#11265: Chroma Artifacts on the right edge of some odd width 4:2:0 videos in 
ffplay
-------------------------------------+-------------------------------------
             Reporter:  Michael      |                     Type:  defect
  Niedermayer                        |
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  swscale,     |               Blocked By:
  ffplay                             |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 ./ffplay test25.nut
 use the mouse to scale it up a bit to better see
 and then repeatly press arrow left, each time on the right side a
 different
 mix of colors appears

 test25.nut is a mpeg4 yuv420p video with 25x25 size, infact codec and
 content seem not to matter

 ==1071990== Conditional jump or move depends on uninitialised value(s)
 ==1071990==    at 0x1324673: av_clip_uint8_c (common.h:208)
 ==1071990==    by 0x13260C3: yuv2plane1_8_c (output.c:426)
 ==1071990==    by 0x12FCC0D: lum_planar_vscale (vscale.c:53)
 ==1071990==    by 0x12F0E0A: swscale (swscale.c:498)
 ==1071990==    by 0x12F320A: scale_internal (swscale.c:1046)
 ==1071990==    by 0x12F239C: scale_cascaded (swscale.c:875)
 ==1071990==    by 0x12F27D4: scale_internal (swscale.c:937)
 ==1071990==    by 0x12F3BBD: ff_sws_slice_worker (swscale.c:1240)
 ==1071990==    by 0x13DC790: run_jobs (slicethread.c:65)
 ==1071990==    by 0x13DC866: thread_worker (slicethread.c:89)
 ==1071990==    by 0x694B608: start_thread (pthread_create.c:477)
 ==1071990==    by 0x6A85352: clone (clone.S:95)
 ==1071990==
 ==1071990== Thread 83:
 ==1071990== Conditional jump or move depends on uninitialised value(s)
 ==1071990==    at 0x1324673: av_clip_uint8_c (common.h:208)
 ==1071990==    by 0x132602D: yuv2planeX_8_c (output.c:416)
 ==1071990==    by 0x12FD038: chr_planar_vscale (vscale.c:100)
 ==1071990==    by 0x12F0E0A: swscale (swscale.c:498)
 ==1071990==    by 0x12F320A: scale_internal (swscale.c:1046)
 ==1071990==    by 0x12F239C: scale_cascaded (swscale.c:875)
 ==1071990==    by 0x12F27D4: scale_internal (swscale.c:937)
 ==1071990==    by 0x12F3BBD: ff_sws_slice_worker (swscale.c:1240)
 ==1071990==    by 0x13DC790: run_jobs (slicethread.c:65)
 ==1071990==    by 0x13DC866: thread_worker (slicethread.c:89)
 ==1071990==    by 0x694B608: start_thread (pthread_create.c:477)
 ==1071990==    by 0x6A85352: clone (clone.S:95)
 ==1071990==
 ==1071990== Conditional jump or move depends on uninitialised value(s)
 ==1071990==    at 0x1324673: av_clip_uint8_c (common.h:208)
 ==1071990==    by 0x132602D: yuv2planeX_8_c (output.c:416)
 ==1071990==    by 0x12FD09E: chr_planar_vscale (vscale.c:101)
 ==1071990==    by 0x12F0E0A: swscale (swscale.c:498)
 ==1071990==    by 0x12F320A: scale_internal (swscale.c:1046)
 ==1071990==    by 0x12F239C: scale_cascaded (swscale.c:875)
 ==1071990==    by 0x12F27D4: scale_internal (swscale.c:937)
 ==1071990==    by 0x12F3BBD: ff_sws_slice_worker (swscale.c:1240)
 ==1071990==    by 0x13DC790: run_jobs (slicethread.c:65)
 ==1071990==    by 0x13DC866: thread_worker (slicethread.c:89)
 ==1071990==    by 0x694B608: start_thread (pthread_create.c:477)
 ==1071990==    by 0x6A85352: clone (clone.S:95)

 }}}

 Regression since: c619d20906d039060efbeaa822daf8e949f3ef24
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11265>
FFmpeg <https://ffmpeg.org>
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