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• Looking for a solution to my ffmpeg video overlay code :

  16 mars 2018, par Michael Hovan

  Looking for a solution to my ffmpeg video overlay code :

  import subprocess as sp
  
  
  
  cmd='ffmpeg', '-i', 'C:/Users/Michael.hovan/Desktop/test/front.mov', '-i', 'C:/Users/Michael.hovan/Desktop/test/persp.mov', '-i', 'C:/Users/Michael.hovan/Desktop/test/side.mov', '-i', 'C:/Users/Michael.hovan/Desktop/test/top.mov', '-filter_complex' \
  
   '[1:v]scale=iw/4:-1:flags=lanczos[pip1];' \
  
   '[2:v]scale=iw/4:-1:flags=lanczos[pip2];' \
  
   '[3:v]scale=iw/4:-1:flags=lanczos[pip3];' \
  
   '[0:v][pip1]overlay=main_w-overlay_w-10:main_h-overlay_h-10[bg1];' \
  
   '[bg1][pip2]overlay=(main_w-overlay_w)/2:main_h-overlay_h-10[bg2];' \
  
   '[bg2][pip3]overlay=10:main_h-overlay_h-10,format=yuv420p[v];' \
  
   '[0:a][1:a][2:a][3:a]amerge=inputs=4[a]' \
  
  '-map', '[v]', '-map', '[a]', '-ac', '1', 'C:/Users/Michael.hovan/Desktop/test/output.avi'
  
  
  
  sp.call(cmd)

  I’m honestly stumped as to why the code is giving me a "returned non zero exit status".

• FFmpeg transfer from bad media

  31 décembre 2017, par TheSavo

  I have an SDcard that has two videos recorded from an old phone. The media is bad and I have already run SpinRite and chkdsk, to fix the errors. The files still fail to copy completely.

  I can play some portion of the files in VLC player. It plays about as far as File copy and TeraCopy before the copy job fails.
  They and MP4 files. I would like to use ffmpeg to transfer the portion of the video that will play out. is -i the best parameter ?

  ffmpeg -i H:\badfile.mp4 e:\portion.mp4

  Here is the output from mediainfo if that helps

  Complete name                            : H:\DCIM\badfile.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/3gp4)
File size                                : 422 MiB
Duration                                 : 3 min 46 s
Overall bit rate                         : 15.6 Mb/s
Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 1 Ref Frames
Format settings, CABAC                   : Yes
Format settings, RefFrames               : 1 frame
Format settings, GOP                     : M=1, N=61
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 3 min 45 s
Bit rate                                 : 15.5 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 19.469 FPS
Minimum frame rate                       : 14.085 FPS
Maximum frame rate                       : 30.303 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.385
Stream size                              : 418 MiB (99%)
Title                                    : VideoHandle
Language                                 : English
Encoded date                             : UTC 2013-09-17 13:18:06
Tagged date                              : UTC 2013-09-17 13:18:06
mdhd_Duration                            : 225892

  Audio
  ID : 2
  Format : AAC
  Format/Info : Advanced Audio Codec
  Format profile : LC
  Codec ID : mp4a-40-2
  Duration : 3 min 46 s
  Bit rate mode : Constant
  Bit rate : 128 kb/s
  Nominal bit rate : 96.0 kb/s
  Channel(s) : 2 channels
  Channel positions : Front : L R
  Sampling rate : 44.1 kHz
  Frame rate : 43.066 FPS (1024 SPF)
  Compression mode : Lossy
  Stream size : 3.46 MiB (1%)
  Title : SoundHandle
  Language : English
  Encoded date : UTC 2013-09-17 13:18:06
  Tagged date : UTC 2013-09-17 13:18:06

• ffmpeg clip audio interval with starting and end time

  27 novembre 2018, par Raymond Huang

  I am trying to clip an MP3 between two starting points, like starting at 10 seconds and ending at 16 seconds (time interval of 6 seconds).

  I am using this command :

  ffmpeg -ss 10 -i input.mp3 -t 6 output.mp3

  The resulting output.mp3 contains the 6 seconds that I specified followed by 8 or 9 seconds of empty audio. Is there something wrong with my command ?

  Edit :

  ffmpeg -ss 10 -t 6 -i input.mp3 output.mp3 says -t is not an input option, keeping it for the next output; consider fixing your command line. and gives me a file that’s got 8 seconds of audio starting from 10s and then some 9 or 10 seconds of silence.

  ffmpeg -ss 10 -to 16 -i input.mp3 output.mp3 produces a file that is twice the length of the original - basically the same audio file repeated again.

  Testing the output :

  I used Quicktime and it has silent audio at the end. The description of the output file in finder says like 14 seconds. When I use VLC, it plays for the correct 6 seconds and stops, even though its duration in the file browser in VLC says 14. My MPlayer doesn’t work properly. I also did the preview audio in Finder, and it plays the 6 seconds properly and then stops. But the round seeker bar of the MP3 didn’t reach the end. And it also says 14 seconds instead of 6.

  My goal is to stream this 6 second file through a REST API to the front end. I want the user to be able to download this file properly. Ideally it won’t have inconsistent metadata (14 seconds instead of 6).