Advanced search

On other websites (10729)

• mov: Export geotag metadata fields

  3 June 2014, by Martin Storsjö

  mov: Export geotag metadata fields
  The ’?xyz’ form is used by android devices (and according to apple
  
  mailing list archives, also by older iOS devices). The ’loci’ field
  
  (defined in 3GPP 26.244) is used by recent iOS devices.
  Even though the loci field can contain an altitude, it was plain
  
  0 in my sample. Just export longitude and latitude, in a string
  
  format matching the one used by the ’?xyz’ metadata field.
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DBH] libavformat/mov.c

• Try to execute ffmpeg in python - subtitles error

  3 September 2022, by user103162

  I try to exectute :
./ffmpeg.exe -i "video.mkv" -vf subtitles="video.mkv" "video.mp4"
This command works fine

  


  But not in my python code

  


  
from pathlib import Path
import subprocess
import os


ffmpeg = r"D:\Archives\ffmpeg.exe"
os.chdir(r"D:\temp\video")
videos = Path(".")

for file_mkv in videos.glob("*.mkv"):
    file_mp4 = file_mkv.with_suffix(".mp4")
    subprocess.run([ffmpeg, "-i", file_mkv, "-vf", f'subtitles="{file_mkv}"', file_mp4])



  


  Error :
[Parsed_subtitles_0 @ 0000020cb26222c0] Unable to open "video.mkv"
[AVFilterGraph @ 0000020cb715a380] Error initializing filter 'subtitles' with args '"video.mkv"'
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
Conversion failed!

  


• Silence Quiet Audio Sections Using ffmpeg

  17 September 2020, by Suuuehgi

  I would like to silence silent audio passages — noise suppression — using ffmpeg on the go. That is: Inject silence when the volume is below x dB (the perfection would be a smooth transition).

  


  I had a look at silenceremove and silencedetect but that either cuts or requires a multi-step process.

  


  I also had a look at the dcshift filter but that led nowhere as well.

  


  Any ideas?