Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• OpenCV conda installation (missing ffmpeg) - Windows

  12 février 2017, par FZNB

  I managed to install OpenCV 3.1 using conda and Python 3.5 and everything seems to work fine.

  However, when trying to import a video file via ffmpeg I get this:

  import numpy as np
  import cv2
  
  cap = cv2.VideoCapture('data\vtest.avi')
  cap.read()
  
  #(False, None)
  

  When using still images or my laptop webcam it works (notice that the VideCapture returns None). Obviously, something is wrong with ffmpeg.

  I have tried a couple of things:

  1. Install ffmpeg binaries in my environment/PATH (works fine separately but apparently OpenCV cannot call it since it looks for specific dlls).

  2. Move to the bin folder (which is in my path as well) the dlls from the compiled version in sourceforge:

     opencv_ffmpeg310_64.dll

     opencv_ffmpeg310.dll

  Neither of the two options worked. Any ideas?

• Can ffmpeg burn in time code ?

  12 février 2017, par spinon

  I have a need to burn in a time code to a video and am wondering if this is something that ffmpeg is capable of?

• How to convert WAV to FLAC/AMR in server-side javascript ? [on hold]

  12 février 2017, par Phil Andrews

  I need to process audio for transcription through a node server. The server receives the audio in WAV format and saves it to a temp file. From there it needs to be converted to FLAC/AMR in order to process it. How can this be accomplished?

  WAV in -> FLAC/AMR out ->

• How to resize a picture using ffmpeg's sws_scale() ?

  12 février 2017, par cyh24

  I wanna resize a picture by using the ffmpeg's func--->sws_scale().

  Is there any one knows how to do it?

  Do you have the source code for this function?

• FFMPEG (BASH) Trying to record stream from IP camera, getting really bad framerates and random stuttering in video

  12 février 2017, par user2419553

  I'm trying to record an .asf from my IP camera using FFMPEG to save it as an .mp4 file every 15 minutes. The stream coming from the camera is variable, but averages at around 10 FPS. However, when I watch the output mp4, the framerate is much lower, and there is often stuttering, random frame skips, and sometimes the video freezes and doesn't play (on VLC player).

  Is there any way I can make the recording smoother and/or have less stuttering?

  Here is the code that I use:

  ffmpeg -i http://USER:PASSWORD@IP:PORT/videostream.asf -r 10 -vcodec copy -an -t 900 /root/Record/"$(date +"%Y_%m_%d %I.%M %p")".mp4
  

  Any help would be appreciated.