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• Revision e9b586e21b : Removal of legacy zbin_extra / zbin_oq_value. zbin extra / zbin_oq_value was wi

  17 décembre 2014, par Paul Wilkins

  Changed Paths :
   Modify /test/vp9_quantize_test.cc

  
   Modify /vp9/common/vp9_rtcd_defs.pl

  
   Modify /vp9/encoder/arm/neon/vp9_quantize_neon.c

  
   Modify /vp9/encoder/vp9_block.h

  
   Modify /vp9/encoder/vp9_dct.c

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encodemb.c

  
   Modify /vp9/encoder/vp9_quantize.c

  
   Modify /vp9/encoder/vp9_quantize.h

  
   Modify /vp9/encoder/x86/vp9_dct_sse2.c

  
   Modify /vp9/encoder/x86/vp9_dct_ssse3.c

  
   Modify /vp9/encoder/x86/vp9_highbd_quantize_intrin_sse2.c

  
   Modify /vp9/encoder/x86/vp9_quantize_sse2.c

  
  
  Removal of legacy zbin_extra / zbin_oq_value.

  zbin extra / zbin_oq_value was widely passed around,
  hence removal touches a lot of code.

  Change-Id : Idc94359735b60c38a160e4385ae09d5ca8b6b8e5

• Moviepy subclip captures extra 4 seconds at the end

  18 juillet 2021, par Fazal

  Iam trying to clip a video and save the clipped video. In this case the first 5 seconds of the video. While the video is getting clipped correctly. However the length of the clipped video is still 9 seconds instead of 5 seconds. For some reason an addition 4 seconds keep getting added with no content. Can someone help me with this. I tried to read through various topics on the issue but couldnt figure out.

  


  # Import everything needed to edit video clips
from moviepy.editor import *
from moviepy.video.io.ffmpeg_tools import ffmpeg_extract_subclip
# loading video dsa gfg intro video
clip = VideoFileClip("file.mp4")

filename = "fileclipped.mp4"
ffmpeg_extract_subclip("file.mp4", 0, 5, targetname=filename)


  


• ffmpeg produces extra frames after halving the framerate

  22 septembre 2022, par Korfoo

  I have a question about halving the framerate of a video using ffmpeg.
I have an input video with a framerate of 50fps and 6410 frames, ffprobe output :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : M4V 
    minor_version   : 1
    compatible_brands: isomavc1mp42
    creation_time   : 2022-06-24T14:27:43.000000Z
  Duration: 00:02:08.20, start: 0.000000, bitrate: 12595 kb/s
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 12202 kb/s, 50 fps, 50 tbr, 50k tbn, 100 tbc (default)
    Metadata:
      creation_time   : 2022-06-24T14:27:43.000000Z
      handler_name    : ETI ISO Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : Elemental H.264
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 384 kb/s (default)
    Metadata:
      creation_time   : 2022-06-24T14:27:43.000000Z
      handler_name    : ETI ISO Audio Media Handler
      vendor_id       : [0][0][0][0]


  


  I want to change this to 25fps using the following ffmpeg command :

  


  ffmpeg -i input.mp4 -filter:v fps=25 25fps.mp4 


  


  One would expect the amount of frames in the output to be half the frames of the input file, 3205. But this transcode results in 3206 frames.

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '25fps.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.76.100
  Duration: 00:02:08.24, start: 0.000000, bitrate: 3053 kb/s
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2917 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : ETI ISO Video Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 129 kb/s (default)
    Metadata:
      handler_name    : ETI ISO Audio Media Handler
      vendor_id       : [0][0][0][0]


  


  How does this happen and why is there a frame extra ?