ffmpeg is basically a very fast video and audio converter. It can grab from a live audio/video source. It can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter. ffmpeg reads from an arbitrary number of input “files” and writes to an arbitrary number of output “files”, which are specified by a plain output url.
How to install it in linux?
To install it in Linux - ubuntu, open the /etc/apt/sources.list file and add below lines and save the file.
deb http://ftp.uk.debian.org/debian jessie-backports main
Then update and install ffmpeg using below commands.
$ sudo apt-get update
$ sudo apt-get install ffmpeg
Here are few useful commands I tried using ffmpeg.
FFmeg syntax
ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Converting a yuv/raw video to MP4 video
For NV21 raw video,
ffmpeg -f rawvideo -vcodec rawvideo -s 352x288 -r 25 -pix_fmt nv21 -i sample_cif_nv21.yuv -c:v libx264 -preset slow -qp 0 sample_cif.mp4
For yuv420p raw video,
ffmpeg -f rawvideo -vcodec rawvideo -s 352x288 -r 25 -pix_fmt yuv420p -i sample_cif_yuv420p.yuv -c:v libx264 -preset slow -qp 0 sample_cif.mp4
where,
| option | Description |
|---|---|
| -f fmt | force format |
| -vcodec codec | force video codec (‘copy’ to copy stream) |
| -i | infile |
| -c codec | codec name |
| -f fmt | force format |
| -f fmt | force format |
| -r rate | set frame rate (Hz value, fraction or abbreviation) |
| -s size | set frame size (WxH or abbreviation) |
| -pre preset | preset name |
| -qp | quality 0 is best, 51 |
FFmpeg on Android
FFMPEG support for android is available in the below link.