Обновление: я смотрел выходное видео на другом компьютере, и это было нормально. Должно быть, проблема была в программе, которую я использовал для просмотра видео. Не берите в голову.
Я пытаюсь сжать видео, снятые моей камерой Canon, для хранения. К сожалению, выходное видео имеет пониженную частоту кадров, что делает видео не плавным. Я пытался использовать -r 25 для увеличения частоты кадров, но это не имеет значения. ffmpeg, кажется, игнорирует эту опцию. Есть ли способ заставить ffmpeg использовать переменную частоту кадров более высокого качества или постоянную частоту кадров? Нужно ли использовать другой видеокодек? Нужно ли использовать что-то, кроме ffmpeg? После долгих исследований я не смог добиться какого-либо прогресса. Я могу добавить ссылку на вход и выход видео, если это необходимо. Вот пример запуска:
H:\test>ffmpeg -i input.mov -c:v libx264 -crf 23 -r 25 -force_fps -c:a aac -stri
ct experimental out.mp4
ffmpeg version N-59532-gadc09a3 Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 3 2014 22:01:54 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 59.100 / 52. 59.100
libavcodec 55. 47.100 / 55. 47.100
libavformat 55. 22.102 / 55. 22.102
libavdevice 55. 5.102 / 55. 5.102
libavfilter 4. 0.103 / 4. 0.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mov':
Metadata:
major_brand : qt
minor_version : 537331968
compatible_brands: qt CAEP
creation_time : 2013-09-05 22:18:02
Duration: 00:00:17.04, start: 0.000000, bitrate: 21175 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu
vj420p(pc, smpte170m), 1280x720, 19592 kb/s, 25 fps, 25 tbr, 25k tbn, 50k tbc (d
efault)
Metadata:
creation_time : 2013-09-05 22:18:02
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s1
6, 1536 kb/s (default)
Metadata:
creation_time : 2013-09-05 22:18:02
No pixel format specified, yuvj420p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0319fc20] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0319fc20] profile High, level 3.1
[libx264 @ 0319fc20] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC codec - Cop
yleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
ma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 i
nterlaced=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 scenec
ut=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 'out.mp4':
Metadata:
major_brand : qt
minor_version : 537331968
compatible_brands: qt CAEP
encoder : Lavf55.22.102
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p,
1280x720, q=-1--1, 12800 tbn, 25 tbc (default)
Metadata:
creation_time : 2013-09-05 22:18:02
Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, flt
p, 128 kb/s (default)
Metadata:
creation_time : 2013-09-05 22:18:02
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (pcm_s16le -> aac)
Press [q] to stop, [?] for help
frame= 46 fps=0.0 q=0.0 size= 0kB time=00:00:01.89 bitrate= 0.2kbits/s
frame= 53 fps= 41 q=28.0 size= 77kB time=00:00:02.34 bitrate= 268.0kbits/
frame= 58 fps= 33 q=28.0 size= 152kB time=00:00:02.34 bitrate= 531.2kbits/
frame= 65 fps= 27 q=28.0 size= 246kB time=00:00:02.83 bitrate= 711.6kbits/
frame= 70 fps= 24 q=28.0 size= 303kB time=00:00:02.85 bitrate= 869.2kbits/
frame= 76 fps= 22 q=28.0 size= 370kB time=00:00:03.30 bitrate= 916.8kbits/
frame= 82 fps= 20 q=28.0 size= 437kB time=00:00:03.30 bitrate=1082.6kbits/
frame= 87 fps= 19 q=26.0 size= 505kB time=00:00:03.79 bitrate=1089.7kbits/
frame= 94 fps= 19 q=28.0 size= 630kB time=00:00:03.79 bitrate=1358.8kbits/
frame= 99 fps= 18 q=28.0 size= 708kB time=00:00:04.26 bitrate=1358.9kbits/
frame= 104 fps= 17 q=28.0 size= 782kB time=00:00:04.26 bitrate=1502.3kbits/
frame= 111 fps= 16 q=28.0 size= 913kB time=00:00:04.75 bitrate=1572.5kbits/
frame= 117 fps= 16 q=28.0 size= 1004kB time=00:00:04.75 bitrate=1729.6kbits/
frame= 124 fps= 15 q=28.0 size= 1104kB time=00:00:05.22 bitrate=1729.9kbits/
frame= 130 fps= 15 q=28.0 size= 1217kB time=00:00:05.22 bitrate=1907.4kbits/
frame= 135 fps= 14 q=28.0 size= 1372kB time=00:00:05.71 bitrate=1966.4kbits/
frame= 139 fps= 14 q=28.0 size= 1538kB time=00:00:05.71 bitrate=2203.6kbits/
frame= 142 fps= 13 q=28.0 size= 1644kB time=00:00:05.73 bitrate=2346.4kbits/
frame= 148 fps= 13 q=28.0 size= 1838kB time=00:00:06.18 bitrate=2433.3kbits/
frame= 153 fps= 13 q=28.0 size= 2016kB time=00:00:06.18 bitrate=2669.4kbits/
frame= 157 fps= 13 q=28.0 size= 2170kB time=00:00:06.67 bitrate=2662.2kbits/
frame= 162 fps= 12 q=28.0 size= 2398kB time=00:00:06.67 bitrate=2942.2kbits/
frame= 166 fps= 12 q=28.0 size= 2556kB time=00:00:06.67 bitrate=3135.8kbits/
frame= 171 fps= 12 q=28.0 size= 2745kB time=00:00:07.14 bitrate=3146.4kbits/
frame= 177 fps= 12 q=28.0 size= 2987kB time=00:00:07.14 bitrate=3424.4kbits/
frame= 182 fps= 12 q=28.0 size= 3223kB time=00:00:07.63 bitrate=3457.1kbits/
frame= 188 fps= 12 q=28.0 size= 3481kB time=00:00:07.63 bitrate=3734.2kbits/
frame= 193 fps= 12 q=28.0 size= 3688kB time=00:00:08.10 bitrate=3726.3kbits/
frame= 198 fps= 11 q=28.0 size= 3894kB time=00:00:08.10 bitrate=3934.8kbits/
frame= 202 fps= 11 q=28.0 size= 4084kB time=00:00:08.10 bitrate=4126.8kbits/
frame= 208 fps= 11 q=28.0 size= 4388kB time=00:00:08.59 bitrate=4181.1kbits/
frame= 213 fps= 11 q=28.0 size= 4592kB time=00:00:08.59 bitrate=4375.6kbits/
frame= 218 fps= 11 q=28.0 size= 4805kB time=00:00:09.06 bitrate=4341.8kbits/
frame= 222 fps= 11 q=28.0 size= 4976kB time=00:00:09.06 bitrate=4495.5kbits/
frame= 226 fps= 11 q=28.0 size= 5139kB time=00:00:09.17 bitrate=4589.1kbits/
frame= 231 fps= 11 q=28.0 size= 5388kB time=00:00:09.55 bitrate=4618.3kbits/
frame= 236 fps= 11 q=28.0 size= 5597kB time=00:00:09.55 bitrate=4797.0kbits/
frame= 241 fps= 11 q=28.0 size= 5820kB time=00:00:10.02 bitrate=4754.9kbits/
frame= 244 fps= 10 q=28.0 size= 5929kB time=00:00:10.02 bitrate=4844.1kbits/
frame= 247 fps= 10 q=25.0 size= 6074kB time=00:00:10.02 bitrate=4962.3kbits/
frame= 252 fps= 10 q=28.0 size= 6366kB time=00:00:10.51 bitrate=4958.3kbits/
frame= 257 fps= 10 q=28.0 size= 6678kB time=00:00:10.51 bitrate=5201.1kbits/
frame= 260 fps= 10 q=28.0 size= 6888kB time=00:00:10.51 bitrate=5365.1kbits/
frame= 265 fps= 10 q=28.0 size= 7162kB time=00:00:10.98 bitrate=5340.1kbits/
frame= 269 fps=9.9 q=28.0 size= 7360kB time=00:00:10.98 bitrate=5487.6kbits/
frame= 273 fps=9.9 q=28.0 size= 7577kB time=00:00:10.98 bitrate=5650.0kbits/
frame= 276 fps=9.8 q=28.0 size= 7793kB time=00:00:11.47 bitrate=5562.6kbits/
frame= 280 fps=9.7 q=28.0 size= 7997kB time=00:00:11.47 bitrate=5708.1kbits/
frame= 284 fps=9.6 q=28.0 size= 8242kB time=00:00:11.47 bitrate=5882.8kbits/
frame= 289 fps=9.5 q=28.0 size= 8546kB time=00:00:11.94 bitrate=5860.2kbits/
frame= 293 fps=9.5 q=28.0 size= 8783kB time=00:00:11.94 bitrate=6023.0kbits/
frame= 298 fps=9.4 q=28.0 size= 9060kB time=00:00:11.94 bitrate=6212.6kbits/
frame= 302 fps=9.4 q=28.0 size= 9312kB time=00:00:12.43 bitrate=6133.1kbits/
frame= 306 fps=9.3 q=28.0 size= 9535kB time=00:00:12.43 bitrate=6280.6kbits/
frame= 309 fps=9.3 q=28.0 size= 9701kB time=00:00:12.43 bitrate=6389.6kbits/
frame= 313 fps=9.2 q=28.0 size= 9923kB time=00:00:12.90 bitrate=6298.4kbits/
frame= 316 fps=9.2 q=28.0 size= 10074kB time=00:00:12.90 bitrate=6394.2kbits/
frame= 321 fps=9.1 q=28.0 size= 10300kB time=00:00:12.90 bitrate=6537.8kbits/
frame= 326 fps=9.1 q=28.0 size= 10542kB time=00:00:13.39 bitrate=6445.9kbits/
frame= 332 fps=9.1 q=28.0 size= 10853kB time=00:00:13.39 bitrate=6636.1kbits/
frame= 337 fps=9.0 q=28.0 size= 11126kB time=00:00:13.86 bitrate=6573.2kbits/
frame= 342 fps=9.0 q=28.0 size= 11391kB time=00:00:13.86 bitrate=6729.7kbits/
frame= 346 fps=9.0 q=28.0 size= 11588kB time=00:00:14.16 bitrate=6701.2kbits/
frame= 351 fps=9.0 q=28.0 size= 11843kB time=00:00:14.35 bitrate=6757.5kbits/
frame= 355 fps=9.0 q=28.0 size= 12061kB time=00:00:14.35 bitrate=6881.6kbits/
frame= 361 fps=9.0 q=28.0 size= 12349kB time=00:00:14.82 bitrate=6822.8kbits/
frame= 367 fps=9.0 q=28.0 size= 12620kB time=00:00:14.82 bitrate=6972.6kbits/
frame= 372 fps=9.0 q=28.0 size= 12868kB time=00:00:15.31 bitrate=6881.9kbits/
frame= 377 fps=8.9 q=28.0 size= 13054kB time=00:00:15.31 bitrate=6981.7kbits/
frame= 382 fps=8.9 q=28.0 size= 13284kB time=00:00:15.31 bitrate=7104.7kbits/
frame= 388 fps=9.0 q=28.0 size= 13538kB time=00:00:15.78 bitrate=7025.1kbits/
frame= 393 fps=9.0 q=28.0 size= 13740kB time=00:00:15.78 bitrate=7129.9kbits/
frame= 397 fps=8.9 q=28.0 size= 13918kB time=00:00:16.27 bitrate=7004.5kbits/
frame= 403 fps=9.0 q=28.0 size= 14150kB time=00:00:16.27 bitrate=7121.2kbits/
frame= 408 fps=9.0 q=28.0 size= 14338kB time=00:00:16.74 bitrate=7013.8kbits/
frame= 412 fps=9.0 q=28.0 size= 14494kB time=00:00:16.74 bitrate=7090.2kbits/
frame= 417 fps=9.0 q=28.0 size= 14663kB time=00:00:16.74 bitrate=7172.7kbits/
frame= 423 fps=9.0 q=28.0 size= 14918kB time=00:00:16.98 bitrate=7196.5kbits/
frame= 426 fps=8.1 q=-1.0 Lsize= 17139kB time=00:00:17.04 bitrate=8237.1kbits
/s
video:16860kB audio:267kB subtitle:0 global headers:0kB muxing overhead 0.074326
%
[libx264 @ 0319fc20] frame I:7 Avg QP:22.59 size: 32989
[libx264 @ 0319fc20] frame P:297 Avg QP:26.67 size: 47713
[libx264 @ 0319fc20] frame B:122 Avg QP:29.30 size: 23459
[libx264 @ 0319fc20] consecutive B-frames: 43.0% 56.3% 0.7% 0.0%
[libx264 @ 0319fc20] mb I I16..4: 34.1% 58.2% 7.7%
[libx264 @ 0319fc20] mb P I16..4: 5.9% 14.0% 6.5% P16..4: 43.0% 18.8% 9.0%
0.0% 0.0% skip: 2.8%
[libx264 @ 0319fc20] mb B I16..4: 0.6% 1.2% 0.5% B16..8: 50.5% 11.3% 3.1%
direct:14.7% skip:18.1% L0:38.2% L1:37.5% BI:24.3%
[libx264 @ 0319fc20] 8x8 transform intra:53.3% inter:48.3%
[libx264 @ 0319fc20] coded y,uvDC,uvAC intra: 67.6% 70.7% 24.2% inter: 56.1% 47.
0% 1.4%
[libx264 @ 0319fc20] i16 v,h,dc,p: 16% 24% 21% 39%
[libx264 @ 0319fc20] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 22% 24% 5% 5% 5% 7%
6% 8%
[libx264 @ 0319fc20] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 21% 19% 6% 7% 6% 7%
7% 7%
[libx264 @ 0319fc20] i8c dc,h,v,p: 54% 25% 16% 5%
[libx264 @ 0319fc20] Weighted P-Frames: Y:20.5% UV:14.8%
[libx264 @ 0319fc20] ref P L0: 63.8% 21.7% 10.3% 4.0% 0.2%
[libx264 @ 0319fc20] ref B L0: 94.9% 5.1% 0.0%
[libx264 @ 0319fc20] ref B L1: 100.0% 0.0%
[libx264 @ 0319fc20] kb/s:8105.05