後書き
随分前に、「100mm ニュートン式反射望遠鏡 F5」に 10万画素カラービデオカメラを付けて撮影したものです。 赤道義が無く、経緯台に載せて居ました。 x軸ｙ軸は手で動かせたのですが、手ブレの影響が大きく出るので 撮影中は触らず動かさず撮影しました。 PC(WindowsXP)のビデオキャプチャボードにカメラを繋いで映像をキャプチャしました。 その時の映像の保存形式はAVIファイル形式だったと思います。 その後、時代の流れに従って、 ウィンドウズメディアコンバーターで、ファイル形式をWMA形式に変換して保存しました。 最近のiPhoneで再生できないことに気付いたので、mp4形式にコンバートしました。 ネットでLinuxMINT上での変換のしかたを検索してコマンドを見つけました。
コマンド例 ： ffmpeg -i input.wma output.mp4
user1@user1-CF-AX3GDCTS ~/ダウンロード $ ffmpeg -i moon1003010811.wmv moon.mp4
ffmpeg version 2.8.17-0ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
configuration: --prefix=/usr --extra-version=0ubuntu0.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
WARNING: library configuration mismatch
avcodec configuration: --prefix=/usr --extra-version=0ubuntu0.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv --enable-version3 --disable-doc --disable-programs --disable-avdevice --disable-avfilter --disable-avformat --disable-avresample --disable-postproc --disable-swscale --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libvo_aacenc --enable-libvo_amrwbenc
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, asf, from 'moon1003010811.wmv':
Metadata:
title : MOON
artist : name
copyright : name (c)
comment : 100mm ニュートン式反射望遠鏡 F5
WMFSDKVersion : 7.01.00.3055
WMFSDKNeeded : 0.0.0.0000
Duration: 00:01:52.22, start: 0.000000, bitrate: 249 kb/s
Stream #0:0: Audio: wmav2 (a[1][0][0] / 0x0161), 32000 Hz, 2 channels, fltp, 40 kb/s
Stream #0:1: Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 320x240, 15.33 fps, 15.33 tbr, 1k tbn, 1k tbc
[libx264 @ 0x21d71c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x21d71c0] profile High, level 1.2
[libx264 @ 0x21d71c0] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'moon.mp4':
Metadata:
title : MOON
artist : name
copyright : name (c)
comment : 100mm ニュートン式反射望遠鏡 F5
WMFSDKVersion : 7.01.00.3055
WMFSDKNeeded : 0.0.0.0000
encoder : Lavf56.40.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 320x240, q=-1--1, 15.33 fps, 11776 tbn, 15.33 tbc
Metadata:
encoder : Lavc56.60.100 libx264
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 32000 Hz, stereo, s16, 128 kb/s
Metadata:
encoder : Lavc56.60.100 libvo_aacenc
Stream mapping:
Stream #0:1 -> #0:0 (wmv2 (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (wmav2 (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
[libvo_aacenc @ 0x21d43c0] Queue input is backward in time
[mp4 @ 0x21d60c0] Non-monotonous DTS in output stream 0:1; previous: 5568, current: 4544; changing to 5569. This may result in incorrect timestamps in the output file.
frame= 130 fps=0.0 q=27.0 size= 135kB time=00:00:08.52 bitrate= 129.5kbits/frame= 232 fps=232 q=27.0 size= 312kB time=00:00:15.24 bitrate= 167.4kbits/frame= 326 fps=217 q=27.0 size= 481kB time=00:00:21.58 bitrate= 182.5kbits/frame= 422 fps=211 q=27.0 size= 648kB time=00:00:27.72 bitrate= 191.6kbits/frame= 513 fps=205 q=27.0 size= 804kB time=00:00:33.67 bitrate= 195.6kbits/frame= 605 fps=201 q=27.0 size= 973kB time=00:00:39.43 bitrate= 202.1kbits/frame= 689 fps=196 q=27.0 size= 1121kB time=00:00:45.19 bitrate= 203.1kbits/frame= 776 fps=193 q=27.0 size= 1278kB time=00:00:50.76 bitrate= 206.3kbits/frame= 862 fps=191 q=27.0 size= 1441kB time=00:00:56.33 bitrate= 209.5kbits/frame= 947 fps=189 q=27.0 size= 1593kB time=00:01:01.90 bitrate= 210.9kbits/frame= 1026 fps=186 q=27.0 size= 1737kB time=00:01:07.08 bitrate= 212.1kbits/frame= 1113 fps=185 q=27.0 size= 1901kB time=00:01:12.65 bitrate= 214.3kbits/frame= 1192 fps=183 q=27.0 size= 2040kB time=00:01:17.83 bitrate= 214.7kbits/frame= 1264 fps=180 q=27.0 size= 2168kB time=00:01:22.44 bitrate= 215.4kbits/frame= 1352 fps=179 q=27.0 size= 2330kB time=00:01:28.20 bitrate= 216.4kbits/frame= 1441 fps=179 q=27.0 size= 2484kB time=00:01:33.96 bitrate= 216.5kbits/frame= 1538 fps=179 q=27.0 size= 2646kB time=00:01:40.49 bitrate= 215.7kbits/frame= 1629 fps=180 q=27.0 size= 2808kB time=00:01:46.25 bitrate= 216.5kbits/frame= 1711 fps=177 q=-1.0 Lsize= 3053kB time=00:01:51.59 bitrate= 224.1kbits/s dup=3 drop=0
video:1274kB audio:1745kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.110910%
[libx264 @ 0x21d71c0] frame I:7 Avg QP:15.15 size: 8633
[libx264 @ 0x21d71c0] frame P:820 Avg QP:18.98 size: 1315
[libx264 @ 0x21d71c0] frame B:884 Avg QP:23.49 size: 187
[libx264 @ 0x21d71c0] consecutive B-frames: 31.0% 0.4% 0.2% 68.5%
[libx264 @ 0x21d71c0] mb I I16..4: 5.4% 80.7% 14.0%
[libx264 @ 0x21d71c0] mb P I16..4: 0.1% 0.8% 0.0% P16..4: 38.7% 17.8% 11.3% 0.0% 0.0% skip:31.2%
[libx264 @ 0x21d71c0] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 41.8% 0.7% 0.1% direct: 0.4% skip:57.0% L0:43.3% L1:55.0% BI: 1.7%
[libx264 @ 0x21d71c0] 8x8 transform intra:82.5% inter:64.6%
[libx264 @ 0x21d71c0] coded y,uvDC,uvAC intra: 67.6% 60.5% 37.0% inter: 12.3% 20.8% 4.3%
[libx264 @ 0x21d71c0] i16 v,h,dc,p: 57% 14% 23% 5%
[libx264 @ 0x21d71c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 14% 32% 4% 5% 5% 6% 5% 6%
[libx264 @ 0x21d71c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 15% 14% 6% 12% 9% 9% 7% 7%
[libx264 @ 0x21d71c0] i8c dc,h,v,p: 66% 16% 16% 3%
[libx264 @ 0x21d71c0] Weighted P-Frames: Y:3.5% UV:0.9%
[libx264 @ 0x21d71c0] ref P L0: 76.0% 10.2% 11.1% 2.7% 0.1%
[libx264 @ 0x21d71c0] ref B L0: 93.8% 5.4% 0.9%
[libx264 @ 0x21d71c0] ref B L1: 96.4% 3.6%
[libx264 @ 0x21d71c0] kb/s:93.51