FFmpeg h264 to WebM VP9 encoding comparison part 1
In this part 1 see FFmpeg encoding speed, fps, size and bitrate for an h264 MP4 video file to VP9 WebM using -deadline good with -crf values 15-30 and -cpu-used…
Tag: FFmpeg
MP4 to VP9 WebM encoding with FFmpeg
WebM the modern video container encoded by libvpx-vp9 or VP9 for short, handles differently to h264 when encoding with FFmpeg. Here is a shorter guide derived from the FFmpeg VP9…
Speed up and slow down video with FFmpeg
How to speed up or slow down video using FFmpeg. -filter:v “setpts=” Is the method to achieve this. The documentation states that for fast motion: -filter:v setpts=0.5*PTS Slow motion: -filter:v setpts=2.0*PTS In…
Automatically overwrite file if already exists with FFmpeg
Automatically overwrite a file if already exists with FFmpeg by using -y which means overwrite files without asking: ffmpeg -i input.mp4 -c:v libx264 -crf 25 -preset fast -y output.mp4 The…
Making a video from an image and MP3 file with FFmpeg
Creating a video from an image and audio file with FFmpeg can be achieved in many different ways, but let’s keep it super simple: ffmpeg -loop -1 -y -i theimage.jpg…
Understanding FFmpeg map with examples
Map in FFmpeg can be best understood as selecting streams within a file you want to encode, keep or remove when creating an output. -map is the command. Streams means…
FFmpeg saving stream in intervals with date time as filename
This is how to save a video stream in 60 second intervals with the current date and time as the filename using FFmpeg. Putting the saved stream into segments means…
Vertical video encoding; Does it matter?
Vertical video is a video that is higher than it is wide and is made for viewing on vertical screens which basically just means made of viewing on phones. Because…
FFmpeg encode percentage progress bar with PHP
Using an HTML progress bar to view FFmpeg video encode progress percentage, With the usage of Ajax and PHP to parse the FFMpeg output file. This method enables a web-based…
Adding audio to a video file with FFmpeg
Adding an audio file to a video with FFmpeg, this is achieved with mapping. The key to this is mapping. Video files can contain more than just a video and…