我用了
ffmpeg.exe -ss 310 -i "H:\_REC\100MEDIA\someavi.AVI" -ss 0 -t 14 -vf "rotate='54*PI/180:ow=hypot(iw,ih):oh=ow'" -vf scale=1920:1080 "H:\_REC\100MEDIA\somemp4.mp4"
它应该将视频（当前为 1920 x 1080、MJPEG、30fps）旋转 54° 左右并将其调整到 1920 x 1080 像素。
它的作用是，忽略-vf "rotate='54*PI/180:ow=hypot(iw,ih):oh=ow'" -vf scale=1920:1080并返回片段。
要改变什么？
注：ffmpeg版本N-59696-gc0a33c4
输出：
E:\Ffmpeg\bin>ffmpeg -ss 310 -i "H:\_REC\100MEDIA\someavi.AVI"
-ss 0 -t 14 -vf "rotate='54*PI/180:ow=hypot(iw,ih):oh=ow'" -vf sca
le=1920:1080 "H:\_REC\100MEDIA\somemp4.mp4"
ffmpeg version N-59696-gc0a33c4 Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 8 2014 22:07:06 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. 62.100 / 52. 62.100
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
[avi @ 0000000002858060] non-interleaved AVI
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, avi, from 'H:\_REC\100MEDIA\someavi.AVI':
Duration: 00:19:59.95, start: 0.000000, bitrate: 13866 kb/s
Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj420p(pc), 1920x1080, 30 t
br, 30 tbn, 30 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 8000 Hz, mono, s16, 1
28 kb/s
File 'H:\_REC\100MEDIA\somemp4.mp4' already exists.
Overwrite ? [y/N] y
No pixel format specified, yuvj420p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 00000000049f2980] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
[libx264 @ 00000000049f2980] profile High, level 4.0
[libx264 @ 00000000049f2980] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC cod
ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 r
ef=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_pski
p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
imate=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
Output #0, mp4, to 'H:\_REC\100MEDIA\somemp4.mp4':
Metadata:
encoder : Lavf55.22.102
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p, 1920x
1080, q=-1--1, 1000k tbn, 30 tbc
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 8000 Hz, mo
no, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg -> libx264)
Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
Press [q] to stop, [?] for help
frame= 30 fps=0.0 q=0.0 size= 0kB time=00:00:00.82 bitrate= 0.5kbits/s
frame= 55 fps= 54 q=0.0 size= 0kB time=00:00:01.59 bitrate= 0.2kbits/s
frame= 75 fps= 46 q=29.0 size= 600kB time=00:00:02.10 bitrate=2337.0kbits/
frame= 90 fps= 41 q=29.0 size= 1017kB time=00:00:02.61 bitrate=3185.9kbits/
frame= 105 fps= 37 q=29.0 size= 1482kB time=00:00:03.12 bitrate=3881.8kbits/
frame= 120 fps= 35 q=29.0 size= 1959kB time=00:00:03.76 bitrate=4258.3kbits/
frame= 140 fps= 35 q=29.0 size= 2588kB time=00:00:04.28 bitrate=4953.2kbits/
frame= 145 fps= 32 q=29.0 size= 2742kB time=00:00:04.66 bitrate=4816.0kbits/
frame= 162 fps= 32 q=29.0 size= 3274kB time=00:00:05.17 bitrate=5181.6kbits/
frame= 177 fps= 32 q=29.0 size= 3744kB time=00:00:05.56 bitrate=5515.8kbits/
frame= 190 fps= 31 q=29.0 size= 4144kB time=00:00:06.07 bitrate=5591.5kbits/
frame= 205 fps= 31 q=29.0 size= 4612kB time=00:00:06.45 bitrate=5851.7kbits/
frame= 215 fps= 30 q=29.0 size= 4895kB time=00:00:06.96 bitrate=5754.9kbits/
frame= 227 fps= 30 q=29.0 size= 5169kB time=00:00:07.35 bitrate=5759.4kbits/
frame= 245 fps= 30 q=29.0 size= 5571kB time=00:00:07.99 bitrate=5710.1kbits/
frame= 262 fps= 30 q=29.0 size= 6052kB time=00:00:08.50 bitrate=5830.4kbits/
frame= 280 fps= 30 q=29.0 size= 6505kB time=00:00:09.14 bitrate=5827.4kbits/
frame= 300 fps= 30 q=29.0 size= 7048kB time=00:00:09.65 bitrate=5979.4kbits/
frame= 305 fps= 29 q=29.0 size= 7175kB time=00:00:09.91 bitrate=5930.2kbits/
frame= 322 fps= 29 q=29.0 size= 7675kB time=00:00:10.55 bitrate=5958.3kbits/
frame= 342 fps= 29 q=29.0 size= 8237kB time=00:00:11.06 bitrate=6098.9kbits/
frame= 357 fps= 29 q=29.0 size= 8661kB time=00:00:11.70 bitrate=6062.0kbits/
frame= 369 fps= 29 q=29.0 size= 9010kB time=00:00:12.08 bitrate=6105.8kbits/
frame= 387 fps= 29 q=29.0 size= 9501kB time=00:00:12.72 bitrate=6115.2kbits/
frame= 407 fps= 29 q=29.0 size= 10052kB time=00:00:13.24 bitrate=6219.2kbits/
frame= 414 fps= 29 q=29.0 size= 10257kB time=00:00:13.62 bitrate=6167.7kbits/
frame= 421 fps= 26 q=-1.0 Lsize= 12062kB time=00:00:14.00 bitrate=7053.8kbits
/s dup=253 drop=0
video:12036kB audio:19kB subtitle:0 global headers:0kB muxing overhead 0.054462%
[libx264 @ 00000000049f2980] frame I:2 Avg QP:21.20 size:106302
[libx264 @ 00000000049f2980] frame P:336 Avg QP:23.51 size: 36006
[libx264 @ 00000000049f2980] frame B:83 Avg QP:23.96 size: 169
[libx264 @ 00000000049f2980] consecutive B-frames: 60.6% 39.4% 0.0% 0.0%
[libx264 @ 00000000049f2980] mb I I16..4: 2.0% 96.2% 1.8%
[libx264 @ 00000000049f2980] mb P I16..4: 0.6% 31.1% 0.1% P16..4: 13.6% 3.3
% 1.4% 0.0% 0.0% skip:49.8%
[libx264 @ 00000000049f2980] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 1.3% 0.0
% 0.0% direct: 0.0% skip:98.7% L0: 1.5% L1:98.5% BI: 0.0%
[libx264 @ 00000000049f2980] 8x8 transform intra:97.7% inter:79.3%
[libx264 @ 00000000049f2980] coded y,uvDC,uvAC intra: 86.0% 87.6% 8.9% inter: 9.
3% 15.7% 1.4%
[libx264 @ 00000000049f2980] i16 v,h,dc,p: 7% 7% 6% 80%
[libx264 @ 00000000049f2980] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 14% 54% 3% 3%
2% 3% 3% 3%
[libx264 @ 00000000049f2980] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 12% 14% 6% 21%
5% 19% 5% 4%
[libx264 @ 00000000049f2980] i8c dc,h,v,p: 47% 24% 25% 3%
[libx264 @ 00000000049f2980] Weighted P-Frames: Y:3.6% UV:3.0%
[libx264 @ 00000000049f2980] ref P L0: 57.9% 15.5% 9.5% 16.4% 0.7%
[libx264 @ 00000000049f2980] ref B L0: 34.6% 65.4%
[libx264 @ 00000000049f2980] kb/s:7025.99