Changes between Version 57 and Version 58 of Encodings
- Timestamp:
- 01/12/17 11:51:52 (5 years ago)
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Encodings
v57 v58 1 1 [[Image(http://xpra.org/icons/encoding.png)]] 2 2 = Picture Encodings = 3 4 This page is strongly related to [/wiki/WindowRefresh WindowRefresh], the [/wiki/Network Network] and [/wiki/ClientRendering client rendering] are also relevant.[[BR]]5 For video encodings ([/wiki/Encodings/vpx vpx] and h264), [/wiki/CSC colorspace conversion] is also required reading.6 3 7 4 [[BR]] … … 28 25 }}} 29 26 27 30 28 {{{#!div class="box" 31 29 == Choosing an Encoding == … … 49 47 50 48 {{{#!div class="box" 51 == [/wiki/CSC Colourspace conversion step - CSC]==49 == Related Links == 52 50 53 Before sending the pixels to the video encoder, xpra may need to first call a colourspace conversion step, (some newer versions of x264 support {{{BGRA}}} pixels as input directly) it is also required when downscaling the video. 51 This page is related to [/wiki/WindowRefresh WindowRefresh], the [/wiki/Network Network] and [/wiki/ClientRendering client rendering] are also relevant for understanding the end to end pixel transmission process.[[BR]] 54 52 55 See: [/wiki/CSC Colourspace conversion step - CSC] 53 For video encodings, see [/wiki/Encodings/vpx vpx] and h264. 54 55 Before sending the pixels to the video encoder, xpra may need to first call a colourspace conversion step, (some newer versions of x264 support {{{BGRA}}} pixels as input directly) it is also required when downscaling the video. See: [/wiki/CSC Colourspace conversion step - CSC] 56 56 }}} 57 57 … … 60 60 == Tuning == 61 61 The best way to choose the right option is through [/wiki/Testing]. 62 62 63 Though you may find some [http://alax.info/blog/1394 good illustrations] online to give you an idea of the trade offs. 63 64 (ie: [http://blog.malayter.com/2010/12/presets-versus-quality-in-x264-encoding.html fps vs noise], [http://blogs.motokado.com/yoshi/2011/06/25/comparison-of-x264-presets/ fps vs size]) 64 65 Be aware that the lossless auto-refresh will trigger a lossless frame encoded using png or rgb. If the delay is too low, it may negate the benefits of using efficient compression. 66 We have collected some [/wiki/Encodings/Statistics encoding statistics] with an older version. 65 67 66 68 === Notes ===