 55.23
Calculated next CQ Value: 75.44
Executing TMPGEnc. Commandline:
"C:\Programme\TMPGEnc\TMPGEnc.exe" "M:\Encode\TMPGEnc_Project_file.tpr" /Encode /Close
Video Encoding finished.

- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Wanted: 839366524 (819694kb) Predicted: 564013983 (550795kb) Using CQ Value: 75.44
Calculated next CQ Value: 100.18
Executing TMPGEnc. Commandline:
"C:\Programme\TMPGEnc\TMPGEnc.exe" "M:\Encode\TMPGEnc_Project_file.tpr" /Encode /Close
Video Encoding finished.

- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Wanted: 839366524 (819694kb) Predicted: 580018606 (566424kb) Using CQ Value: 100.18
Calculated next CQ Value: 131.14
Executing TMPGEnc. Commandline:
"C:\Programme\TMPGEnc\TMPGEnc.exe" "M:\Encode\TMPGEnc_Project_file.tpr" /Encode /Close
Video Encoding finished.

- Encoding Test Clip M:\Encode\AviSynth_Script_file_CQ_TEST.avs
Wanted: 839366524 (819694kb) Predicted: 580018606 (566424kb) Using CQ Value: 131.14
Calculated next CQ Value: 171.65
...
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  #2  
11-30-2002, 11:07 AM
kwag kwag is offline
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Hi Razorblade2000,

You're throwing off the Q curve with too far apart distances ( MIN, MAX ) bit rates.
Lower the MAX bit rate to around 2,000-2,500.

-kwag
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  #3  
11-30-2002, 02:21 PM
snowmoon snowmoon is offline
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but still, shoudn't the predictor stop at 100 and give up? Or mabye it can start raising the minimum if 100 is hit without exceppding the prediction size?
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11-30-2002, 06:20 PM
kwag kwag is offline
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Quote:
Originally Posted by snowmoon
but still, shoudn't the predictor stop at 100 and give up? Or mabye it can start raising the minimum if 100 is hit without exceppding the prediction size?
I think this is a bug in DVD2SVCD because TMPEG doesn't encode values above 100. So DVD2SVCD should just stop at 100 and start encoding, but it just goes bezerk

-kwag
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