FFmpeg

FFmpeg is a free and open-source software suite for handling multimedia data. It is widely used for recording, converting, streaming, and processing audio and video content. FFmpeg supports a vast range of codecs, formats, and filters, making it one of the most powerful and versatile tools in multimedia production and post-processing.

The project was started in 2000 by Fabrice Bellard and is actively maintained by a global community of developers. FFmpeg is available on most major platforms, including Linux, Windows, and macOS.

Features

Format conversion — Convert between nearly all audio and video formats (e.g., MP4, MKV, AVI, MOV, MP3, FLAC, etc.).
Codec support — Built-in support for popular video/audio codecs like H.264, H.265 (HEVC), VP9, AV1, AAC, MP3, Opus, and more.
Streaming — Transmit live audio and video over protocols like RTMP, RTP, HTTP, HLS, and DASH.
Transcoding — Compress or re-encode media to reduce file size or match device requirements.
Filtering — Apply visual filters, effects, cropping, scaling, subtitles, watermarks, and more.
Recording — Capture video from webcams, screens, or network streams.
Metadata editing — View and modify media file metadata.
Batch processing — Automate media processing tasks via scripts or cron jobs.

Command-Line Syntax

FFmpeg operates via the command line. A basic conversion command:

ffmpeg -i input.mp4 output.avi

This command converts an MP4 video to AVI format using default codecs.

Extract audio from a video:

ffmpeg -i input.mp4 -vn -acodec copy audio.aac

Resize a video:

ffmpeg -i input.mp4 -vf "scale=1280:720" output.mp4

Convert video to H.265 with CRF quality control:

ffmpeg -i input.mp4 -c:v libx265 -crf 28 output.mp4

Hardware Acceleration

FFmpeg supports hardware-accelerated encoding and decoding, which offloads video processing from the CPU to fixed-function hardware on the GPU or processor. This reduces transcoding time and CPU load substantially, especially for high-resolution content like 4K HEVC.

Intel Quick Sync Video (VAAPI)

On Linux, Intel CPUs with integrated graphics (HD Graphics, UHD Graphics, or Iris) expose hardware encode/decode through VAAPI (Video Acceleration API). FFmpeg supports VAAPI natively.

To transcode a video using VAAPI hardware acceleration:

ffmpeg -vaapi_device /dev/dri/renderD128 -i input.mkv \
  -vf 'format=nv12,hwupload' -c:v h264_vaapi -qp 23 output.mp4

Hardware-accelerated H.265 (HEVC) encoding:

ffmpeg -vaapi_device /dev/dri/renderD128 -i input.mkv \
  -vf 'format=nv12,hwupload' -c:v hevc_vaapi -qp 25 output.mp4

Check if VAAPI is available on your system:

ls /dev/dri/renderD128
vainfo

If renderD128 exists and vainfo lists supported profiles, hardware transcoding is ready.

Other hardware backends

FFmpeg also supports NVENC/NVDEC (NVIDIA GPUs), AMF (AMD GPUs), and VideoToolbox (macOS). The -hwaccel flag selects the backend:

ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -i input.mkv -c:v h264_vaapi output.mp4

Hardware transcoding on a seedbox

Media servers like Jellyfin and Plex use FFmpeg internally for real-time transcoding when a client device cannot play the original format. On a seedbox with an Intel iGPU, FFmpeg's VAAPI support enables hardware transcoding directly.

On shared seedbox plans, the iGPU is shared between users. For dedicated hardware transcoding — multiple simultaneous streams, 4K HEVC, or a family media library — a Minidedi dedicated server gives you the full Intel Quick Sync iGPU with no resource sharing. See Seedbox for Plex and Jellyfin for a complete guide to media server setup.

Use Cases

Encoding media for streaming platforms
Compressing large video files
Converting between file types
Editing or trimming media content
Embedding subtitles or watermarks
Processing surveillance or dashcam footage
Automating media workflows in seedboxes and servers

Integration

FFmpeg is often integrated into other software and platforms, including:

OBS Studio (for live streaming)
VLC media player (internal decoding/encoding)
HandBrake (video conversion GUI)
Media servers like Jellyfin, Plex, and Emby
Server automation and seedboxes (e.g., for transcoding, preview generation)

Licensing

FFmpeg is primarily licensed under the LGPLv2.1 or GPLv2, depending on compilation options and external libraries included.