Mpeg2 Decoder on Neatra board ,DM816x, seems to skip frames and does not exits from the IL_Client apps cleanly for ezsdk_5_03_01_15.

Hi,

There is a bug in the parser code in the IL-Clients due to which it incorrectly parses the frames. The frame skips and errors are due to this. This will be fixed in the next SDK release. However, you can make the following changes in the file \decode\srcdecode_utils.c: function Decode_GetNextMpeg2FrameSize and see if it works for you-

1. Line 678:  change from

      for (i = start_i; i < end_i; i ++)

to

      for (i = start_i; i < end_i-3; i ++)

2. Line 711: change from

        memset (&buff[i], ctx->idx, 0);

to

        memset (&buff[i], 0, ctx->idx);

3. Line 723: change from

        start_i = end_i;

to

        start_i = end_i-3;

Regards,

Anirban

Hi Anirban,

I changed accordingly as mentioned by you.

But still I do see the same issue (corrupted bit stream for some frames and frames skip and no clean exit).

root@dm816x-evm:~# ./decode_a8host_debug.xv5T -i 720x576_vlc.m2v  -w 720 -h 576
-o out.yuv -c mpeg2
input file: 720x576_vlc.m2v
width: 720
height: 576
output_file: out.yuv
codec: mpeg2
Decoder example
===============================
UIAClient is ready to send a UIA configuration command
UIAClient received UIA_CONFIGURE_ACK
UIAClient is done sending requests
Iteration 0 - Start
 allocating field buffer
 calling getHandle
Output port buffer size: 663552
 state IDLE
  state execute
  etb / ftb done
 Component generated error; OMX error ID = 0x8000100b
 frame 1  decoded
 frame 1  displayed
 frame 2  displayed
 frame 3  displayed
 frame 4  displayed
 frame 2  decoded
 frame 3  decoded
 frame 4  decoded
 frame 5  decoded
 frame 5  displayed
 frame 6  displayed
 frame 7  displayed
 frame 8  displayed
 frame 6  decoded
 frame 7  decoded
 frame 8  decoded
 frame 9  decoded
 frame 9  displayed
Component generated error; OMX error ID = 0x8000100b
Component generated error; OMX error ID = 0x8000100b
 frame 10  displayed
 frame 11  displayed
 frame 12  displayed
 frame 10  decoded
 frame 11  decoded
 frame 12  decoded
 frame 13  decoded
 frame 13  displayed
 frame 14  displayed
 frame 15  displayed
 frame 16  displayed

No more to read
 frame 14  decoded
Tearing down the decode example
Error OMX_ErrorUndefined:    WaitForState has timed out
Decoder Test End

Thanks

Pujari