Recherche avancée

Sur d’autres sites (5731)

• avcodec/nvenc : add UHQ to AV1 for NVENC

  8 janvier, par Diego de Souza

  avcodec/nvenc : add UHQ to AV1 for NVENC
  This commit adds support for Ultra High Quality mode for AV1 on
  
  NVIDIA GPUs.
  Signed-off-by : Diego de Souza <ddesouza@nvidia.com>
  
  Signed-off-by : Timo Rothenpieler <timo@rothenpieler.org>
  

  • [DH] libavcodec/nvenc.h
  • [DH] libavcodec/nvenc_av1.c

• ffmpeg output 0 second with wrong coordinates and hidden text

  18 juillet 2023, par Abdullah Mohamed

  I'm trying to add some Text and Images to the video

  


  Code

  


  -i 'input.MOV' -i 'image.jpg'         -filter_complex "[0]crop=1181.25:2100.0:1089.375:0.0[v];
          color=black[c];
          [v]colorchannelmixer=0.39:0.769:0.189:0:0:0.349:0.686:0.168:0:0:0.272:0.534:0.131:0:0:0:0:0[v];
          [c][v]scale2ref[t][v];
          [t]setsar=1,
          colorkey=black,
          split=2[t1][t2];
                  [t1]drawtext=
          text=Abdullah Muhammad T1
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#2196f3
          :fontcolor=#f44336,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=400.0:y=300.0:shortest=1[v],
          
          
                  [t2]drawtext=
          text=Abdullah Muhammad T2
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#ffeb3b
          :fontcolor=#000000,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=-90.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=30.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=200.0:y=600.0:shortest=1
          
          
          " -c:a copy -preset ultrafast -y 'output.mp4'


  


  My Issues

  


  

  1. First image should be at 0,0 coordinates but it's not.

  


  2. There should be 2 Texts but 1 of them is hidden and the other is not fully shown.

  


  3. the video is 13 seconds and the output is only 0 second.

  


  


  Expected

  


  


  Texts should be shown and images should be in the right position and video output should be 13 seconds.

  


  


  Actual


  


  Another issue

  


  


  If I trimmed the video the output will still be the same duration

  


  


  -i 'input_video.MOV' -ss 0:00:00.000000 -t 0:00:16.216000 -i 'input_image.jpg'         -filter_complex "[0]crop=1181.25:2100.0:1089.375:0.0[v];
          color=black[c];
          [v]colorchannelmixer=0.39:0.769:0.189:0:0:0.349:0.686:0.168:0:0:0.272:0.534:0.131:0:0:0:0:0[v];
          [c][v]scale2ref[t][v];
          [t]setsar=1,
          colorkey=black,
          split=2[t1][t2];
                  [t1]drawtext=
          text=Abdullah Muhammad T1
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#2196f3
          :fontcolor=#f44336,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=400.0:y=300.0:shortest=1[v],
          
          
                  [t2]drawtext=
          text=Abdullah Muhammad T2
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#ffeb3b
          :fontcolor=#000000,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=-90.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=30.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=200.0:y=600.0:shortest=1
          
          
          " -c:a copy -preset ultrafast -y 'output.mp4'


  


• How do you replace audio at a given timestamp with ffmpeg ?

  29 août 2022, par Ed George

  I am trying to use the ffmpeg library to take two FLAC files and replace the audio in File A with the audio in File B at a given timestamp.

  



  For example if File B was to be played at 00:02 and was a second long, playing the output it would be (00:00-0:01) File A Audio -> (00:02-0:03) File B Audio -> (00:04-...) File A Audio

  



  To do this, I have tried the following

  



  ffmpeg -y -i original.flac -i replacement.flac -acodec copy -ss 2 -to 3 -write_xing 0 result.flac


  



  But this only produces the original audio between the specified timestamps.

  



  Is there any way to achieve this within ffmpeg ?