From 1891a9a6f7ff6ebd4cc317dad43d784a688dc21f Mon Sep 17 00:00:00 2001 From: gpoirier Date: Sun, 25 Sep 2005 16:43:59 +0000 Subject: Adds encoding setting examples for lavc and XviD. Remove the references to constant quant in x264 section (Jeff did not like that :-) ). Put all examples in a table so that it they are easier to read. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@16597 b3059339-0415-0410-9bf9-f77b7e298cf2 --- DOCS/xml/en/encoding-guide.xml | 172 +++++++++++++++++++++++++++++++++++------ 1 file changed, 147 insertions(+), 25 deletions(-) (limited to 'DOCS/xml/en') diff --git a/DOCS/xml/en/encoding-guide.xml b/DOCS/xml/en/encoding-guide.xml index c1d87eb17b..193283d5e9 100644 --- a/DOCS/xml/en/encoding-guide.xml +++ b/DOCS/xml/en/encoding-guide.xml @@ -2507,6 +2507,62 @@ An example with AC3 compression: + +Encoding settings examples + + + The following settings are examples of different encoding + options combinations that affect the speed VS quality tradeoff + given the same target bitrate. + + + + All the encoding settings were tested on a 720x448 @30000/1001 fps + video sample, the target bitrate was 900kbps, and the machine was an + AMD-64 3400+ at 2400 Mhz in 64 bits mode. + Each encoding setting features the measured the encoding speed (in + frames per seconds) and the PSNR loss (in dB) compared to the "Very + high quality" setting. + Please understand that depending on your source, your machine type + and the development breakthrough, you may get very different results. + + + + + + +DescriptionEncoding optionsspeed (in fps)Relative PSNR loss (in dB) + + + + Very high quality + + 6fps + 0dB + + + High quality + + 15fps + -0.5dB + + + Fast + + 42fps + -0.74dB + + + Realtime + + 54fps + -1.21dB + + + + + + Custom inter/intra matrices @@ -3186,6 +3242,64 @@ codec + + +Encoding settings examples + + + The following settings are examples of different encoding + options combinations that affect the speed VS quality tradeoff + given the same target bitrate. + + + + All the encoding settings were tested on a 720x448 @30000/1001 fps + video sample, the target bitrate was 900kbps, and the machine was an + AMD-64 3400+ at 2400 Mhz in 64 bits mode. + Each encoding setting features the measured the encoding speed (in + frames per seconds) and the PSNR loss (in dB) compared to the "Very + high quality" setting. + Please understand that depending on your source, your machine type + and the development breakthrough, you may get very different results. + + + + + + +DescriptionEncoding optionsspeed (in fps)Relative PSNR loss (in dB) + + + + Very high quality + + 16fps + 0dB + + + High quality + + 18fps + -0.1dB + + + Fast + + 28fps + -0.69dB + + + Realtime + + 38fps + -1.48dB + + + + + + + @@ -3658,40 +3772,48 @@ codec The following settings are examples of different encoding options combinations that affect the speed VS quality tradeoff given the same target bitrate. - - If you are aiming at perfect quality without too much thinking and - no size limitation, a low constant quantizer encode (like with - ) with no B-frames - () will probably look very good, but - will needlessly spend lots of bits to encode details that could be - coded more wisely using some advanced settings. All the encoding settings were tested on a 720x448 @30000/1001 fps video sample, the target bitrate was 900kbps, and the machine was an AMD-64 3400+ at 2400 Mhz in 64 bits mode. - Each encoding setting is followed by the encoding speed (in frames - per seconds), the compression efficiency loss (in percent of bitrate) - compared to the "very high quality" setting, and the PSNR loss (in dB). - Please understand that depending on your source your machine type + Each encoding setting features the measured the encoding speed (in + frames per seconds) and the PSNR loss (in dB) compared to the "Very + high quality" setting. + Please understand that depending on your source, your machine type and the development breakthrough, you may get very different results. - -Very high quality: - -6fps, 0%, 0dB. - -High quality: - -13fps, -13%, -0.89dB. - -Fast: - -17fps, -20%, -1.48dB. - - + + + + +DescriptionEncoding optionsspeed (in fps)Relative PSNR loss (in dB) + + + + Very high quality + + 6fps + 0dB + + + High quality + + 13fps + -0.89dB + + + Fast + + 17fps + -1.48dB + + + + + -- cgit v1.2.3