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• 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)


  


• Unable to use concat in stripped down version of ffmpeg

  29 juillet 2020, par Amit Bhandari

  I have compiled ffmpeg for my android app to have only essential components. I have enabled following components.

  


  --disable-everything \
--enable-demuxer=concat \
--enable-muxer=concat,mp4 \
--enable-protocol=file,subfile \
--enable-filter=amix,adelay,volume \


  


  But when I am trying to concatenate mp4 files using following command

  


  ffmpeg -y -f concat -safe 0 -i files.txt -c copy output.mp4


  


  I am receiving following error

  


  [concat @ 0x7bd7d14400] Impossible to open 'file1.mp4'
files.txt: Invalid data found when processing input


  


  Here is complete ffmpeg output for reference

  


      Command execution failed with rc=1 and the output below.
Command execution failed ffmpeg version v4.3-dev-2955 Copyright (c) 2000-2020 the FFmpeg developers
      built with Android (6454773 based on r365631c2) clang version 9.0.8 (https://android.googlesource.com/toolchain/llvm-project 98c855489587874b2a325e7a516b99d838599c6f) (based on LLVM 9.0.8svn)
      configuration: --cross-prefix=aarch64-linux-android- --sysroot=/home/amit/Android/Sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/amit/work/mobile-ffmpeg/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --cc=aarch64-linux-android21-clang --cxx=aarch64-linux-android21-clang++ --target-os=android --enable-neon --enable-asm --enable-inline-asm --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --disable-openssl --disable-xmm-clobber-test --enable-debug --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-static --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --d  libavutil      56. 42.102 / 56. 42.102
      libavcodec     58. 78.102 / 58. 78.102
      libavformat    58. 42.100 / 58. 42.100
      libavdevice    58.  9.103 / 58.  9.103
      libavfilter     7. 77.101 /  7. 77.101
      libswscale      5.  6.101 /  5.  6.101
      libswresample   3.  6.100 /  3.  6.100
    [concat @ 0x7bd7d14400] Impossible to open 'absolute path here/1.mp4'
    absolute path here/files.txt: Invalid data found when processing input
Command execution 7


  


  Exact same command works when I compile complete ffmpeg. What components I might be missing for getting this error ? Help is appreciated.

  


• 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