Sur d’autres sites (3596)

• FFmpeg reversing a huge mp4 video [closed]

  30 août 2024, par Douglas E Knapp

  I did something dumb. I rendered a long video in blender backwards !
Ya, the actors are moving in reverse. The sound is normal.
The easy way to fix this is

  


  ffmpeg -i originalVideo.mp4 -vf reverse reversedVideo.mp4


  


  but that uses up all the memory in my manjaro computer and crashes ffmpeg. :-(
So how can I do this ? I am open to using other software but this way seemed best.
Thanks !

  


• How to deinterlace and encode with hevc_nvenc(10bit) using ffmpeg

  25 juin 2020, par acklack

  I am trying to deinterlace a mpeg2ts video and encode it with hevc_nvenc(10bit) by ffmpeg, but it does not work.

  


  Please tell me how to solve it.

  


  ffmpeg

  


  $ ffmpeg
ffmpeg version N-98246-g157feea Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix= --pkg-config-flags=--static --extra-cflags=-I/include 
--extra-ldflags=-L/lib --extra-libs='-lpthread -lm' --bindir=/bin --enable-gpl 
--enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-static --enable-cuda 
--enable-cuvid --enable-nvenc --enable-cuda-sdk --enable-libnpp 
--extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --enable-nonfree


  


  Failure

  


  #1 (-deint)

  


  

  • Success:deinterlacing, Failure : 10bit

  


  


  ffmpeg -y -hide_banner -fflags +discardcorrupt \
    -hwaccel cuda -c:v mpeg2_cuvid -hwaccel_output_format cuda \
    -deint adaptive -drop_second_field 1 \
    -i in.m2ts \
    -c:v hevc_h265 -pixel_format nv12 -profile:v main10 -level:v 4.1 -preset slow \
    -c:a copy -bsf:a aac_adtstoasc \
    out.mp4


  


  #2 (-deint)

  


  

  • Success:10bit, Failure:deinterlacing

  


  


  ffmpeg -y -hide_banner -fflags +discardcorrupt \
    -deint adaptive -drop_second_field 1 \
    -i in.m2ts \
    -c:v hevc_h265 -pix_fmt yuv420p10le -profile:v main10 -level:v 4.1 -preset slow \
    -c:a copy -bsf:a aac_adtstoasc \
    out.mp4


  


  #3 (yadif_cuda)

  


  

  • Success:deinterlacing, Failure : 10bit

  


  


  ffmpeg -y -hide_banner -fflags +discardcorrupt \
    -hwaccel cuda -c:v mpeg2_cuvid -hwaccel_output_format cuda \
    -i in.m2ts \
    -vf "yadif_cuda" \
    -c:v hevc_h265 -pixel_format nv12 -profile:v main -level:v 4.1 -preset slow \
    -c:a copy -bsf:a aac_adtstoasc \
    out.mp4


  


• How to properly link ffmpeg project in eclipse linux

  23 juin 2015, par user3177342

  I have a little test project on linux eclipse using ffmpeg.
  It is oke to make it using command line

  g++ -o m_vector -I/usr/include -I/usr/local/include m_vector.cpp -lavformat -lavcodec -lavutil -lm -lz -lva -lpthread

  but in eclipse while linking i get a big list of errors

  /home/user/projects/ffmpeg/libavcodec/internal.h:194: undefined reference to `av_rescale_q'
  
  /usr/local/lib/libavcodec.a(mpegvideo.o): In function `update_picture_tables':
  
  /home/user/projects/ffmpeg/libavcodec/mpegvideo.c:663: undefined reference to `av_buffer_unref'
  
  /home/user/projects/ffmpeg/libavcodec/mpegvideo.c:663: undefined reference to `av_buffer_ref'
  
  /home/user/projects/ffmpeg/libavcodec/mpegvideo.c:664: undefined reference to `av_buffer_unref'
  
  /home/user/projects/ffmpeg/libavcodec/mpegvideo.c:664: undefined reference to `av_buffer_ref'
  
  /home/user/projects/ffmpeg/libavcodec/mpegvideo.c:665: undefined reference to `av_buffer_unref'
  
  /home/user/projects/ffmpeg/libavcodec/mpegvideo.c:665: undefined reference to `av_buffer_ref'

  and so on

  I’ve aded the needed libs in project and i use "extern c". My project knows also about needed includes. Digging internet did not give the answer.