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• FFMPEG incorrect duration from raw video stream

  28 juillet 2020, par LMB

  I have the raw video data from a video stream (no audio) and the duration when I play the raw video in VLC is 67 seconds. When I convert the file to MP4 using FFMPEG the duration is 82.68 seconds.

  


  Video is available here : https://www.filedropper.com/showdownload.php/67seconds
I am using FFMPEG/FFPROBE version git-2020-07-21-b5f1e05 on Windows.

  


  Details of the raw video here :

  


  ffprobe -i 67seconds.raw
ffprobe version git-2020-07-21-b5f1e05 Copyright (c) 2007-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200621
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 55.100 / 56. 55.100
  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, h264, from '67seconds.raw':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 640x360 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1200k tbn, 50 tbc


  


  The mp4 duration matches my ffprobe calculation against the raw file itself (2067/25 = 82.68 seconds) :

  


  ffprobe -show_entries stream=r_frame_rate,nb_read_frames -select_streams v -count_frames -of compact=p=0:nk=1 -v 0 67seconds.raw
25/1|2067


  


  What would explain this difference in durations between the raw playback and the FFMPEG interpretation and how do I encode to the same duration for this and other stream data ?

  


• Creating a timelapse from a directory of jpgs

  26 juillet 2020, par Casey Davis

  I'm using this code to create a timelapse from a directory of images. My directory has about 1600 jpgs in it that all start with the date in this format 2020-03-01-time.jpg, 2020-03-02-time-name.jpg, etc. Sorting alphabetically works just fine. It runs, but it seems to only get through a few hundred photos and makes a 3 second long mp4. I'm not sure what I'm doing wrong.

  


  I'm not opposed to moving to python or anything else. Eventually I'll need to pass some parameters in here and I'll attempt to automate it and ftp the output to a webserver.

  


  Here is the command :

  


  ffmpeg -r 24 -pattern_type glob -i '*.jpg' -s hd1080 -vcodec libx264 timelapse.mp4


  


  Here is the output :

  


  ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, image2, from '*.jpg':
  Duration: 00:01:06.32, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
File 'timelapse.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x55a43cfb1d00] using SAR=1/1
[libx264 @ 0x55a43cfb1d00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x55a43cfb1d00] profile High, level 4.0
[libx264 @ 0x55a43cfb1d00] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=12 lookahead_threads=2 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=20 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 'timelapse.mp4':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 20 fps, 10240 tbn, 20 tbc
    Metadata:
      encoder         : Lavc57.107.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=   72 fps= 11 q=-1.0 Lsize=   10663kB time=00:00:03.45 bitrate=25318.0kbits/s speed=0.507x    
video:10661kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.015737%
[libx264 @ 0x55a43cfb1d00] frame I:5     Avg QP:23.69  size:223467
[libx264 @ 0x55a43cfb1d00] frame P:33    Avg QP:26.52  size:139314
[libx264 @ 0x55a43cfb1d00] frame B:34    Avg QP:28.49  size:152989
[libx264 @ 0x55a43cfb1d00] consecutive B-frames: 33.3%  8.3%  8.3% 50.0%
[libx264 @ 0x55a43cfb1d00] mb I  I16..4:  2.2% 96.6%  1.2%
[libx264 @ 0x55a43cfb1d00] mb P  I16..4:  2.1% 78.8%  1.5%  P16..4:  9.4%  4.7%  2.6%  0.0%  0.0%    skip: 0.8%
[libx264 @ 0x55a43cfb1d00] mb B  I16..4:  1.1% 20.4%  2.3%  B16..8: 27.6% 13.7%  5.3%  direct:22.7%  skip: 6.9%  L0:33.5% L1:32.2% BI:34.3%
[libx264 @ 0x55a43cfb1d00] 8x8 transform intra:93.8% inter:86.5%
[libx264 @ 0x55a43cfb1d00] coded y,uvDC,uvAC intra: 91.5% 66.0% 17.4% inter: 77.7% 58.7% 2.2%
[libx264 @ 0x55a43cfb1d00] i16 v,h,dc,p: 13% 56%  3% 28%
[libx264 @ 0x55a43cfb1d00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 20% 39%  4%  3%  3%  4%  4%  8%
[libx264 @ 0x55a43cfb1d00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 28% 12%  5%  7%  7%  6%  7%  8%
[libx264 @ 0x55a43cfb1d00] i8c dc,h,v,p: 49% 29% 19%  3%
[libx264 @ 0x55a43cfb1d00] Weighted P-Frames: Y:30.3% UV:24.2%
[libx264 @ 0x55a43cfb1d00] ref P L0: 48.2% 17.7% 17.7% 13.3%  3.2%
[libx264 @ 0x55a43cfb1d00] ref B L0: 83.2% 14.2%  2.5%
[libx264 @ 0x55a43cfb1d00] ref B L1: 93.8%  6.2%
[libx264 @ 0x55a43cfb1d00] kb/s:24258.47


  


• Nvidia on Linux : "Codec h264_cuvid is not supported"

  2 août 2020, par Raphael

  I configured FFMPEG to use Nvidia, but when I try this command

  


  ffmpeg -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4

  


  I get the error

  


  


  [h264_cuvid @ 0x556eaa3ea780] Codec h264_cuvid is not supported

  


  


  Here's the output of nvidia-smi :

  


  +-----------------------------------------------------------------------------+
| NVIDIA-SMI 450.51.05    Driver Version: 450.51.05    CUDA Version: 11.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  GeForce 940MX       On   | 00000000:01:00.0 Off |                  N/A |
| N/A   47C    P5    N/A /  N/A |    396MiB /  2004MiB |     22%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      1131      G   /usr/lib/xorg/Xorg                 37MiB |
|    0   N/A  N/A      1883      G   /usr/lib/xorg/Xorg                129MiB |
|    0   N/A  N/A      2175      G   /usr/bin/gnome-shell               92MiB |
|    0   N/A  N/A      3649      G   ...AAAAAAAAA= --shared-files      126MiB |
+-----------------------------------------------------------------------------+


  


  And the output of ffmpeg :

  


  ffmpeg version git-2020-07-25-7c8ad72 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --enable-nonfree --enable-cuda-nvcc --enable-libnpp --enable-gpl --enable-libx264 --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
  libavutil      56. 57.100 / 56. 57.100
  libavcodec     58. 97.102 / 58. 97.102
  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