[FFmpeg-user] remap filter gives only black and white output

[Michael Koch]

I also tested the fisheye_grid_xmap.pgm and fisheye_grid_ymap.pgm files 
which can be downloaded from the Wiki page:
https://trac.ffmpeg.org/wiki/RemapFilter
Same problem, the output is black and white. So I think it's not a 
problem of my own map files.

Michael


F:\xxx\xxx>c:/ffmpeg/ffmpeg -i in.mp4 -i fisheye_grid_
xmap.pgm -i fisheye_grid_ymap.pgm -lavfi "remap" -c:v mpeg4 -q:v 2 -y 
out.mp4
ffmpeg version N-89127-g8f4702a93f Copyright (c) 2000-2017 the FFmpeg 
developers

   built with gcc 7.2.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-sdl2 
--enable-bzlib --e
nable-fontconfig --enable-gnutls --enable-iconv --enable-libass 
--enable-libblur
ay --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg 
--enable-libopu
s --enable-libshine --enable-libsnappy --enable-libsoxr 
--enable-libtheora --ena
ble-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp 
--enable-lib
x264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma 
--enable-z
lib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda 
--enable-c
uvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth 
--enable-l
ibmfx
   libavutil      56.  0.100 / 56.  0.100
   libavcodec     58.  3.103 / 58.  3.103
   libavformat    58.  2.100 / 58.  2.100
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7.  2.100 /  7.  2.100
   libswscale      5.  0.101 /  5.  0.101
   libswresample   3.  0.101 /  3.  0.101
   libpostproc    55.  0.100 / 55.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf58.0.102
   Duration: 00:00:12.02, start: 0.000000, bitrate: 22472 kb/s
     Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 
0x7634706D), yuv420p
, 1000x1000 [SAR 1:1 DAR 1:1], 22381 kb/s, 30 fps, 30 tbr, 15360 tbn, 30 
tbc (de
fault)
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, 
stereo, flt
p, 127 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
Input #1, pgm_pipe, from 'fisheye_grid_xmap.pgm':
   Duration: N/A, bitrate: N/A
     Stream #1:0: Video: pgm, gray16le, 400x400, 25 tbr, 25 tbn, 25 tbc
Input #2, pgm_pipe, from 'fisheye_grid_ymap.pgm':
   Duration: N/A, bitrate: N/A
     Stream #2:0: Video: pgm, gray16le, 400x400, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
   Stream #0:0 (mpeg4) -> remap:source (graph 0)
   Stream #1:0 (pgm) -> remap:xmap (graph 0)
   Stream #2:0 (pgm) -> remap:ymap (graph 0)
   remap (graph 0) -> Stream #0:0 (mpeg4)
   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'out.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf58.2.100
     Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 400x400 
[SAR 1:1 DAR
  1:1], q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc (default)
     Metadata:
       encoder         : Lavc58.3.103 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, 
stereo, flt
p, 128 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
       encoder         : Lavc58.3.103 aac
frame=   79 fps=0.0 q=2.0 size=     512kB time=00:00:02.73 
bitrate=1530.9kbits/s
frame=  164 fps=159 q=2.0 size=    1792kB time=00:00:05.57 
bitrate=2634.3kbits/s
frame=  253 fps=164 q=2.0 size=    3072kB time=00:00:08.52 
bitrate=2953.2kbits/s
frame=  347 fps=169 q=2.0 size=    4096kB time=00:00:11.65 
bitrate=2878.7kbits/s
frame=  360 fps=170 q=2.0 Lsize=    4367kB time=00:00:12.00 
bitrate=2979.8kbits/
s speed=5.66x
video:4168kB audio:188kB subtitle:0kB other streams:0kB global 
headers:0kB muxin
g overhead: 0.262168%
[aac @ 00000000005d3040] Qavg: 206.162