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• Bash script to text watermark video from filename (ffmpeg)

  13 juin 2016, par Yian

  I would like to automate some text to be ’watermarked’ on my videos. Basically I want to create a marker in my file names (eg "&&"). Then I want the script to take the content after "&&" and place it in the "drawtext" content.

  For example, file named "Video2132 && The First Test" would make the part after "text=" become "The First Test".

  The below code works fine without the drawtext part.

  As soon as I add that function, the script runs, but it creates empty video files (zero bytes).

  for f in ./*.mov; do
  
      printf '%s\n' "Doing stuff with: ${f}"
  
  
  
      i='0'
  
      while (( i <= 5 )); do
  
          ffmpeg -ss "$(( i * 25 ))" -t 25 -i "${f}" -acodec copy -vf drawtext="fontfile=/Users/mac1/Library/Fonts/Gillsanslight.ttf: \
  
  text='Stack Overflow': fontcolor=white: fontsize=24: box=1: boxcolor=black@0.5: \
  
  boxborderw=5: x=(w-text_w)/2: y=(h-text_h)/2" -codec:a copy "${f%.mov}.${i}.mov" -loglevel quiet
  
          (( i++ ))
  
      done
  
  done

• How to record (and process ?) a video that is streamable from Android

  13 mai 2016, par afollestad

  My company’s app relies heavily on video recording and playback of web-based videos. I use the MediaRecorder API to record videos, through this library designed by me : https://github.com/afollestad/material-camera.

  For playback, I use this library which is basically a wrapper around Google’s ExoPlayer library : https://github.com/brianwernick/ExoMedia.

  It works fine for the most part with small videos, especially if I decrease bit rates for audio and video. However, larger and higher quality videos have many issues. Sometimes they seem to buffer forever, sometimes playback doesn’t even start successfully, etc. Again, these videos are being streamed over HTTP from Amazon S3.

  ---

  I’ve read a little bit about FFMPEG, and how it can process MP4’s for "faststart", splitting the files into chunks for DASH, etc. However, FFMPEG solutions for Android seem a bit complex, so...

  Is there anyway to record MP4’s from Android, with MediaRecorder, MediaCodec, or some other API which results in a video file that is fast to stream ? It amazes me how well Snapchat has figured this out.

• Using Python to make a terminal-based YouTube audio streamer

  11 août 2015, par Tyson Berry

  I want to make a terminal-based program that streams YouTube audio for easy listening to music. I’m aware that I’d have to use a converter like ffmpeg to extract the mp3 audio and an audio player like Foobar2000, I’m just unsure how to make it all work together.

  I have an idea for commands etc which is here. (Excuse my crude use of MS Paint)

  As you can see yap (YouTube Audio Player, a working title) is the command used in front of a YouTube URL to tell the program what video to fetch. It then fetches the title of the video from the YouTube page’s source, which is listed in a text file on the desktop along with the URL. The song is then loaded and played through the audio player which is displayed in the terminal using the song time. When the song has ended, you can see the user has typed list. List opens up the list on the desktop, which displays all the songs previously entered in the program. The user can then select a number and play the corresponding song from the list.

  I have found this, which is outdated yet relevant.