[FFmpeg-user] XDCAMHD422 Syntax questions - qmin qmax

[Christoph Gerstbauer]

Hello , just to be shure with the videoencoding options for XDCAMHD422. Is
this syntax correct or wrong or is anything important missing?

-c:v mpeg2video                                    - set videocodec mpeg2
(same as IMX50)
-r 25                                              - framerate 25 for PAL,
29.97 for NTSC
-pix_fmt yuv422p                                   - set pixel format,
yuv422 8bit
-s 1920x1080                                       - sets Full-HD resolution
-aspect 16:9                                       - aspect ratio always
16:9
-minrate 50000k                                    - set min video bitrate
(to force CBR 50Mbit)
-maxrate 50000k                                    - set max video bitrate
(to force CBR 50Mbit)
-b:v 50000k                                       - set video bitrate (to
force CBR 50Mbit)
-g 12                                              - set GOP size: 12 for
PAL, 15 for NTSC
-flags +ildct+ilme                                 - ildct=Use interlaced
DCT / ilme = Apply interlaced motion estimation
-intra_vlc 1                                       - intra_vlc_format,
Intrac VLC table 1 (can also be 0), used for encoding decoding DCT
coefficients
-dc 10                                             - sets Intra DC
precision. 10 means DC range allowed 0...1023, 8 means 0...255
-non_linear_quant 1                                - only used for MPEG2.
"quantisation scale type", 1 or 0
-bf 2                                              - Set max number of B
frames between non-B-frames.
-qmin 1                                            - Set min video
quantizer scale (VBR). Must be included between -1 and 69, default value is
2
-qmax 12                                           - Set max video
quantizer scale (VBR). Must be included between -1 and 1024, default value
is 31.
-top 1                                             - set field order tff
-bufsize 17825792                                  - set video buffer size
-rc_init_occupancy 17825792                        - Set number of bits
which should be loaded into the rc buffer before decoding starts.
-rc_min_vbv_use 1 -rc_max_vbv_use 1
-sc_threshold 1000000000                           - Set scene change
threshold
-lmin "1*QP2LAMBDA"                                - Set min lagrange
factor (VBR)
-vtag xd5c                                         - Force video
tag/fourcc. This is an alias for -tag:v

Best Regards
Christoph Gerstbauer