Articles tagged with "video"

1. Video manipulation with ffmpeg

   Serveral useful recipes for manipulation video with ffmpeg.

   Note that a name within angle brancket (like <this>) represents a generic input or output file.

   Extracting raw audio

   The following recipe extracts the audio from a video file and converts it to WAV format.

   ffmpeg -y -hide_banner -i <input> -vn -c …

2. vid2mkv

   My digital camera can also produce movies, like most camera’s these days. It saves them in AVI format, with relatively poor mjpeg compression and uncompressed sound.

   So I wrote this python script to convert these AVI files to Theora / Vorbis streams in a matroška container. It takes the video …

3. vid2mp4

   Videos with H.264 video and AAC sound im MP4 containers seem to strike a very good size performance balance. So I modified a copy of vid2mkv to use ffmpeg to create this kind of files instead.

   To speed up the processing of multiple files, this script runs the conversions …

4. Using Matroška containers for videos

   

   Note

   After using ffmpeg2theora and mkvtoolnix for a while (see also the previous installment) to re-encode videos into Theora video and Vorbis audio tracks encapsulated into the matroška container format, I found an easier way using ffmpeg. This article was updated to reflect that.

   An example of the commands used …

5. Open source video encoding with Ogg Theora and Vorbis

   The open source software Theora video codec, can together with the Vorbis audio codec and the Ogg container format produce very small files with good quality.

   

   Most high-performance video codecs are encumbered with patents. Not so long ago, a new version of the Theora video codec was released with improved …