[FFmpeg-trac] #458(swscale:open): Scale filter can create output which scale filter cannot accept on its input

[FFmpeg]

#458: Scale filter can create output which scale filter cannot accept on its
input
------------------------------------+-----------------------------------
             Reporter:  mdsh        |                    Owner:  michael
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  swscale
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+-----------------------------------
Changes (by cehoyos):

 * reproduced:  0 => 1


Comment:

 {{{
 $ ./ffmpeg -i tests/lena.pnm -vf
 "slicify=32,scale=0:0,scale=0:0,format=yuv422p,scale=0:0:interl=1" -f null
 -
 ffmpeg version N-32463-g3fec40b, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Sep 11 2011 14:22:55 with gcc 4.5.3
   configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
   libavutil    51. 16. 0 / 51. 16. 0
   libavcodec   53. 13. 0 / 53. 13. 0
   libavformat  53. 12. 0 / 53. 12. 0
   libavdevice  53.  3. 0 / 53.  3. 0
   libavfilter   2. 39. 0 /  2. 39. 0
   libswscale    2.  1. 0 /  2.  1. 0
 Input #0, image2, from 'tests/lena.pnm':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0.0: Video: ppm, rgb24, 256x256, 25 tbr, 25 tbn, 25 tbc
 [buffer @ 0x12a4640] w:256 h:256 pixfmt:rgb24 tb:1/1000000 sar:0/1
 sws_param:
 [scale @ 0x12a7800] w:256 h:256 fmt:rgb24 -> w:256 h:256 fmt:yuv420p
 flags:0x4
 [scale @ 0x12a80a0] w:256 h:256 fmt:yuv420p -> w:256 h:256 fmt:yuv422p
 flags:0x4
 [scale @ 0x12a90e0] w:256 h:256 fmt:yuv422p -> w:256 h:256 fmt:rgb24
 flags:0x4
 [swscaler @ 0x12e8b20] No accelerated colorspace conversion found from
 yuv422p to rgb24.
 [swscaler @ 0x12ee6c0] No accelerated colorspace conversion found from
 yuv422p to rgb24.
 [swscaler @ 0x12f4260] No accelerated colorspace conversion found from
 yuv422p to rgb24.
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf53.12.0
     Stream #0.0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 256x256,
 q=2-31, 200 kb/s, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0.0 -> #0.0 (ppm -> rawvideo)
 Press [q] to stop, [?] for help
 Assertion y%4 == 0 failed at libavfilter/vf_scale.c:316
 Aborted
 }}}

-- 
Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/458#comment:3>
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