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| -rw-r--r-- | DOCS/xml/en/encoding-guide.xml | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/DOCS/xml/en/encoding-guide.xml b/DOCS/xml/en/encoding-guide.xml index 452f64b88b..5b6c7685ab 100644 --- a/DOCS/xml/en/encoding-guide.xml +++ b/DOCS/xml/en/encoding-guide.xml @@ -3658,7 +3658,8 @@ random differences in the achieved bitrate. This is usually enough to be visible. </para> <para> - <option>subq=6</option> is the slowest, highest quality mode. + <option>subq=6</option> is slower and yields better quality at a reasonable + cost. In comparison to <option>subq=5</option>, it usually gains 0.1-0.4 dB global PSNR with speed costs varying from 25%-100%. Unlike other levels of <option>subq</option>, the behavior of @@ -3670,6 +3671,14 @@ random differences in the achieved bitrate. in low-motion scenes. Note that it is still recommended to always set <option>bframes</option> to something other than zero (see below). </para> + <para> + <option>subq=7</option> is the slowest, highest quality mode. + In comparison to <option>subq=6</option>, it usually gains 0.01-0.05 dB + global PSNR with speed costs varying from 15%-33%. + Since the tradeoff encoding time vs. quality is quite low, you should + only use it if you are after every bit saving and if encoding time is + not an issue. + </para> </listitem> <listitem> <para> |