VDEC Failure Due to Incorrect Input Streams

Symptom

If video decoding fails, the following exception information is recorded in the log. The log information varies according to the version.

Log message: Invalid width or height

[HiDvpp][A618] [Vfmw] vdec_drv_check_video_wh [Line]:127 device 0 chn 0 type(255) pic size(32x32) is out of range[128,128]x[4096,4096].

[ERROR] DVPP:2020-12-31-20:50:51.318.218 [VDEC][IsValidResolution:639][T56] Invalid width or height, valid range (w:128~4096) (h:128~4096), current width = 32, height = 32, realWidth = 18, realHeight = 18
[ERROR] DVPP:2020-12-31-20:50:51.318.365 [VDEC][upgrade_picture_info_in_detail:679][T56] check condition: ret == OMX_ErrorNone fail
[ERROR] DVPP:2020-12-31-20:50:51.318.429 [VDEC][EventHandLer:386][T56] Dynamic Resouces Unavailable now
[ERROR] DVPP:2020-12-31-20:50:51.368.106 [VDEC][hanlde_release_instance:1352][T56] wait Componment Exit Message Thread

Log message: bit_depth_luma(*) not equal *

[HiDvpp][A618] [Vfmw] process_sps [Line]:8994 bit_depth_luma(%d) not equal 8.
[HiDvpp][A618] [Vfmw] hevc_process_sps [Line]:1462 chn 0, bit_depth_luma(9) is not supported, hevc only support 8 or 10 bit depth.

[ERROR] DVPP(13757,dvpp_performance):2020-12-31-21:18:26.998.657 [VDEC][ProcessSPS:9055][T26] bit_depth_luma(10) not epual 8.
[ERROR] DVPP(13757,dvpp_performance):2020-12-31-21:18:26.998.763 [VDEC][ProcessSPS:9070][T26] bit_depth_chroma(10) not epual 8.

Possible Cause

According to the preceding log analysis, the input stream specifications may not meet the software and hardware restrictions.

Solution

Based on the VDEC functions and restrictions in "AscendCL API Reference > Media Data Processing V1" or "AscendCL API Reference > Media Data Processing V2" in CANN AscendCL Application Software Development Guide (C&C++), use a third-party tool (such as eseye u) to check whether the stream type, stream width, and stream height meet the requirements. If no, replace the stream as required.

Parent topic: JPEGD and VDEC