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• 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


  


• Ffmpeg invalid data when trying to merge videos

  30 juillet 2020, par Luka Milivojevic

  I have a below function for merging videos in Python without re-encoding using FFmpeg :

  


  def merge():
    """
    This function merges a group of videos into one long video.
    It is used for merging parts that are cut from original video into a new one.
    The videos are merged using ffmpeg and for the ffmpeg
    to use the concat method on them, the video names must be put inside
    the vidlist.txt file.
    New video is saved to the file named output.mp4.
    """
    command = "ffmpeg -hide_banner -loglevel error -f concat -safe 0 -i vidlist.txt -c copy output.mp4"
    # merge multiple parts of the video
    subprocess.call(command, shell=True)


  


  I store paths to videos to be merged inside a vidlist.txt file which looks like :

  


  file 'out11.mp4'
file 'out21.mp4'


  


  But, I am getting the following error :

  


  vidlist.txt: Invalid data found when processing input


  


  Here is the report file :

  


  ffmpeg started on 2020-07-30 at 20:23:53
Report written to "ffmpeg-20200730-202353.log"
Log level: 48
Command line:
ffmpeg -hide_banner -f concat -safe 0 -i "C:\\Users\\miliv\\videocutter\\utils\\vidlist.txt" -c copy output.mp4 -report
Splitting the commandline.
Reading option '-hide_banner' ... matched as option 'hide_banner' (do not show program banner) with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'concat'.
Reading option '-safe' ... matched as AVOption 'safe' with argument '0'.
Reading option '-i' ... matched as input url with argument 'C:\Users\miliv\videocutter\utils\vidlist.txt'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option 'output.mp4' ... matched as output url.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option hide_banner (do not show program banner) with argument 1.
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url C:\Users\miliv\videocutter\utils\vidlist.txt.
Applying option f (force format) with argument concat.
Successfully parsed a group of options.
Opening an input file: C:\Users\miliv\videocutter\utils\vidlist.txt.
[concat @ 000001aaafb8e400] Opening 'C:\Users\miliv\videocutter\utils\vidlist.txt' for reading
[file @ 000001aaafb8f500] Setting default whitelist 'file,crypto,data'
[AVIOContext @ 000001aaafb97700] Statistics: 0 bytes read, 0 seeks
C:\Users\miliv\videocutter\utils\vidlist.txt: Invalid data found when processing input


  


• Convert videos in ffmpeg filter_complex with different timebases to use xfade

  28 juillet 2020, par sil

  I'd like to use ffmpeg's new xfade filter to crossfade between two videos. In theory this is easy :

  


  ffmpeg -i v1.mp4 -i v2.mp4 \
  -filter_complex "[0][1]xfade=duration=1:offset=5,format=yuv420p" \
  out.mp4


  


  However, this fails with the error :

  


  First input link main timebase (1/1500) do not match the corresponding second input link xfade timebase (1/30000)

  


  Obviously these two videos do have different timebases. This is confirmed by the ffmpeg output :

  


  Stream #0:0(eng): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1280x720 [SAR 1:1 DAR 16:9], 536 kb/s, 15 fps, 15 tbr, 1500 tbn, 30 tbc (default)
...
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/bt709), 1280x720 [SAR 1:1 DAR 16:9], 1117 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)


  


  I don't want to convert each video and save the results and then combine the two new temporary disk files. Is it possible to use -filter_complex to convert the videos before xfade so that they have the same timebase ? So that I can run one command which takes any two videos and crossfades between them ?

  


  Attempting to set the timebase explicitly with the settb filter seems to work at first but then gets "stuck" on frame 3 and never makes any more progress :

  


  $ ffmpeg -i v1.mp4 -i v2.mp4 -filter_complex "[0]settb=1/AVTB[v0];[1]settb=1/AVTB[v1];[v0][v1]xfade=duration=1:offset=5,format=yuv420p" out.mp4
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, mov,mp4,m4a,3gp,3g2,mj2, from 'v1.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41isomiso2
    creation_time   : 2014-08-20T20:47:56.000000Z
    encoder         : x264
  Duration: 00:00:12.67, start: 0.000000, bitrate: 538 kb/s
    Stream #0:0(eng): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1280x720 [SAR 1:1 DAR 16:9], 536 kb/s, 15 fps, 15 tbr, 1500 tbn, 30 tbc (default)
    Metadata:
      creation_time   : 2014-08-20T20:47:56.000000Z
      handler_name    : VideoHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'v2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:00:04.31, start: 0.000000, bitrate: 1286 kb/s
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/bt709), 1280x720 [SAR 1:1 DAR 16:9], 1117 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 159 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File 'out.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 (h264) -> settb (graph 0)
  Stream #1:0 (h264) -> settb (graph 0)
  format (graph 0) -> Stream #0:0 (libx264)
  Stream #1:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x69aaac0] using SAR=1/1
[libx264 @ 0x69aaac0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x69aaac0] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x69aaac0] 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=15 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:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41isomiso2
    encoder         : Lavf58.49.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 15 fps, 15360 tbn, 15 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
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.97.100 aac
frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:02.94 bitrate=   0.1kbits/s
frame=    3 fps=3.0 q=0.0 size=       0kB time=00:00:04.24 bitrate=   0.1kbits/s
frame=    3 fps=2.0 q=0.0 size=       0kB time=00:00:04.24 bitrate=   0.1kbits/s
frame=    3 fps=1.5 q=0.0 size=       0kB time=00:00:04.24 bitrate=   0.1kbits/s
(and repeat this line forever)