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• How to batch watermark videos with FFMPEG on a Mac [closed]

  12 août 2020, par analogvids

  I've seen a lot of code for scripts to batch convert and to batch watermark videos with FFMPEG but these are largely guides for windows. I need to know how to do this on a Mac. I've successfully written and run a shell script to batch convert videos :

  


  for i in *.Avi; do ffmpeg -i "$i" -c:a aac -b:a 128k -c:v libx264  -preset veryslow "${i%}.mp4"; done)


  


  I have also successfully run a command to convert and watermark videos individually :

  


  ffmpeg -i test.MOV -i watermark.png -filter_complex "overlay=100:100" watermarked.mp4


  


  I consistently get a syntax error when trying to combine these commands to create a script for batch watermarking. I do not need to batch convert in the same command, though having that option would be nice. Any guidance would be greatly appreciated.

  


  for clarification, this is the script i created :

  


  # !/bin/bash for i in *.MOV ; do ffmpeg -i "$i" -i watermark.jpeg -filter_complex “overlay=0” ”$I%.mp4" ; done

  


  and this is the error message terminal spits out : ./batchwatermark10.sh : line 3 : unexpected EOF while looking for matching `"' ./batchwatermark10.sh : line 4 : syntax error : unexpected end of file

  


  Thanks !

  


• Slow seek in MKV videos with FFmpeg C/C++

  14 juin 2019, par Igor

  Seeking in any large MKV H.264 video works very slow.

  Call of av_seek_frame() in my code using FFmpeg LibAV takes about 3-10 seconds to jump to a middle position in 1-2 hours video.

  I tried all combinations of flags : AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE, AVSEEK_FLAG_ANY, AVSEEK_FLAG_FRAME

  However VLC seeks very fast in same MVK videos.

  Seeking in MP4 H.264 works instantly. The problem is only with MKV.

  Latest FFmpeg 4.1.3.

• How can I download videos from reddit using praw

  9 octobre 2023, par rabbibillclinton

  So I want to download videos from reddit, I've seen projects on github but I'm very new to python and don't know how it works, if someone could explain I'd appreciate it, I found this project It works but it seperates audio and video and I want it all in one, I think you can combine those using ffmpeg but I don't know how that works either, also how do I configure some of this stuff like where the videos save and quality, here's my code.

  


  from redvid import Downloader
import praw

reddit = praw.Reddit(client_id = "a", client_secret = "b", user_agent = "c")

subreddit = reddit.subreddit("learnpython")
hot = subreddit.hot(limit=5)

downloader = Downloader(max_q=True)

for submission in hot:
    downloader.url = submission.url
    reddit.download()