cisco
Decoder picture queue ran out of space
When I test an use case of playback received frames on my target from remote rtsp streaming server, the decoder picture queue ran out of space. The error is below Error:DecodeCurrentAccessUnit()::::::PrefetchPic ERROR, pSps->iNumRefFrames:4. Info:ResetDecoder(), context error code is 16384
static inline int32_t GetTargetRefListSize (PWelsDecoderContext pCtx) { ... } else { iNumRefFrames = pCtx->pSps->iNumRefFrames + 2; ...
In my test case, the iNumRefFrames =4, so the queue size is 6.
There is a comment in WelsRequestMem() saying that the queue size will be pSps->iNumRefFrames x 2.
iPicQueueSize = GetTargetRefListSize (pCtx); // adaptive size of picture queue, = (pSps->iNumRefFrames x 2)
I increased the queue size with the formula pCtx->pSps->iNumRefFrames * 2, the queue size is 8 in my case and the issue disappeared .
So the comment and actual code does not match. Should we use pCtx->pSps->iNumRefFrames * 2? Or can we increase the buffer size like iNumRefFrames = pCtx->pSps->iNumRefFrames + 4;
I am using QNX in my test target. h264 version is 2.4.1.
If you could provide sample video which can reproduce the issue, it would help.
I used this sample video https://dvdloc8.com/clip.php?movieid=12167&clipid=3
I tried iNumRefFrames = pCtx->pSps->iNumRefFrames + 4; It solved the issue as well.
Not sure I understand your question. It is not fixed time. Most of time is around 10 seconds.
Error:DecodeCurrentAccessUnit()::::::PrefetchPic ERROR, pSps->iNumRefFrames:4. Info:ResetDecoder(), context error code is 16384
Thanks for the information. I could reproduce the issue with openh264 v2.4.1, however, could not with v2.5.0, or later. i.e. the issue was already fixed.
I am still seeing the issue with 2.6.0 if I do not increase the picture queue size. my platform is raspberryPi-4.
What kind of player are you using? I tested with ffplay and mpv but the issue could not be reproduced. Does libopenh264 run in QNX via some player?