Quantcast Encoding: Best Bitrate and CQ Values? - digitalFAQ.com Forums [Archives]
  #1  
06-30-2003, 01:02 PM
dredj dredj is offline
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Hello Gurus,

I just want to ask which of this setting do you think will result best: (my source is a good VHS children's movies, and encoding at 352x240.

1. Min BR --> 1000
Max BR --> 2500
CQ --> 82

2. MinBR -->300
MAX BR --> 2500
CQ -->83

3. MinBR --> 2000
MAXBR --> 2500
CQ -->20

Thanks,
Dredj
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  #2  
06-30-2003, 01:28 PM
dredj dredj is offline
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And one more:

MinBR- 1200
MaxBR - 2500
CQ- 80.710
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  #3  
06-30-2003, 01:40 PM
dazedconfused dazedconfused is offline
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Well, I wouldn't consider myself a "guru" by any stretch of the imagination , but I'm fairly certain your #2 scenario would give the best results out of the 3 you listed. Using the lowest possible minimum bitrate that will play properly on your dvd player would allow more kbps for higher-action scenes that actually need it, giving you an overall better picture. This way, you're not wasting precious bitrate on scenes that don't need it.

Overall though, I think the best thing you could do for better quality (depending on the length of the movie and if it's widescreen or fullscreen) is probably to use a higher resolution than 352x240 (if your dvd player supports higher resolutions), even if it means a drop in CQ level. I've done encodes with 704x480 (CQ in high 50s) and 544x480 (CQ as low as ~54) resolutions, and they still gave quite acceptable (if not "good") quality. Quality is subjective though so your opinion of "general minimum acceptable CQ levels at certain resolutions" may differ from mine. You'd be surprised...with some sources, you can get away with dropping CQ pretty darn low and it will still look pretty good/acceptable...much better than using a lower resolution with a higher CQ.

Good luck,
-d&c
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06-30-2003, 02:02 PM
dredj dredj is offline
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thanks d&c, well the reason why I am staying away of the high resolution or basically 480 lines(for all my VHS capture through DV Cam passthrough and also using capture card) is because if I use this, the output of my video contains combing effect (as I posted on "my first KVCD"), Kwag told me to try IVTC, and I tried...but the the movie becomes jumpy, I also tried FieldDeinterlace and the movie result is still jumpy, hence I'm stuck on using 240 lines.

Thanks for the reply...i just want to know if increasing the minbitrate will have better result or not.

Dredj
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