config
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################################ Command File ################################# The encoder supports input commands simulating dynamic events like: - Scene Change notification - Key frame insertion - Changing the Gop Length - Changing the target Bit-Rate - Using Long Term reference Picture - Changing the Number of BFrames - Changing the Frame-rate This feature is enabled when a command file is provided.(CmdFile in [INPUT] section) Each line of the file defines one frame identifier followed by one or more commands applying to this frame. Syntax : <Frame number>: <command> [, <command>] Where <command> can be one of the following: SC ----> Scene Change KF ----> KeyFrame (restarting new GOP) LT ----> Use Frmae as long term reference picture UseLT ----> Use long term reference picture to encode GopLen=<length> ----> Change the Gop length NumB=<numB> ----> Change the number of consecutive B-Frame BR=<Kbits/s> ----> Change the target bit Rate Fps=<frames/s> ----> Change the Frame rate ################################## ROI File ################################### The encoder supports setting Region Of Interest and the frame at which the ROI(s) should apply. This feature is enabled by using QpCtrlMode = ROI_QP in [SETTINGS] section and a ROI file is provided to specify region quality.(RoiFile in [INPUT] section) The ROI definition starts with a line specifying the frame identifier, the background quality, and an ROI order (in case of overlapping regions), followed by one or more lines each defining a ROI for this frame and the following frames until the next ROI definition. The encoder supports setting one or several Region Of Interest(s). Syntax : frame <index> : [BkgQuality=<quality>, Order=<order>] <posX>:<posY>, <width>x<height>, <quality> <posX>:<posY>, <width>x<height>, <quality> ... Where: <posX>, <posY>, <width> and <height> are in pixel unit. They are then automatically rounded to the bounding CTB units. <quality> can be, HIGH_QUALITY ----> Higher quality than rate-control given value MEDIUM_QUALITY ----> Same quality as rate-control given value LOW_QUALITY ----> Lower quality than rate-control given value NO_QUALITY ----> Worse possible quality for region STATIC_QUALITY ----> Region with static content (i.e; exactly same content as in the reference picture) <order> can be, QUALITY_ORDER ----> Use quality of region having the best quality INCOMING_ORDER ----> Use quality of the latest defined region Note: To specify only one ROI for the full sequence, use "frame ALL:" ################################### QP File ################################### QPs of each CTB can be provided to encoder from an external buffer loaded from a file. The file shall be named "QPs.hex" and located in the working directory. The QP table modes are enabled by using "QPCtrlMode = LOAD_QP" or "QPCtrlMode = LOAD_QP | RELATIVE_QP." For AVC, there is one byte per 16x16 MB (in raster scan format): absolute QP in [0;51] or relative QP in [-32;31]. For HEVC, there is one byte per 32x32 CTB (in raster scan format): absolute QP in [0;51] or relative QP in [-32;31]. Note : only the 6 LSBs of each byte are used for QP, the 2 MSBs are reserved. For example, to specify the following relative QP table, ------------------------------------------------------------------------------------------------- | -1 | -2 | 0 | 1 | 1 | 4 | ------------------------------------------------------------------------------------------------- | -4 | -1 | 1 | 2 | 2 | 1 | ------------------------------------------------------------------------------------------------- | -1 | 0 | -1 | 1 | 1 | 4 | ------------------------------------------------------------------------------------------------- | 0 | 0 | -2 | 2 | 2 | 6 | ------------------------------------------------------------------------------------------------- | 1 | -2 | 0 | 1 | 4 | 2 | ------------------------------------------------------------------------------------------------- The QPs.hex file for HEVC should be like: 3F 3E 00 01 01 04 3C 3F .. .. .. Note: Table size depends on resolution. Note the QPs.hex sample file corresponds to a given resolution.