Recherche avancée

Sur d’autres sites (5648)

• DrawText and crossfade effect - ffmpeg

  22 juillet 2018, par Geek

  I have one video with crossfade effect and i want add text on this video (drawtext).
  However when i add a filter text, he remove a crossfade effect in the final video.

  Command to create video with crossfade effect :

  ffmpeg -i first.mp4 -i second.mp4 -filter_complex 
  
      "[0:v]trim=start=0:end=2,setpts=PTS-STARTPTS[0_clip_1];
  
      [0:v]trim=start=2:end=3,setpts=PTS-STARTPTS[fadeoutsrc_0];
  
      [fadeoutsrc_0]format=pix_fmts=yuva420p,fade=t=out:st=0:d=1:alpha=1[fadeout_0];
  
      [fadeout_0]fifo[fadeoutfifo_0];[1:v]trim=start=1,setpts=PTS-STARTPTS[1_clip_2];
  
      [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc_1];
  
      [fadeinsrc_1]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1[fadein_1];
  
      [fadein_1]fifo[fadeinfifo_1];
  
      [fadeoutfifo_0][fadeinfifo_1]overlay[crossfade_1];
  
      [0_clip_1][crossfade_1][1_clip_2]concat=n=3[output];[0:a][1:a] acrossfade=d=1 [audio]" 
  
  -map "[output]" -map "[audio]" videoWithCrossfade.mp4

  Command to add filter text :

  ffmpeg -i videoWithCrossfade.mp4 -filter_complex 
  
      "/Windows/fonts/arial.ttf':text='hello world!':fontcolor=white:fontsize=40:box=1:boxcolor=red
  
      @0.5:boxborderw=10:x=500:y=500"
  
      output.mp4

  this is the link of video : http://www.mediafire.com/file/kw3lvdb2rp1bs6u/videoWithCrossfade.mp4/file
  http://www.mediafire.com/file/iycdzozsqzosq87/output.mp4/file

  Thanks for your help !

• FFMPEG output to the Exact Folder using Python

  6 août 2021, par Ande Caleb

  i'm working on a simple script using ffmpeg, to reduce the size of a video and add watermark to the video, then move the final output into the compressed folder... this is my script.

  


  the compression works, the watermark works, but the issue i'm having is that the final output is placed in the root folder, and not in the compressed folder... below i my folder structure and my scripts

  


  Folder Structure

  


     rootfolder
    |
    |--media
       |--vids
          |--(video files, mov, mp4s)..
       |--compressed
    |--encode.py


  


  Script (encode.py) file

  


  import os    
import subprocess
from pathlib import Path


dir_path = os.path.dirname(os.path.realpath(__file__))    
vidfile = dir_path + '/media/vids/mv1.mov'    
watermark = dir_path + '/media/watermark.png'
compressed = str(Path.cwd() / '/media/compressed/')

# 1. compress the video and store it in the media out folder

media_out = str(dir_path + "/compressed_mv1s.mov").replace(" ", "\\ ") 
subprocess.run("ffmpeg -i " + vidfile.replace(" ", "\\ ") +
               " -vcodec libx264 -crf 22 " + media_out, shell=True)  

#2.add watermark to the video and move it to the compressed folder 

media_watermarked = str(compressed + '/w_mv1.mov').replace(" ", "\\ ")
subprocess.run("ffmpeg -i " + media_out + " -i " + watermark +
               " -filter_complex \"overlay=main_w-(overlay_w+10) : main_h-(10+overlay_h)\" " + media_watermarked, shell=True)


  


  in summary, compressing the video works, adding watermark works, but the last line, the error is from the media_watermarked variable, i'm not sure what i'm doing wrong but it isn't resolving the folder correctly moving the final output to the folder.. this is the error i get

  


  

  


  Also, how can i run two ffmpeg commands concurrently to compress the video and add watermark at once without doing it seperately.
Thanks.

  


• avcodec : add AV_CODEC_ID_IVTV_VBI

  14 décembre 2024, par Scott Theisen

  avcodec : add AV_CODEC_ID_IVTV_VBI
  IVTV, a Linux driver for TV tuners, and V4L2 utilize
  
  a coding named after IVTV to carry sliced VBI data
  
  in MPEG streams produced by tuner cards with
  
  VBI capture capability and an MPEG-2 encoder SoC.
  IVTV or V4L2 driver will transport the coded data into a
  
  MPEG-PS private stream ("IVTV") that can be captured
  
  from the card alongside the video/audio.
  The data could include :
  
  EIA-608, Teletext, WSS (PAL widescreen signaling),
  
  or VPS (PAL VCR signaling).
  Signed-off-by : Marth64 <marth64@proxyid.net>
  

  • [DH] doc/APIchanges
  • [DH] libavcodec/codec_desc.c
  • [DH] libavcodec/codec_id.h
  • [DH] libavcodec/version.c