yes, this happens because 50mbit/sec is not correct
a max framesize of 208541 results in a bit rate of max
49.999840 mbit/sec, IIUC thats what the spec means by 50mbit/sec
The spec actually says "Up to 50Mb/s" and "Up to 208541" that being the
highest value that comes out below the the 50Mb/s. So I tend to agree
with Michael.
Hi, i have made a short excel calulation and I think that these
settings/syntaxes should be the correct ones for PAL/NTSC D-10:
Do you agree?
minrate
framerate max coded bits/byte bufsize
maxrate
framesize (Bytes)
rc_init_occupancy video bitrate
IMX50 PAL 25 250000 8 2000000
50000000
IMX40 PAL 25 200000 8 1600000
40000000
IMX30 PAL 25 150000 8 1200000
30000000
IMX50 NTSC 29,97003 208541 8 1668328
49999840,16
IMX40 NTSC 29,97003 166833 8 1334664
39999920,08
IMX30 NTSC 29,97003 125125 8 1001000
30000000
Syntaxes:
PAL
IMX50 16bit 8ch
-map 0:v -map 0:a -c:v mpeg2video -s 720x608 -r 25 -pix_fmt yuv422p
-aspect 4:3 -minrate 50000000 -maxrate 50000000 -b:v 50000000 -g 1
-flags +ildct+ilme+low_delay -intra_vlc 1 -non_linear_quant 1 -ps 1
-qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 2000000 -rc_init_occupancy
2000000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s16le -ar 48000 -ac
8 -f mxf_d10 -timecode 12:34:56:11
IMX40 16bit 8ch
-map 0:v -map 0:a -c:v mpeg2video -s 720x608 -r 25 -pix_fmt yuv422p
-aspect 4:3 -minrate 40000000 -maxrate 40000000 -b:v 40000000 -g 1
-flags +ildct+ilme+low_delay -intra_vlc 1 -non_linear_quant 1 -ps 1
-qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 1600000 -rc_init_occupancy
1600000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s16le -ar 48000 -ac
8 -f mxf_d10 -timecode 12:34:56:11
IMX30 16bit 8ch
-map 0:v -map 0:a -c:v mpeg2video -s 720x608 -r 25 -pix_fmt yuv422p
-aspect 4:3 -minrate 30000000 -maxrate 30000000 -b:v 30000000 -g 1
-flags +ildct+ilme+low_delay -intra_vlc 1 -non_linear_quant 1 -ps 1
-qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 1200000 -rc_init_occupancy
1200000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s16le -ar 48000 -ac
8 -f mxf_d10 -timecode 12:34:56:11
---------------------------------------------------
NTSC
IMX50 16bit 8ch
-map 0:v -map 0:a -c:v mpeg2video -s 720x512 -r 30000/1001 -pix_fmt
yuv422p -aspect 4:3 -minrate 49999840 -maxrate 49999840 -b:v 49999840 -g
1 -flags +ildct+ilme+low_delay -intra_vlc 1 -non_linear_quant 1 -ps 1
-qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 1668328 -rc_init_occupancy
1668328 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s16le -ar 48000 -ac
8 -f mxf_d10 -timecode 12:34:56:11
IMX40 16bit 8ch
-map 0:v -map 0:a -c:v mpeg2video -s 720x512 -r 30000/1001 -pix_fmt
yuv422p -aspect 4:3 -minrate 39999920 -maxrate 39999920 -b:v 39999920 -g
1 -flags +ildct+ilme+low_delay -intra_vlc 1 -non_linear_quant 1 -ps 1
-qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 1334664 -rc_init_occupancy
1334664 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s16le -ar 48000 -ac
8 -f mxf_d10 -timecode 12:34:56:11
IMX30 16bit 8ch
-map 0:v -map 0:a -c:v mpeg2video -s 720x512 -r 30000/1001 -pix_fmt
yuv422p -aspect 4:3 -minrate 30000000 -maxrate 30000000 -b:v 30000000 -g
1 -flags +ildct+ilme+low_delay -intra_vlc 1 -non_linear_quant 1 -ps 1
-qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 1001000 -rc_init_occupancy
1001000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s16le -ar 48000 -ac
8 -f mxf_d10 -timecode 12:34:56:11
Best Regards
Christoph
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