[FFmpeg-user] rotating a video losses quality

Mauricio Ulargui mulargui at hotmail.com
Wed Feb 13 20:05:27 CET 2013


Hi, I want to rotate a video recorded with an iPhone and keep its quality. Below is the command that I use, but it losses quality. Suggestions?
The file before rotating is 189,889 Kb
The file after rotating is 78,866 Kb

  ffmpeg -i "kendama.mp4" -acodec copy -vf "transpose=2" "kendama2.mp4"

ffmpeg version 1.1.1 Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 20 2013 23:05:28 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 13.100 / 52. 13.100
  libavcodec     54. 86.100 / 54. 86.100
  libavformat    54. 59.106 / 54. 59.106
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 32.100 /  3. 32.100
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'kendama.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.59.106
  Duration: 00:02:24.28, start: 0.000000, bitrate: 10781 kb/s
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 10713 kb/s, 29.92 fps, 30 tbr, 19200 tbn, 38400 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s
    Metadata:
      handler_name    : SoundHandler
[libx264 @ 03eb6ba0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 03eb6ba0] profile High, level 3.1
[libx264 @ 03eb6ba0] 264 - core 129 r2245 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - 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=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 'kendama2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.59.106
    Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 720x1280, q=-1--1, 15360 tbn, 30 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, 63 kb/s
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=   46 fps=0.0 q=0.0 size=       0kB time=00:00:01.67 bitrate=   0.2kbits/s    
frame=   56 fps= 45 q=29.0 size=     157kB time=00:00:01.99 bitrate= 643.5kbits/s    
frame=   63 fps= 35 q=29.0 size=     238kB time=00:00:02.22 bitrate= 875.3kbits/s    
frame=   72 fps= 31 q=29.0 size=     361kB time=00:00:02.53 bitrate=1169.8kbits/s    
frame=   80 fps= 27 q=29.0 size=     471kB time=00:00:02.80 bitrate=1372.1kbits/s    
frame=   90 fps= 25 q=29.0 size=     581kB time=00:00:03.16 bitrate=1502.7kbits/s    
frame=  100 fps= 24 q=29.0 size=     693kB time=00:00:03.44 bitrate=1648.1kbits/s dup=1 drop=0    
frame=  111 fps= 24 q=29.0 size=     784kB time=00:00:03.81 bitrate=1683.6kbits/s dup=1 drop=0    
frame=  120 fps= 23 q=29.0 size=     874kB time=00:00:04.11 bitrate=1739.7kbits/s dup=1 drop=0    
frame=  131 fps= 23 q=29.0 size=     986kB time=00:00:04.48 bitrate=1799.3kbits/s dup=1 drop=0    
. . . . . . . . .frame= 4296 fps= 13 q=29.0 size=   75536kB time=00:02:23.34 bitrate=4316.6kbits/s dup=11 drop=0    
frame= 4300 fps= 13 q=29.0 size=   75719kB time=00:02:23.48 bitrate=4322.9kbits/s dup=11 drop=0    
frame= 4306 fps= 13 q=29.0 size=   75966kB time=00:02:23.67 bitrate=4331.4kbits/s dup=11 drop=0    
frame= 4313 fps= 13 q=29.0 size=   76260kB time=00:02:23.90 bitrate=4341.2kbits/s dup=11 drop=0    
frame= 4319 fps= 13 q=29.0 size=   76520kB time=00:02:24.11 bitrate=4349.6kbits/s dup=11 drop=0    
frame= 4327 fps= 13 q=-1.0 Lsize=   78866kB time=00:02:24.27 bitrate=4477.9kbits/s dup=11 drop=0    
video:77590kB audio:1126kB subtitle:0 global headers:0kB muxing overhead 0.190978%
[libx264 @ 03eb6ba0] frame I:33    Avg QP:23.21  size:105464
[libx264 @ 03eb6ba0] frame P:2450  Avg QP:25.97  size: 26543
[libx264 @ 03eb6ba0] frame B:1844  Avg QP:29.81  size:  5933
[libx264 @ 03eb6ba0] consecutive B-frames: 16.3% 79.3%  4.2%  0.3%
[libx264 @ 03eb6ba0] mb I  I16..4: 14.7% 49.2% 36.1%
[libx264 @ 03eb6ba0] mb P  I16..4:  1.2%  4.2%  1.7%  P16..4: 49.9% 17.8% 11.3%  0.0%  0.0%    skip:14.0%
[libx264 @ 03eb6ba0] mb B  I16..4:  0.1%  0.3%  0.2%  B16..8: 49.4%  5.2%  1.2%  direct: 1.5%  skip:42.0%  L0:45.0% L1:47.0% BI: 8.0%
[libx264 @ 03eb6ba0] 8x8 transform intra:57.2% inter:55.1%
[libx264 @ 03eb6ba0] coded y,uvDC,uvAC intra: 73.9% 71.2% 25.3% inter: 24.8% 23.9% 1.0%
[libx264 @ 03eb6ba0] i16 v,h,dc,p: 31% 27% 11% 31%
[libx264 @ 03eb6ba0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 18% 15%  5%  8%  9%  8%  8%  8%
[libx264 @ 03eb6ba0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 23% 16%  6%  8%  7%  8%  6%  6%
[libx264 @ 03eb6ba0] i8c dc,h,v,p: 51% 19% 22%  8%
[libx264 @ 03eb6ba0] Weighted P-Frames: Y:5.1% UV:0.8%
[libx264 @ 03eb6ba0] ref P L0: 74.9% 16.6%  6.0%  2.3%  0.1%
[libx264 @ 03eb6ba0] ref B L0: 97.1%  2.9%  0.0%
[libx264 @ 03eb6ba0] ref B L1: 99.4%  0.6%
[libx264 @ 03eb6ba0] kb/s:4406.81

Mauricio  @ Ulargui .com | +1 425 449 3825
             		 	   		  


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