[FFmpeg-user] Two frames trimmed of source start

Fri Sep 22 17:33:05 EEST 2017

Hi guys,
Trying to do a simple transcode, but the output is missing 2 frames at the start.
I can live with that, but the timecode is then off by 2 frames as well.
How can I tell if the trimming will / will not occur so I can compensate the TC stamp?
(Or even better, can I avoid the trimming?)
thx,

Bouke

Boukes-portable:~ bouke$ /Users/bouke/Desktop/ffmpeg -i /Users/bouke/Desktop/Judith/LV6A3186_0226D1A.mov /Users/bouke/Desktop/Judith/test.mp4
ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
  built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  libavutil      55. 58.100 / 55. 58.100
  libavcodec     57. 89.100 / 57. 89.100
  libavformat    57. 71.100 / 57. 71.100
  libavdevice    57.  6.100 / 57.  6.100
  libavfilter     6. 82.100 /  6. 82.100
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/bouke/Desktop/Judith/LV6A3186_0226D1A.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2017-09-22T13:07:25.000000Z
  Duration: 00:00:06.17, start: 0.000000, bitrate: 14219 kb/s
    Stream #0:0(und): Video: prores (apcn / 0x6E637061), yuv422p10le(bt709, progressive), 480x270, 12679 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 24k tbn, 24k tbc (default)
    Metadata:
      creation_time   : 2017-09-22T13:07:25.000000Z
      handler_name    : Core Media Data Handler
      encoder         : Apple ProRes 422
      timecode        : 08:38:58:09
    Stream #0:1(und): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2017-09-22T13:07:25.000000Z
      handler_name    : Core Media Data Handler
    Stream #0:2(und): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2017-09-22T13:07:25.000000Z
      handler_name    : Core Media Data Handler
      timecode        : 08:38:58:09
Stream mapping:
  Stream #0:0 -> #0:0 (prores (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
No pixel format specified, yuv422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x7fe83b026600] using SAR=1/1
[libx264 @ 0x7fe83b026600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fe83b026600] profile High 4:2:2, level 2.1, 4:2:2 8-bit
[libx264 @ 0x7fe83b026600] 264 - core 148 - 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=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=23 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 '/Users/bouke/Desktop/Judith/test.mp4':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    encoder         : Lavf57.71.100
    Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 480x270 [SAR 1:1 DAR 16:9], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc (default)
    Metadata:
      creation_time   : 2017-09-22T13:07:25.000000Z
      handler_name    : Core Media Data Handler
      timecode        : 08:38:58:09
      encoder         : Lavc57.89.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2017-09-22T13:07:25.000000Z
      handler_name    : Core Media Data Handler
      encoder         : Lavc57.89.100 aac
frame=   86 fps=0.0 q=28.0 size=      46kB time=00:00:04.52 bitrate=  82.6kbits/frame=  148 fps=127 q=-1.0 Lsize=     220kB time=00:00:06.18 bitrate= 291.9kbits/s speed=5.32x
video:213kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.750126%
[libx264 @ 0x7fe83b026600] frame I:1     Avg QP:23.73  size:  2878
[libx264 @ 0x7fe83b026600] frame P:40    Avg QP:23.76  size:  3321
[libx264 @ 0x7fe83b026600] frame B:107   Avg QP:26.74  size:   762
[libx264 @ 0x7fe83b026600] consecutive B-frames:  1.4%  2.7% 12.2% 83.8%
[libx264 @ 0x7fe83b026600] mb I  I16..4: 40.8% 55.3%  3.9%
[libx264 @ 0x7fe83b026600] mb P  I16..4:  4.4% 11.6%  1.3%  P16..4: 47.8% 19.1%  7.2%  0.0%  0.0%    skip: 8.7%
[libx264 @ 0x7fe83b026600] mb B  I16..4:  0.2%  0.7%  0.1%  B16..8: 43.5%  4.2%  0.6%  direct: 1.7%  skip:49.1%  L0:42.6% L1:51.8% BI: 5.6%
[libx264 @ 0x7fe83b026600] 8x8 transform intra:66.0% inter:83.1%
[libx264 @ 0x7fe83b026600] coded y,uvDC,uvAC intra: 47.9% 82.3% 14.6% inter: 12.2% 24.9% 0.9%
[libx264 @ 0x7fe83b026600] i16 v,h,dc,p: 17% 13%  3% 68%
[libx264 @ 0x7fe83b026600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 16% 14%  5% 11% 11%  9%  7%  5%
[libx264 @ 0x7fe83b026600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 18% 13%  4% 11% 10%  7%  5%  3%
[libx264 @ 0x7fe83b026600] i8c dc,h,v,p: 46% 14% 27% 12%
[libx264 @ 0x7fe83b026600] Weighted P-Frames: Y:2.5% UV:0.0%
[libx264 @ 0x7fe83b026600] ref P L0: 66.5% 13.4% 14.4%  5.4%  0.3%
[libx264 @ 0x7fe83b026600] ref B L0: 94.4%  4.8%  0.8%
[libx264 @ 0x7fe83b026600] ref B L1: 96.8%  3.2%
[libx264 @ 0x7fe83b026600] kb/s:281.55
[aac @ 0x7fe83b027e00] Qavg: 65536.000
Boukes-portable:~ bouke$

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