experiment:encoding-quality

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experiment:encoding-quality [2021/01/02 16:21] – ischluffexperiment:encoding-quality [2021/04/15 13:36] (current) – ischluff
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 ====== Encoding-Quality-Testing ====== ====== Encoding-Quality-Testing ======
-Created with the [[https://bitbucket.fem.tu-ilmenau.de/projects/BROADCAST/repos/vmaf-docker/browse|vmaf-docker]] repo.+Created with the [[https://github.com/voc/voctoquality|voctoquality]] repo.
  
 ===== Reference content ===== ===== Reference content =====
 Reference content is either our own (https://media.ccc.de) or from Xiph (https://media.xiph.org/video/derf/). Reference content is either our own (https://media.ccc.de) or from Xiph (https://media.xiph.org/video/derf/).
  
-The specific sources are found in https://github.com/voc/vmaf-docker/blob/master/data/sources.json+The specific sources are found in https://github.com/voc/voctoquality/blob/master/data/sources.json
  
 All the reference content is converted to 8bit 1080p25. All the reference content is converted to 8bit 1080p25.
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 The codec settings are the ones currently in use by the C3VOC for live streaming. The codec settings are the ones currently in use by the C3VOC for live streaming.
  
-See https://github.com/voc/vmaf-docker/blob/master/data/libquality/profiles/voc_streaming.py for the specific ffmpeg options.+See https://github.com/voc/voctoquality/blob/master/data/profiles/voc_streaming.py for the specific ffmpeg options.
  
 The codecs are tested with bitrates from 1Mbit/s to 5.2Mbit/s. The codecs are tested with bitrates from 1Mbit/s to 5.2Mbit/s.
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 ==== Comments ==== ==== Comments ====
  
-^ Platform                                         ^ Label        ^ Hardware Codecs    ^ Comments                                                                                                                                            ^ +^ Platform                                         ^ Label        ^ Hardware Codecs    ^ Comments                                                                                                                                                        ^ 
-^ Intel 6th Gen (i7-6600U)                         | skylake      | h.264, h.265       | h.264 scores better than our VP9 and x264 streaming settings and is pretty fast\\ h.265 even scores a little bit higher but is considerably slower  | +^ Intel 6th Gen (i7-6600U)                         | skylake      | h.264, h.265       | h.264 scores better than our VP9 and x264 streaming settings and is pretty fast\\ h.265 even scores a little bit higher but is considerably slower              | 
-^ Intel 8th Gen (i7-8665U)                         | whiskeylake  | h.264, h.265, VP9  | h.264 and h.265 results are identical to skylake\\ VP9 scores worse than H.264 and has broken rate-control for <2mbit/s                             | +^ Intel 8th Gen (i7-8665U)                         | whiskeylake  | h.264, h.265, VP9  | h.264 and h.265 results worse but faster than skylake, have to check whats up with that\\ VP9 scores worse than H.264 and has broken rate-control for <2mbit/s  | 
-^ AMD Navi (RX 5700 XT) + Ryzen 2nd Gen (R5-2600)  | navi10       | h.264, h.265       | h.264 is worse than x264 on veryfast...\\ h.265 produces 1920x1088 output?                                                                          |+^ AMD Navi (RX 5700 XT) + Ryzen 2nd Gen (R5-2600)  | navi10       | h.264, h.265       | h.264 is worse than x264 on veryfast...\\ h.265 produces 1920x1088 output?                                                                                      | 
 +^ Nvidia Turing (RTX2080 Super)                    | turing       | h.264, h.265       | nvidia-driver-460, cuda-toolkit 9.1.85\\ best h.265 encode, h.264 behind Intel                                                                                  |
  
  
 ==== Finding a Tracker VP9 Profile ==== ==== Finding a Tracker VP9 Profile ====
 +=== HD-Profile ===
  
 Goals:  Goals: 
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 Notes: Notes:
   * realtime + speed <= 3: slower and worse than quality good   * realtime + speed <= 3: slower and worse than quality good
 +
 +```
 +-i $ref
 +-c:v libvpx-vp9
 +-quality:v good
 +-crf:v 30
 +-b:v 6000k
 +-maxrate:v 8000k
 +-minrate:v 2000k
 +-row-mt 1
 +-frame-parallel:v 1 -tile-columns:v 2
 +```
 +
 +=== SD-Profile ===
 +  * worse parallelization and therefore speed than HD-profile
 +  * worse rate-control than HD-profile (doesn't reach target bitrate)
 +  * bufsize doesn't change anything
 +  * no threads parallelizes best
 +  * frame-parallel doesn't work (frame too small?)
 +  * bitrate with crf is more like maxrate
  
  
  • experiment/encoding-quality.1609600864.txt.gz
  • Last modified: 2021/01/02 16:21
  • by ischluff