View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000019 | JVT JM H.264/AVC reference software | encoder | public | 2006-10-16 23:36 | 2006-10-20 21:02 |
| Reporter | goldchan | Assigned To | Alexis Michael Tourapis | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Product Version | JM 11.0 | ||||
| Fixed in Version | JM 12.0 | ||||
| Summary | 0000019: B slice with full Hierarchical Coding | ||||
| Description | Dear Expert, When I set the "HierarchicalCoding=2", every 30,62,94 and 126 have the same bit rate as the first I frame's rate nevertheless different sequences and QPs. If I don't use Hierarchical Coding mode, It doesn't happen. GOP length is (1P+7B) with open GOP. Thses frames are coded as P->B->B,B->B,B,B,B. I attached my config file and output stat_frame.dat file. | ||||
| Tags | No tags attached. | ||||
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2006-10-16 23:36
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I used the following command for encoding lencod -f encoderForemanQCIF.cfg -p SliceMode=0 -p SliceArgument=1 -p QPISlice=10 -p QPPSlice=10 -p QPBSlice=10 |
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There seems to be no problem with current config file. Please also send "encoder.cfg" and be more clear on what exactly is the problem. Note that using -p QPPSlice=10 -p QPBSlice=10 also results in different (and as expected) QPs assigned to P and B slices (depending on hierarchy level). PS. Make sure that Rate Control is disabled in your simulations since that is not supported for hierarchical coding. Also it is suggested that you try EPZS instead UMHex. |
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2006-10-19 18:49
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2006-10-19 18:50
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I modified my config file(encoderForemanQCIF.cfg) to use EPZS instead UMHex. I agreed to your comment since I set "HierarchyLevelQPEnable=1". And I double checked my config file and encoder.cfg not to use rate control. Because I specify my config file(encoderForemanQCIF.cfg), I don't know why you need encoder.cfg. Anyway, I attached both config files. I also checked this problem, after changing. It still has the same problem. |
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Hi, I am afraid that I still do not understand what problem you are having. The bits for each frame seem very different. Are you talking about bits or are you talking about something else that is being reported in the stat_frame.dat file? The problem with version 11.0 and that file was that some of those parameters were in int64 format and the incorrect format was used to write out these stats. That is why you are seeing many negative and weird values in the mode occurence. This was fixed in the latest "unofficial" version (it was just uploaded as JVT-U029). In any case, please do clarify what I should be looking at. As for encoder.cfg, do note that if you use the "-f" option, the encoder.cfg file is also parsed prior to any other files you may have. This results in some of the options that may only exist in encoder.cfg to be used from there. You could try the "-d" option instead. |
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Thanks for your comment. I mentioned bit rate at stat_frame.dat file. Where can I download JVT-U029? I can't find ftp3.itu.int web site. If I download the JVT-U029, I'll check it again. |
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Hi, I just confirmed and resolved the problem. The issue is report_frame_statistic(). Check the following (I will add this in an update of JVT-U029. Wait probably until monday for a revision which should have an "r1" option to it. Check this link http://ftp3.itu.ch/av-arch/jvt-site/2006_10_Hangzhou/). // Bug fix. Old code reports statistics of Intra for // every retention of frame_num to 0 //if (img->frame_num == 0) if (img->number == 0 && img->frame_num == 0) { bitcounter = (int) stats->bit_ctr_I; } else { bitcounter = (int) (stats->bit_ctr_n - last_bit_ctr_n); last_bit_ctr_n = stats->bit_ctr_n; } |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2006-10-16 23:36 | goldchan | New Issue | |
| 2006-10-16 23:36 | goldchan | File Added: config_stat.zip | |
| 2006-10-17 17:54 | goldchan | Note Added: 0000011 | |
| 2006-10-19 04:41 | Alexis Michael Tourapis | Status | new => assigned |
| 2006-10-19 04:41 | Alexis Michael Tourapis | Assigned To | => Alexis Michael Tourapis |
| 2006-10-19 04:45 | Alexis Michael Tourapis | Note Added: 0000013 | |
| 2006-10-19 18:49 | goldchan | File Added: encoder.cfg | |
| 2006-10-19 18:50 | goldchan | File Added: encoderForemanQCIF.cfg | |
| 2006-10-19 18:50 | goldchan | Note Added: 0000014 | |
| 2006-10-19 20:56 | Alexis Michael Tourapis | Note Added: 0000015 | |
| 2006-10-20 20:27 | goldchan | Note Added: 0000016 | |
| 2006-10-20 21:02 | Alexis Michael Tourapis | Status | assigned => resolved |
| 2006-10-20 21:02 | Alexis Michael Tourapis | Fixed in Version | => JM 11.0-devel |
| 2006-10-20 21:02 | Alexis Michael Tourapis | Resolution | open => fixed |
| 2006-10-20 21:02 | Alexis Michael Tourapis | Note Added: 0000017 |
