I've written a C# program to create my own xmap and ymap files for the
remap filter.
The geometric distortion in the output video looks as expected. But why
is the output only black and white?
I've tested two different input videos with the same result. No colors
in the output.
The console output is attached below.
Thanks,
Michael
F:\xxx\xxx>c:/ffmpeg/ffmpeg -i in.mp4 -i xmap_1000.pgm
-i ymap_1000.pgm -lavfi remap -c:v mpeg4 -q:v 2 -y out.mp4
ffmpeg version N-88555-g6ea7711532 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. 1.100 / 58. 1.100
libavformat 58. 0.102 / 58. 0.102
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 0.101 / 7. 0.101
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 'xmap_1000.pgm':
Duration: N/A, bitrate: N/A
Stream #1:0: Video: pgm, gray16le, 1000x1000, 25 tbr, 25 tbn, 25 tbc
Input #2, pgm_pipe, from 'ymap_1000.pgm':
Duration: N/A, bitrate: N/A
Stream #2:0: Video: pgm, gray16le, 1000x1000, 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 : Lavf58.0.102
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 1000x1000
[SAR 1:1 D
AR 1:1], q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc58.1.100 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 : Lavc58.1.100 aac
frame= 43 fps=0.0 q=2.0 size= 1024kB time=00:00:01.53
bitrate=5474.0kbits/s
frame= 91 fps= 88 q=2.0 size= 3840kB time=00:00:03.11
bitrate=10110.2kbits/
frame= 137 fps= 89 q=2.0 size= 7168kB time=00:00:04.64
bitrate=12644.4kbits/
frame= 184 fps= 89 q=2.0 size= 10496kB time=00:00:06.19
bitrate=13868.9kbits/
frame= 231 fps= 90 q=2.0 size= 13824kB time=00:00:07.77
bitrate=14558.6kbits/
frame= 280 fps= 91 q=2.0 size= 17408kB time=00:00:09.42
bitrate=15127.0kbits/
frame= 329 fps= 91 q=2.0 size= 19968kB time=00:00:11.07
bitrate=14768.8kbits/
frame= 360 fps= 92 q=2.0 Lsize= 20827kB time=00:00:12.00
bitrate=14212.0kbits
/s speed=3.08x
video:20628kB audio:188kB subtitle:0kB other streams:0kB global
headers:0kB muxi
ng overhead: 0.054835%
[aac @ 00000000005d2d80] Qavg: 206.162
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