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TMS320DM8148: dm8148, JPEG Extended error 20000

Part Number: TMS320DM8148

hello TI-friends,

I use DM8148, IPNC RDK3.8 to encode 480P yuv420 data to jpeg.

When the input image gain is high,the JPEG encode failed with message "JPEG Extended error 20000 ".

 [m3video] 52151747:!ERROR!:ENCLINK::links_m3video/iva_enc/encLink_jpeg.c:[193]::INTERNAL ERROR:-1
 [m3video] ALGPROCESS FAILED
 [m3video] JPEG Extended error 20000
 [m3video] 52151747:WARN
 [m3video] ENCLINK:ERROR in Enclink_JPEGEncodeFrame.Status[-1]
 [m3video] 52151747:WARN
 [m3video] ENC : IVAHDID : 0 ENCLINK:ERROR in EncLink_SubmitBatch.Status[-1]

And I have checked MJPEG_Encoder_HDVICP2_UserGuide.pdf under REL.500.V.MJPEG.E.IVAHD.01.00.04.00\500.V.MJPEG.E.IVAHD.01.00\IVAHD_001\docs

,and got the following

17
IJPEGVENC_ERR_INVALID_MBOX_MESSAGE
Invalid MailBox Message has been received
This error will occur only when number of mail box messages from HDVICP2 to Media Controller exceeds (232 - 1).

I do not know why?