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--- uhd_hd_stat_mux [2018/12/09 19:56] – walkeradmin
+++ uhd_hd_stat_mux [2023/03/09 22:35] (current) – external edit 127.0.0.1
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 ==== Introduction ====
-When using the <color #ed1c24>MFSP</color> as the <color #ed1c24>Stat Mux controller</color>, if you have the same resolution for all services, then by 'scale' they will get the same bit rate in term of weighting (complexity will determine the actual rates of the services).
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+When using the <color #ed1c24>MFSP</color> as the <color #ed1c24>Stat Mux controller</color>, if you have the same resolution for all services, then by 'scale' they will get the same bit rate in terms of weighting (complexity will determine the actual rates of the services).
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-When you have a mixed Stat Mux configuration (in terms of mixed resolutions) specifically in terms of HD/UHD then you might find that the UHD is starved of bits (depending on the content).
+When you have a mixed Stat Mux configuration (in terms of mixed resolutions) specifically in terms of HD/UHD then you might find that the UHD is starved of bits (depending on the HD/UHD content mix).
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-There is an Advanced Parameter in the MFSP that allows some control of the Stat n) Mux distribution (by resolution) that we can use to balance things up.
+There is an Advanced Parameter in the MFSP that allows some control of the Stat Mux distribution (by resolution) that we can use to balance things up. This is not service specific, so any changes will affect all services.
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+----
 ==== Advanced Parameter ====
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 So the UHD will get 2.82 more bits if the value is the default '1'
 </file>
-For my example of 2xHD 1xUHD, I had to set the <color #ed1c24>statmux.SurfaceAdjust</color> to <color #ed1c24>8</color>. The UHD did not actually get 8*More bits, so there so more to this that I have been told. But at least increasing the value for <color #ed1c24>statmux.SurfaceAdjust</color> increases the rate that the UHD gets.
+For my example of 2xHD 1xUHD, I had to set the <color #ed1c24>statmux.SurfaceAdjust</color> to <color #ed1c24>8</color>. The UHD did not actually get <color #ed1c24>8 x More bits</color>, so there so more to this than I am aware. But at least increasing the value for <color #ed1c24>statmux.SurfaceAdjust</color> increases the rate that the UHD gets.
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-The UHD did manage a much higher average bit rate, going up to 34Mb/s for longer periods.
+After changing the Advanced Parameter <color #ed1c24>statmux.SurfaceAdjust</color> to <color #ed1c24>8</color>, the UHD did manage a much higher average bit rate, going up to 34Mb/s for longer periods.
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-In the second test we had 4xDrama and 1xUHD Sport. In this example the UHD was taking 32-38Mb/s for a lot of the time, and really stealing all of the bits from the 4 x HD (Drama) content, so my original value of 8 needed dialling back a little for this scenario.
+In the second test we had 4 x Drama and 1 x UHD Sport. In this example the UHD was taking 32-38Mb/s for a lot of the time, and really stealing all of the bits from the 4 x HD (Drama) content, so my original value of 8 needed dialling back a little for this scenario.
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+----
+==== Advanced Parameter Location ====
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 The Advanced Parameter lives in the MFSP in the following location:
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-/etc/opt/ericsson/stream-processing-statmux/smxMasterIni.json
+    /etc/opt/ericsson/stream-processing-statmux/
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+The file that needs to be edited is called:
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+    smxMasterIni.json
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-Edit the  mpeg4.cfg location exactly as below:
+Edit the  mpeg4.cfg location exactly as below: (The line we have added is <color #ed1c24>"statmux.SurfaceAdjust" : <Value>,</color>)
 <file>
     "mpeg4.cfg" : {
@@ Line 67: / Line 82: @@
     }
 </file>
+Remember, this is a json file, so Syntax is super important.
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