У меня есть много видео, снятых в формате 1080p с использованием Nexus 5 под управлением Android Lollipop. Я уменьшил их до 720p с помощью ffmpeg v3.1.5 (с тех пор я установил качество записи видео на 720p, прежде чем кто-либо это укажет). Некоторые в портретной ориентации. Я использую следующую команду на тех:
ffmpeg -i VID_20150919_121521.mp4 -vf scale=720:-1 VID_20150919_121521-2.mp4
Я счастлив просто позволить ffmpeg сделать это. Я доволен результатами. Однако я был удивлен, узнав, что мне не нужно использовать опцию транспонирования. Как вы можете видеть в выходных данных ниже, есть некоторые метаданные ротации. Я понятия не имею, имеет ли это отношение, просто помещаю это там. Теперь это технически работает - видео масштабируется до 720p и воспроизводится в правильной ориентации в VLC, но нет миниатюры проводника Windows 7 и в деталях свойств нет информации о ширине и высоте кадра или о частоте кадров. Все мои другие пейзажные видео просто уменьшены, и я получаю эскиз и информацию о кадре. Что происходит и как мне это исправить?
ffmpeg version 3.1.5 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 28.100 / 55. 28.100
libavcodec 57. 48.101 / 57. 48.101
libavformat 57. 41.100 / 57. 41.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 47.100 / 6. 47.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'VID_20150919_121521.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2015-09-19 16:15:29
location : +45.4699-075.5184/
location-eng : +45.4699-075.5184/
Duration: 00:00:06.53, start: 0.000000, bitrate: 12568 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 12217 kb/s, SAR 1:1 DAR 16:9, 30.32 fps, 30 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 90
creation_time : 2015-09-19 16:15:29
handler_name : VideoHandle
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 96 kb/s (default)
Metadata:
creation_time : 2015-09-19 16:15:29
handler_name : SoundHandle
[libx264 @ 0000000002d7fa80] using SAR=1/1
[libx264 @ 0000000002d7fa80] using cpu capabilities: MMX2 SSE2Fast LZCNT
[libx264 @ 0000000002d7fa80] profile High, level 3.1
[libx264 @ 0000000002d7fa80] 264 - core 148 r2721 72d53ab - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=4 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=25 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
[mp4 @ 00000000005ef4e0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
Last message repeated 1 times
Output #0, mp4, to 'VID_20150919_121521-2.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
location-eng : +45.4699-075.5184/
location : +45.4699-075.5184/
encoder : Lavf57.41.100
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x1280 [SAR 1:1 DAR 9:16], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandle
creation_time : 2015-09-19 16:15:29
encoder : Lavc57.48.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, mono, fltp, 69 kb/s (default)
Metadata:
creation_time : 2015-09-19 16:15:29
handler_name : SoundHandle
encoder : Lavc57.48.101 aac
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
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frame= 47 fps= 37 q=0.0 size= 0kB time=00:00:02.00 bitrate= 0.2kbits/s speed=1.59x
frame= 55 fps= 31 q=29.0 size= 142kB time=00:00:02.00 bitrate= 580.1kbits/s speed=1.11x
Past duration 0.608986 too large
frame= 63 fps= 26 q=29.0 size= 289kB time=00:00:03.00 bitrate= 788.3kbits/s speed=1.24x
Past duration 0.619331 too large
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frame= 71 fps= 22 q=29.0 size= 482kB time=00:00:03.00 bitrate=1312.7kbits/s speed=0.951x
Past duration 0.701653 too large
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frame= 79 fps= 21 q=29.0 size= 651kB time=00:00:03.00 bitrate=1772.3kbits/s speed=0.797x
Past duration 0.790993 too large
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frame= 86 fps= 20 q=29.0 size= 786kB time=00:00:03.00 bitrate=2141.7kbits/s speed=0.696x
Past duration 0.865990 too large
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Past duration 0.911659 too large
Past duration 0.924660 too large
frame= 92 fps= 19 q=29.0 size= 900kB time=00:00:03.00 bitrate=2452.0kbits/s speed=0.62x
Past duration 0.931999 too large
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Past duration 0.997993 too large
frame= 100 fps= 18 q=29.0 size= 1055kB time=00:00:04.01 bitrate=2154.8kbits/s speed=0.735x
frame= 107 fps= 18 q=29.0 size= 1186kB time=00:00:04.01 bitrate=2421.8kbits/s speed=0.665x
frame= 115 fps= 17 q=29.0 size= 1325kB time=00:00:04.01 bitrate=2707.1kbits/s speed=0.594x
frame= 123 fps= 17 q=29.0 size= 1458kB time=00:00:04.01 bitrate=2979.0kbits/s speed=0.545x
frame= 130 fps= 17 q=29.0 size= 1587kB time=00:00:05.01 bitrate=2592.5kbits/s speed=0.637x
frame= 135 fps= 16 q=29.0 size= 1676kB time=00:00:05.01 bitrate=2738.8kbits/s speed=0.597x
frame= 143 fps= 16 q=29.0 size= 1828kB time=00:00:05.01 bitrate=2986.4kbits/s speed=0.552x
frame= 150 fps= 16 q=29.0 size= 1963kB time=00:00:05.01 bitrate=3207.7kbits/s speed=0.523x
frame= 156 fps= 15 q=29.0 size= 2055kB time=00:00:06.01 bitrate=2799.0kbits/s speed=0.594x
frame= 163 fps= 15 q=29.0 size= 2208kB time=00:00:06.01 bitrate=3006.9kbits/s speed=0.561x
frame= 171 fps= 15 q=29.0 size= 2373kB time=00:00:06.01 bitrate=3230.9kbits/s speed=0.525x
frame= 179 fps= 15 q=29.0 size= 2518kB time=00:00:06.01 bitrate=3428.5kbits/s speed=0.494x
frame= 185 fps= 15 q=29.0 size= 2631kB time=00:00:06.01 bitrate=3583.0kbits/s speed=0.475x
frame= 191 fps= 14 q=29.0 size= 2738kB time=00:00:06.03 bitrate=3715.2kbits/s speed=0.456x
frame= 194 fps= 12 q=-1.0 Lsize= 3555kB time=00:00:06.52 bitrate=4461.1kbits/s speed=0.398x
video:3490kB audio:56kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.233024%
[libx264 @ 0000000002d7fa80] frame I:3 Avg QP:23.00 size: 34556
[libx264 @ 0000000002d7fa80] frame P:50 Avg QP:25.33 size: 30594
[libx264 @ 0000000002d7fa80] frame B:141 Avg QP:26.77 size: 13760
[libx264 @ 0000000002d7fa80] consecutive B-frames: 1.5% 3.1% 4.6% 90.7%
[libx264 @ 0000000002d7fa80] mb I I16..4: 11.0% 81.3% 7.7%
[libx264 @ 0000000002d7fa80] mb P I16..4: 6.7% 40.0% 3.5% P16..4: 33.6% 10.1% 4.3% 0.0% 0.0% skip: 1.7%
[libx264 @ 0000000002d7fa80] mb B I16..4: 1.3% 4.3% 0.2% B16..8: 45.2% 8.6% 1.3% direct:12.7% skip:26.5% L0:47.3% L1:47.7% BI: 5.0%
[libx264 @ 0000000002d7fa80] 8x8 transform intra:78.6% inter:77.3%
[libx264 @ 0000000002d7fa80] coded y,uvDC,uvAC intra: 61.0% 86.1% 49.6% inter: 28.9% 48.0% 5.4%
[libx264 @ 0000000002d7fa80] i16 v,h,dc,p: 19% 16% 8% 57%
[libx264 @ 0000000002d7fa80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 17% 21% 6% 7% 7% 8% 7% 10%
[libx264 @ 0000000002d7fa80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 23% 17% 6% 8% 6% 7% 5% 6%
[libx264 @ 0000000002d7fa80] i8c dc,h,v,p: 57% 18% 18% 7%
[libx264 @ 0000000002d7fa80] Weighted P-Frames: Y:4.0% UV:2.0%
[libx264 @ 0000000002d7fa80] ref P L0: 65.2% 12.5% 16.0% 6.1% 0.1%
[libx264 @ 0000000002d7fa80] ref B L0: 93.7% 5.1% 1.2%
[libx264 @ 0000000002d7fa80] ref B L1: 98.2% 1.8%
[libx264 @ 0000000002d7fa80] kb/s:4420.90
[aac @ 0000000000531400] Qavg: 673.912