#2970: White line in top macroblock of dvvideo
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Reporter: cehoyos | Owner:
Type: defect | Status: open
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: dvvideo | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by kurosu):
For info, the sequence is SD 4:2:2, and the strange blocks are all coded
as 2x4x8 (as in interlaced), ie dct_mode=1 at dvdec.c:205
By using factor_table as it was dct_mode=0, the decoded result looks much
better. It is possible that the quantization scale derivation may be wrong
in case of 4:2:2. I couldn't decipher what to make of section 5.3/figure
28/table 23 here, and the whole code is somewhat hard to follow.
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Ticket URL: <https://trac.ffmpeg.org/ticket/2970#comment:2>
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