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27th October 2008, 14:45 | #1222 | Link |
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Serious Bug
Hi,
i've discovered and i want to signal a systematic (althoug random) bug wich happens on all Pure Black & White screens or Coda Titles. I discovered it first on Shining (in the Intermezzo BW Writing Titles) the on some movies at the final credits (bw). I post examples. Correct This happens starting from 994 (not included) to up (998 included). |
27th October 2008, 15:21 | #1224 | Link |
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Yes, obviously identical.
The only difference is that the last one (correct) is done with the 994. I can add that the corrupted pixel is not continous but it's flashing. Prev frame correct, next corrupted, next correct. Last edited by 3ngel; 27th October 2008 at 15:28. |
27th October 2008, 20:30 | #1227 | Link | |
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Quote:
And if 995 managed to cause a problem, then its GCC's fault, because the purpose of 995 was to add even more constraints to the inline assembler in the hope that GCC would stop breaking our code. |
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27th October 2008, 20:50 | #1229 | Link |
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This is from the first pic "jiikine". Encoded with 998.
The bug is at 00:11 http://www.megaupload.com/?d=BQHJ7KU2 |
27th October 2008, 22:11 | #1230 | Link | |
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Quote:
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27th October 2008, 22:44 | #1232 | Link |
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This is actually rather interesting... its a false skip. This shouldn't happen, especially in this kind of case. I'm going to guess what happened, since you said it began in revision 995, is that the encoder chose a direct macroblock with 8x8 transform, falsely identified all the quantized DCTs as empty, and so declared it a skip.
... any chance you can try a build compiled with a different version of gcc? |
27th October 2008, 22:59 | #1234 | Link |
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Look at the last couple pages of this thread; there are various other builds you can try. Also, could someone post a build with --disable-asm? If, when compiled with that, there are no problems, its yet another issue with that stupid array_non_zero code that keeps biting us in the ass.
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27th October 2008, 23:10 | #1235 | Link |
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Here you go:
* http://www.mediafire.com/file/1zinvy...999-gcc432.zip * http://www.mediafire.com/file/m0ymzo...c432-noasm.zip * http://www.mediafire.com/file/liimtv...pthreadGC2.zip BTW: Please don't tell me that x264 r1000 will be a simple bugfix release
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27th October 2008, 23:13 | #1236 | Link |
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Rev 999 with ./configure --disable-asm
http://users.telenet.be/darnley/x264...r999_no-asm.7z
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27th October 2008, 23:35 | #1237 | Link | |
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28th October 2008, 14:34 | #1238 | Link | |
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I've done a partial encode with gcc432-noasm and the bug doesn't seem to appear. I'm doing a complete encode with this right now (i'll post as it finishes). As a sidenote with the noasm there is a huge performance drop. In order of 3 fps (noasm) against 15fps (asm). |
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28th October 2008, 14:37 | #1239 | Link |
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What a surprise
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h.264, x264, x264 builds, x264 patches, x264 unofficial builds |
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