[FFmpeg-user] Guidance on converting images to video

Sun Oct 11 00:51:51 CEST 2015

>> [libx264 @ 0x1bc3e80] using cpu capabilities: none!
>
>And you wonder why it's slow.  You're on x86-64.  You at least have SSE2
>instructions.  Why are you not using them?  You have to explicitly
>disable assembly when building x264 to get "none".

So the quickest test was the static packages linked on the ffmpeg
site, that produced greatly improved results. In your opinion, is
the choice of libx264 most optimal for this type of work or do you
recommend something else?

Thanks a lot for taking the time,
jlc

# time ../ffmpeg-git-20151010-64bit-static/ffmpeg -y -framerate 5 -i %05d-capture.jpg -codec libx264 /tmp/out.mp4
ffmpeg version N-50355-gdab5f65-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.3 (Debian 4.9.3-4)
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --cc=gcc-4.9
  libavutil      55.  3.100 / 55.  3.100
  libavcodec     57.  4.101 / 57.  4.101
  libavformat    57.  3.100 / 57.  3.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 10.100 /  6. 10.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.100 /  2.  0.100
  libpostproc    54.  0.100 / 54.  0.100
Input #0, image2, from '%05d-capture.jpg':
  Duration: 00:09:59.40, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 352x240 [SAR 1:1 DAR 22:15], 5 fps, 5 tbr, 5 tbn, 5 tbc
No pixel format specified, yuvj420p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x4a6f6e0] using SAR=1/1
[libx264 @ 0x4a6f6e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0x4a6f6e0] profile High, level 1.2
[libx264 @ 0x4a6f6e0] 264 - core 148 r168 e86f3a1 - 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=1 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=5 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 '/tmp/out.mp4':
  Metadata:
    encoder         : Lavf57.3.100
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p(pc), 352x240 [SAR 1:1 DAR 22:15], q=-1--1, 5 fps, 10240 tbn, 5 tbc
    Metadata:
      encoder         : Lavc57.4.101 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 2997 fps= 61 q=23.0 Lsize=   19637kB time=00:09:59.00 bitrate= 268.6kbits/s
video:19601kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.184754%
[libx264 @ 0x4a6f6e0] frame I:12    Avg QP:16.22  size: 32827
[libx264 @ 0x4a6f6e0] frame P:1479  Avg QP:18.99  size: 10132
[libx264 @ 0x4a6f6e0] frame B:1506  Avg QP:26.17  size:  3115
[libx264 @ 0x4a6f6e0] consecutive B-frames:  0.7% 95.8%  3.5%  0.0%
[libx264 @ 0x4a6f6e0] mb I  I16..4:  0.0% 99.4%  0.6%
[libx264 @ 0x4a6f6e0] mb P  I16..4:  0.0%  0.3%  0.0%  P16..4: 23.3% 30.7% 45.7%  0.0%  0.0%    skip: 0.0%
[libx264 @ 0x4a6f6e0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 14.0% 13.8% 16.9%  direct:23.3%  skip:32.0%  L0:52.1% L1:20.9% BI:27.0%
[libx264 @ 0x4a6f6e0] 8x8 transform intra:95.5% inter:98.5%
[libx264 @ 0x4a6f6e0] coded y,uvDC,uvAC intra: 99.9% 97.5% 75.4% inter: 71.4% 78.5% 52.0%
[libx264 @ 0x4a6f6e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 17% 25%  4%  9%  5% 12%  4% 10%
[libx264 @ 0x4a6f6e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 14% 14%  4% 10%  9% 11%  9% 11%
[libx264 @ 0x4a6f6e0] i8c dc,h,v,p: 59% 19% 14%  7%
[libx264 @ 0x4a6f6e0] Weighted P-Frames: Y:0.4% UV:0.0%
[libx264 @ 0x4a6f6e0] ref P L0: 33.4%  7.5% 32.4% 26.6%  0.1%
[libx264 @ 0x4a6f6e0] ref B L0: 56.3% 43.2%  0.5%
[libx264 @ 0x4a6f6e0] ref B L1: 98.4%  1.6%
[libx264 @ 0x4a6f6e0] kb/s:267.87

real    0m49.433s
user    0m48.280s
sys     0m0.251s