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• How to resize dimensions of video through ffmpeg-python ?

  25 janvier, par kunambi

  I'm trying to resize a video file which a user has uploaded to Django, by using ffmpeg-python. The documentation isn't very easy to understand, so I've tried to cobble this together from various sources.

  


  This method is run in a celery container, in order to not slow the experience for the user. The problem I'm facing is that I can't seem to resize the video file. I've tried two different approaches :

  


  from django.db import models
from io import BytesIO
from myapp.models import MediaModel


def resize_video(mypk: str) -> None:
    instance = MediaModel.objects.get(pk=mypk)
    media_instance: models.FileField = instance.media
    media_output = "test.mp4"
    buffer = BytesIO()

    for chunk in media_instance.chunks():
        buffer.write(chunk)

    stream_video = ffmpeg.input("pipe:").video.filter("scale", 720, -1)  # resize to 720px width
    stream_audio = ffmpeg.input("pipe:").audio
    process = (
        ffmpeg.output(stream_video, stream_audio, media_output, acodec="aac")
        .overwrite_output()
        .run_async(pipe_stdin=True, quiet=True)
    )
    buffer.seek(0)
    process_out, process_err = process.communicate(input=buffer.getbuffer())
    # (pdb) process_out
    # b''

    # attempting to use `.concat` instead
    process2 = (
        ffmpeg.concat(stream_video, stream_audio, v=1, a=1)
        .output(media_output)
        .overwrite_output()
        .run_async(pipe_stdin=True, quiet=True)
    )
    buffer.seek(0)
    process2_out, process2_err = process2.communicate(input=buffer.getbuffer())
    # (pdb) process2_out
    # b''


  


  As we can see, no matter which approach chosen, the output is an empty binary. The process_err and process2_err both generate the following message :

  


  ffmpeg version N-111491-g31979127f8-20230717 Copyright (c) 2000-2023 the
FFmpeg developers
  built with gcc 13.1.0 (crosstool-NG 1.25.0.196_227d99d)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
--enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
--enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
--disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib
--enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth
--enable-chromaprint --enable-libdav1d --enable-libdavs2
--disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r
--enable-libgme --enable-libkvazaar --enable-libass --enable-libbluray
--enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist
--enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp
--enable-lv2 --enable-libvpl --enable-openal --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg
--enable-libopenmpt --enable-librav1e --enable-librubberband
--enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt
--enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm
--disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc
--enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2
--enable-libxvid --enable-libzimg --enable-libzvbi
--extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags=
--extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp
--extra-version=20230717
  libavutil      58. 14.100 / 58. 14.100
  libavcodec     60. 22.100 / 60. 22.100
  libavformat    60. 10.100 / 60. 10.100
  libavdevice    60.  2.101 / 60.  2.101
  libavfilter     9.  8.102 /  9.  8.102
  libswscale      7.  3.100 /  7.  3.100
  libswresample   4. 11.100 /  4. 11.100
  libpostproc    57.  2.100 / 57.  2.100
 "Input #0, mov,mp4,m4a,3gp,3g2,mj2, frompipe:':\r\n"
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2020-11-10T15:01:09.000000Z
  Duration: 00:00:04.16, start: 0.000000, bitrate: N/A
  Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661),
yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 2649 kb/s, 25 fps, 25
tbr, 25k tbn (default)
    Metadata:
      creation_time   : 2020-11-10T15:01:09.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2020-11-10T15:01:09.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 (h264) -> scale:default (graph 0)
  scale:default (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
[libx264 @ 00000243a23a1100] using SAR=1/1
[libx264 @ 00000243a23a1100] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000243a23a1100] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 00000243a23a1100] 264 - core 164 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2023 - 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, toaa37f8d7685f4df9af85b1cdcd95997e.mp4':\r\n"
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    encoder         : Lavf60.10.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, progressive),
800x450 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn
    Metadata:
      encoder         : Lavc60.22.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2020-11-10T15:01:09.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.22.100 aac
frame=    0 fps=0.0 q=0.0 size=       0kB time=N/A bitrate=N/A
speed=N/A    \r'
frame=   21 fps=0.0 q=28.0 size=       0kB time=00:00:02.75 bitrate=  
0.1kbits/s speed=4.75x    \r'
[out#0/mp4 @ 00000243a230bd80] video:91kB audio:67kB subtitle:0kB other
streams:0kB global headers:0kB muxing overhead: 2.838559%
frame=  104 fps=101 q=-1.0 Lsize=     162kB time=00:00:04.13 bitrate=
320.6kbits/s speed=4.02x    
[libx264 @ 00000243a23a1100] frame I:1     Avg QP:18.56  size:  2456
[libx264 @ 00000243a23a1100] frame P:33    Avg QP:16.86  size:  1552
[libx264 @ 00000243a23a1100] frame B:70    Avg QP:17.55  size:   553
[libx264 @ 00000243a23a1100] consecutive B-frames:  4.8% 11.5% 14.4%
69.2%
[libx264 @ 00000243a23a1100] mb I  I16..4: 17.3% 82.1%  0.6%
[libx264 @ 00000243a23a1100] mb P  I16..4:  5.9% 15.2%  0.4%  P16..4: 18.3% 
0.9%  0.4%  0.0%  0.0%    skip:58.7%
[libx264 @ 00000243a23a1100] mb B  I16..4:  0.8%  0.3%  0.0%  B16..8: 15.4% 
1.0%  0.0%  direct: 3.6%  skip:78.9%  L0:34.2% L1:64.0% BI: 1.7%
[libx264 @ 00000243a23a1100] 8x8 transform intra:68.2% inter:82.3%
[libx264 @ 00000243a23a1100] coded y,uvDC,uvAC intra: 4.2% 18.4% 1.2% inter:
1.0% 6.9% 0.0%
[libx264 @ 00000243a23a1100] i16 v,h,dc,p: 53% 25%  8% 14%
[libx264 @ 00000243a23a1100] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19%  6% 70%  1% 
1%  1%  1%  0%  0%
[libx264 @ 00000243a23a1100] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46% 21% 15%  2% 
5%  4%  3%  3%  1%
[libx264 @ 00000243a23a1100] i8c dc,h,v,p: 71% 15% 13%  1%
[libx264 @ 00000243a23a1100] Weighted P-Frames: Y:30.3% UV:15.2%
[libx264 @ 00000243a23a1100] ref P L0: 46.7%  7.5% 34.6%  7.3%  3.9%
[libx264 @ 00000243a23a1100] ref B L0: 88.0% 10.5%  1.5%
[libx264 @ 00000243a23a1100] ref B L1: 98.1%  1.9%
[libx264 @ 00000243a23a1100] kb/s:177.73
[aac @ 00000243a23a2e00] Qavg: 1353.589


  


  I'm at a loss right now, would love any feedback/solution.

  


• Combining three or more videos with ffmpeg and the xfade filter

  25 février 2021, par sil

  As of 2020 ffmpeg has the xfade filter which can combine videos with a transition. Combining two videos is easy enough :

  


  ffmpeg -i vid1.mp4 -i vid2.mp4 \
  -filter_complex [0][1]xfade=transition=pixelize:duration=1:offset=4,format=yuv420p" \
  out.mp4


  


  But I don't understand how to combine three videos (so that v1 fades into v2 and v2 then fades into v3. I tried something like this :

  


  ffmpeg -i vid1.mp4 -i vid2.mp4 -i vid3.mp4 \
  -filter_complex [0][1]xfade=transition=pixelize:duration=1:offset=4,format=yuv420p[0n1];[0n1][2]xfade=transition=pixelize:duration=1:offset=9,format=yuv420p" \
  out.mp4


  


  but that doesn't work. My idea was that 0 and 1, or vid1 and vid2, would be combined into a [0n1] stream with a transition by xfade, and then that 0n1 stream could be combined with vid3 with another filter. As far as I can tell, this includes the first two videos but not the third. What this of course means is that I don't understand how to specify a filtergraph correctly !

  


  How should I use xfade to combine 3 or more videos with transitions between them ?

  


  A full example is as follows. Here I'll use three images (because then issues with combining videos at different frame rates are avoided), and smash them all to 500x500 for ease (in the final version they would be letterboxed to keep resolution and so on).

  


  ffmpeg \
  -loop 1 -t 5 -i tests/p1.jpg \
  -loop 1 -t 5 -i tests/p2.jpg \
  -loop 1 -t 5 -i tests/p3.jpg \
  -filter_complex "[0]scale=500:500[s0];[1]scale=500:500[s1];[2]scale=500:500[s2];[s0][s1]xfade=transition=pixelize:duration=1:offset=4,format=yuv420p[s01];[s01][s2]xfade=transition=pixelize:duration=1:offset=9,format=yuv420p" out.mp4


  


  I would expect this to create a video which was :

  


  

  • 4 seconds of p1.jpg

  


  • a pixelise transition into p2.jpg lasting 1 second

  


  • 4 seconds of p2.jpg

  


  • a pixelise transition into p3.jpg lasting 1 second

  


  • 4 seconds of p3.jpg

  


  


  but what I actually get is

  


  

  • 4 seconds of p1.jpg

  


  • a pixelise transition into p2.jpg lasting 1 second

  


  • 4 seconds of p2.jpg

  


  


  and then the video ends. p3 is not included at all.

  


  The output is as follows :

  


  ffmpeg version N-53546-g5eb4405fc5-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  libavutil      56. 56.100 / 56. 56.100
  libavcodec     58. 97.100 / 58. 97.100
  libavformat    58. 49.100 / 58. 49.100
  libavdevice    58. 11.101 / 58. 11.101
  libavfilter     7. 87.100 /  7. 87.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Input #0, image2, from 'tests/p1.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 44845 kb/s
    Stream #0:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 820x1270 [SAR 150:150 DAR 82:127], 25 fps, 25 tbr, 25 tbn, 25 tbc
Input #1, image2, from 'tests/p2.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 22325 kb/s
    Stream #1:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 960x600 [SAR 1:1 DAR 8:5], 25 fps, 25 tbr, 25 tbn, 25 tbc
Input #2, image2, from 'tests/p3.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 15266 kb/s
    Stream #2:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 728x669 [SAR 96:96 DAR 728:669], 25 fps, 25 tbr, 25 tbn, 25 tbc
File 'out.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 (mjpeg) -> scale
  Stream #1:0 (mjpeg) -> scale
  Stream #2:0 (mjpeg) -> scale
  format -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[swscaler @ 0x8228040] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x8258640] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x827df40] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x829f800] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x82c13c0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x82e8340] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x77b7600] using SAR=82/127
[libx264 @ 0x77b7600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x77b7600] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x77b7600] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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 'out.mp4':
  Metadata:
    encoder         : Lavf58.49.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 500x500 [SAR 82:127 DAR 82:127], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.97.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=  101 fps=100 q=28.0 size=       0kB time=00:00:01.92 bitrate=   0.2kbits/s speed=[swscaler @ 0x8291d80] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 2 times
[swscaler @ 0x82b3000] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 2 times
[swscaler @ 0x82fc200] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 2 times
frame=  153 fps=101 q=28.0 size=       0kB time=00:00:04.00 bitrate=   0.1kbits/s speed=[swscaler @ 0x82fc200] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 2 times
frame=  225 fps=111 q=28.0 size=     256kB time=00:00:06.88 bitrate= 304.9kbits/s dup=0 frame=  225 fps= 95 q=-1.0 Lsize=     267kB time=00:00:08.88 bitrate= 245.9kbits/s dup=0 drop=125 speed=3.74x    
video:263kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.293847%
[libx264 @ 0x77b7600] frame I:2     Avg QP:21.03  size: 19928
[libx264 @ 0x77b7600] frame P:66    Avg QP:21.18  size:  2453
[libx264 @ 0x77b7600] frame B:157   Avg QP:29.72  size:   427
[libx264 @ 0x77b7600] consecutive B-frames:  5.3%  4.4%  1.3% 88.9%
[libx264 @ 0x77b7600] mb I  I16..4: 29.0% 27.8% 43.2%
[libx264 @ 0x77b7600] mb P  I16..4: 10.8%  3.2%  7.5%  P16..4:  2.6%  0.9%  0.3%  0.0%  0.0%    skip:74.8%
[libx264 @ 0x77b7600] mb B  I16..4:  1.1%  0.5%  1.6%  B16..8:  1.0%  0.5%  0.1%  direct: 0.3%  skip:94.9%  L0:37.4% L1:43.5% BI:19.1%
[libx264 @ 0x77b7600] 8x8 transform intra:16.5% inter:55.3%
[libx264 @ 0x77b7600] coded y,uvDC,uvAC intra: 31.4% 71.7% 31.8% inter: 1.1% 1.4% 0.1%
[libx264 @ 0x77b7600] i16 v,h,dc,p: 45% 46%  9%  1%
[libx264 @ 0x77b7600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 30% 27%  6%  1%  1%  2%  1%  7%
[libx264 @ 0x77b7600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 56% 31%  9%  1%  1%  1%  1%  1%  1%
[libx264 @ 0x77b7600] i8c dc,h,v,p: 46% 27% 23%  4%
[libx264 @ 0x77b7600] Weighted P-Frames: Y:10.6% UV:7.6%
[libx264 @ 0x77b7600] ref P L0: 61.9% 17.1% 13.9%  6.8%  0.3%
[libx264 @ 0x77b7600] ref B L0: 76.3% 22.8%  0.9%
[libx264 @ 0x77b7600] ref B L1: 97.6%  2.4%
[libx264 @ 0x77b7600] kb/s:238.88


  


• ffmpeg video won't play in certain players

  25 janvier 2021, par Thomas Tiotto

  I'm generating a video in /folder/ from a stack of images in /folder/tmp/ using the following command :

  


   ffmpeg -pattern_type glob -i 'folder/tmp/*.png' -c:v libx264 -preset veryslow -crf 17 -tune stillimage -y -pix_fmt yuv420p folder/weight_evolution.mp4


  


  but my video won't play in, for example, QuickTime ("The file isn’t compatible with QuickTime Player.") and even sending it in Telegram gives really strange results. The video plays fine in IINA and VLC.

  


  As you can see, this is what is encoded by Telegram :

  


  

  


  and this is what the video should look like :

  


  

  


  The output of the command is :

  


  ffmpeg -pattern_type glob -i 'tmp/*.png' -c:v libx264 -preset veryslow -crf 17 -tune stillimage -y -pix_fmt yuv420p weight_evolution.mp4
    ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
      built with Apple clang version 12.0.0 (clang-1200.0.32.28)
      configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_7 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
      libavutil      56. 51.100 / 56. 51.100
      libavcodec     58. 91.100 / 58. 91.100
      libavformat    58. 45.100 / 58. 45.100
      libavdevice    58. 10.100 / 58. 10.100
      libavfilter     7. 85.100 /  7. 85.100
      libavresample   4.  0.  0 /  4.  0.  0
      libswscale      5.  7.100 /  5.  7.100
      libswresample   3.  7.100 /  3.  7.100
      libpostproc    55.  7.100 / 55.  7.100
    Input #0, image2, from 'tmp/*.png':
      Duration: 00:00:10.28, start: 0.000000, bitrate: N/A
        Stream #0:0: Video: png, rgba(pc), 1280x720 [SAR 3937:3937 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
    Stream mapping:
      Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
    Press [q] to stop, [?] for help
    [libx264 @ 0x7f804c009400] using SAR=1/1
    [libx264 @ 0x7f804c009400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    [libx264 @ 0x7f804c009400] profile High, level 5.0, 4:2:0, 8-bit
    [libx264 @ 0x7f804c009400] 264 - core 161 r3027 4121277 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:-3:-3 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=2.00:0.70 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-4 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1 crf=17.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.20
    Output #0, mp4, to 'weight_evolution.mp4':
      Metadata:
        encoder         : Lavf58.45.100
        Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
        Metadata:
          encoder         : Lavc58.91.100 libx264
        Side data:
          cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    frame=   72 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   frame=  126 fps=110 q=22.0 size=       0kB time=00:00:01.68 bitrate=   0.2kbits/frame=  185 fps=112 q=22.0 size=       0kB time=00:00:04.04 bitrate=   0.1kbits/frame=  245 fps=113 q=22.0 size=       0kB time=00:00:06.44 bitrate=   0.1kbits/frame=  257 fps= 97 q=-1.0 Lsize=     209kB time=00:00:10.16 bitrate= 168.7kbits/s speed=3.83x
    video:206kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.448294%
    [libx264 @ 0x7f804c009400] frame I:2     Avg QP: 4.16  size: 92234
    [libx264 @ 0x7f804c009400] frame P:36    Avg QP:24.07  size:   156
    [libx264 @ 0x7f804c009400] frame B:219   Avg QP:26.50  size:    93
    [libx264 @ 0x7f804c009400] consecutive B-frames:  0.8%  0.0%  0.0%  1.6%  9.7% 23.3% 10.9% 18.7% 35.0%
    [libx264 @ 0x7f804c009400] mb I  I16..4: 87.5%  4.4%  8.2%
    [libx264 @ 0x7f804c009400] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.8%  0.0%  0.0%  0.0%  0.0%    skip:99.1%
    [libx264 @ 0x7f804c009400] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.3%  0.0%  0.0%  direct: 0.0%  skip:99.7%  L0:71.2% L1:28.4% BI: 0.4%
    [libx264 @ 0x7f804c009400] 8x8 transform intra:4.7% inter:22.5%
    [libx264 @ 0x7f804c009400] direct mvs  spatial:96.8% temporal:3.2%
    [libx264 @ 0x7f804c009400] coded y,uvDC,uvAC intra: 14.7% 14.6% 14.6% inter: 0.0% 0.0% 0.0%
    [libx264 @ 0x7f804c009400] i16 v,h,dc,p: 89%  2%  9%  0%
    [libx264 @ 0x7f804c009400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 40% 31%  1%  1%  1%  1%  1%  2%
    [libx264 @ 0x7f804c009400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 41% 27% 22%  2%  2%  2%  1%  2%  2%
    [libx264 @ 0x7f804c009400] i8c dc,h,v,p: 91%  4%  3%  2%
    [libx264 @ 0x7f804c009400] Weighted P-Frames: Y:0.0% UV:0.0%
    [libx264 @ 0x7f804c009400] ref P L0: 89.1%  0.5%  4.8%  1.1%  1.5%  0.7%  0.2%  0.9%  0.2%  0.1%  0.1%  0.3%  0.1%  0.2%  0.1%  0.1%
    [libx264 @ 0x7f804c009400] ref B L0: 37.4% 17.9% 11.7%  7.0%  5.5%  5.5%  4.4%  2.0%  1.5%  1.6%  1.2%  1.9%  1.5%  0.7%  0.1%
    [libx264 @ 0x7f804c009400] ref B L1: 92.0%  8.0%
    [libx264 @ 0x7f804c009400] kb/s:163.83