View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000281 | JVT JM H.264/AVC reference software | decoder | public | 2011-10-25 11:34 | 2011-10-26 23:49 |
| Reporter | eldesh | Assigned To | Karsten Suehring | ||
| Priority | high | Severity | crash | Reproducibility | always |
| Status | acknowledged | Resolution | open | ||
| Platform | x86(CYGWIN) | OS | Windows7(32bit) | OS Version | 6.1.7600 |
| Product Version | JM 18.0 | ||||
| Summary | 0000281: analysing 'buffering period SEI message' fail | ||||
| Description | if the decoder try to decoding particular H.264 stream then it crash :( The stream have a 'buffering_period' NAL unit and the NAL unit is stored in prior to nal_unit_type=1(NALU_SLICE) and nalu_unit_type=5(NALU_IDR). Additionally, when 'profile_idc' of the stream is equals to 118(Multiview High profile) or 128(Stereo High profile), the condition is met (and the decoding process crash). | ||||
| Steps To Reproduce | - make the stream that is described above - execute ldecod.exe - XD To making the stream with the JM-encoder (lencod.exe), you need to apply simple patches like below: >>> --- a/JM/lencod/src/image.c +++ b/JM/lencod/src/image.c @@ -3281,6 +3281,7 @@ void write_non_vcl_nalu_mvc( VideoParameters *p_Vid ) UpdateToneMapping(p_Vid->p_SEI); } (!!! this is a hack !!!) + init_sei(p_Vid->p_SEI); PrepareAggregationSEIMessage(p_Vid); p_Vid->p_Stats->bit_ctr_parametersets_n += bits = Write_SEI_NALU(p_Vid, 0); <<< and >>> --- a/JM/lencod/src/sei.c +++ b/JM/lencod/src/sei.c @@ -63,7 +63,7 @@ void init_sei(SEIParameters *p_SEI) p_SEI->seiHasRecoveryPoint_info=FALSE; p_SEI->seiHasRef_pic_buffer_management_repetition=FALSE; p_SEI->seiHasSpare_picture=FALSE; - p_SEI->seiHasBufferingPeriod_info=FALSE; + p_SEI->seiHasBufferingPeriod_info=TRUE; p_SEI->seiHasPicTiming_info=FALSE; p_SEI->seiHasSceneInformation=FALSE; p_SEI->seiHasSubseq_information=FALSE; <<< | ||||
| Additional Information | I upload files that includes the patched encoder source code(sei.c, image.c), encode.cfg and decode.cfg, these are used for analysing this issue. I think that accessing to '(p_Vid->)active_subset_sps' is wrong at blow code: >>> src/mbuffer.c:166 size /= pic_size; if(p_Vid->profile_idc == MVC_HIGH || p_Vid->profile_idc == STEREO_HIGH) { int num_views = p_Vid->active_subset_sps->num_views_minus1+1; size = imin(2*size, imax(1, RoundLog2(num_views))*16)/num_views; } else size = imin( size, 16); <<< the 'active_subset_sps' member is initialized only when decoding slices NALU_IDR, NALU_SLICE (and NALU_TYPE_DPA). | ||||
| Tags | No tags attached. | ||||
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The decoding loop is in general bad shape. A rewrite is planned which should hopefully take care of such issues. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2011-10-25 11:34 | eldesh | New Issue | |
| 2011-10-25 11:34 | eldesh | File Added: jm18_bug_env.tar.bz2 | |
| 2011-10-26 23:49 | Karsten Suehring | Note Added: 0000503 | |
| 2011-10-26 23:49 | Karsten Suehring | Assigned To | => Karsten Suehring |
| 2011-10-26 23:49 | Karsten Suehring | Status | new => acknowledged |
