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SVCD : capture formats

Here are alternatives for video capture settings I was thinking:

Resolution: PAL (NTSC) Chroma Comment
480x576 (480x480) 4:2:2 (YUY2) SVCD format
720x576 (720x480) 4:2:2 (YUY2) SVCD x 1.5 and DVD format
768x576 (768x480) 4:2:2 (YUY2) Maximum and 32 multiple
Codec Tuning Comment
Huffyuv Fastest Best quality, from 300 to 500MB/minute
PICVideo 20, 18, 16 Better compression (smooth picture)
Indeo 5.11 100, 85, 70, 50 Excellent compression (keeps the details)
DivX (MPEG-4)   Extreme compression

I tried to capture with 4:2:0 chroma with I420 setting but PCTV can only capture YUY2 (4:2:2) and RGB. Native format YUY2 is preferred.

Here are alternative for video capture settings (audio is PCM 44.1KHz 16 bits stereo, numbers for 1 minute film, 25 frames per second, no drop frame, capture done with my Dell Computer 4100):

Codec Setting Resolution CPU usage Video rate (KB/s) Compression For 1 minute For 1GB Comment
Huffyuv Fastest 480x576 70 % 6,523 K/s 2.1 : 1 372 MB 2:40 Perfect quality
Huffyuv Fastest 720x576 95 % 8,170 K/s 2.5 : 1 488 MB 2:03 Perfect quality
Huffyuv Fastest 768x576 100% 8,155 K/s 2.7 : 1 486 MB 2:03 Perfect quality
PICVideo 18 480x576 60 % 1,145 K/s 11.8 : 1 76 MB 13:09 Good quality (*)
PICVideo 18 720x576 90 % 1,351 K/s 15.0 : 1 90 MB 11:06 Good quality
PICVideo 18 768x576 93 % 1,299 K/s 16.6 : 1 86 MB 11:37 Good Quality
PICVideo 16 480x576 50 % 629 K/s 21.5 : 1 48 MB 20:50 Quality acceptable (**)
PICVideo 16 720x576 82 % 735 K/s 27.6 : 1 54 MB 18:31 Quality acceptable (**)
PICVideo 16 768x576 85 % 735 K/s 29.4 : 1 54 MB 18:31 Quality acceptable (**)
DivX LM (***) 480x576 100 % 600 K/s 22.5 : 1 46 MB 21:44 Quality acceptable
MPEG-4 8s (****) 480x576 100 % 408 K/s 33.2 : 1 34 MB 29:24 Quality acceptable
MPEG-4 1s (****) 480x576 100 % 408 K/s 33.2 : 1 34 MB 29:24 Quality acceptable
MPEG-4 8s (****) 720x576 100 % 405 K/s 50.1 : 1 34 MB 29:24 Quality acceptable

(*) sometimes PICVideo provides with a corrupted AVI file which means to remake the capture.
(**) artefacts are visible on stills but movie quality is correct.
(***) Low Motion, key frame every 10 seconds, crisp 80, 6Mbps and I was unable to capture higher resolution without drop frames.
(****) Microsoft MPEG-4 V3 codec, key frame every 8 seconds or 1 second, crisp 75, 3Mbps (can be captured with Windows Media Encoder 7 to ASF or WMV file). I was not able to capture at higher resolution without drop frames. At 720x576, buffering was much required.

I was absolutely unable to capture with Indeo 5.11 (maybe because interlaced signal). Please note that DivX and MPEG-4 codecs should not be used fro capture because their require too much CPU power and key frames, which are very distant, could be a trouble when editing video.

After encoding with TMPGEnc beta12a (default SVCD template), all clips are good quality, better than VCD. Picture got too much brightness and "jumpy" when a lot of motion when seen on TV set with Philips DVD-950. On PC, display is correct but interlacing is visible. The only clip with good brightness and no "jumpy" on TV set was the one capture with Huffyuv 480x576.

What we can state now is :

  1. resizing to 480x576 (480x480 for NTSC) must be done before encoding (VirtualDUB resize with precise bilinear is appropriate filter),
  2. quality is much better than VCD (no square artefacts),
  3. all codec settings for capture are acceptable (difficult to see difference).

So I've summarized capture settings for SVCD in the following table:

Codec Setting Resolution Video rate (KB/s) Compression For 1 minute For 1GB Comment
Huffyuv Fastest 480x576 6,523 K/s 2.1 : 1 372 MB 2:40 Preferred
PICVideo 18 480x576 1,145 K/s 11.8 : 1 76 MB 13:09 The best if compression is necessary
PICVideo 18 720x576 1,351 K/s 15.0 : 1 90 MB 11:06 Common format for SVCD and miniDVD
PICVideo 18 768x576 1,299 K/s 16.6 : 1 86 MB 11:37 Common format for SVCD and PC
PICVideo 16 480x576 629 K/s 21.5 : 1 48 MB 20:50 Preferred if higher compression needed
MPEG-4 8s 480x576 408 K/s 33.2 : 1 34 MB 29:24 For maximum compression

 

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Version of the document: 1.0EN
Created: March 9 - 2001
Updated: March 14 - 2001
Author: Leon