Guides to video and audio formats, codecs and quality

Clear explanations of containers, codecs, bitrates, channels, frame rates, and playback compatibility.

Editorial illustration for The practical guide to video codecs for the web

The practical guide to video codecs for the web

A dependable web video balances reach, quality, decoding cost, and file weight.

9 min read →
02

Bitrate, resolution, and frame rate: which lever matters?

These controls interact. Reduce the one your content can spare rather than applying the same preset to every clip.

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03

Lossless vs. lossy audio for music, speech, and archives

FLAC, WAV, AAC, and MP3 solve different storage and delivery problems.

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04

Sample rate and bit depth: useful numbers, sensible limits

Higher settings can help production headroom, but they do not automatically improve a finished listening copy.

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How to approach video & audio

Container, codec, profile, bitrate, frame rate, channels, and duration jointly determine whether media will play well.

A media file can have a familiar extension and still fail because its video codec, audio codec, profile, channel layout, or metadata is unsupported. Inspect the streams before conversion, choose a destination profile documented by the target device, and test playback, seeking, duration, synchronization, captions, and high-motion quality on a representative output before processing a full batch.

Put the advice to work with the online video converter, the audio format converter or extracting MP3 audio from video.

Separate containers from codecs

Inspect the source streams and duration. Match codecs to the target player or editor.

Balance reach, bitrate, and editing needs

Encode a representative high-motion or complex-audio sample. Check playback, sync, seeking, and channel layout.

Media playback and quality check

  • Video and audio codecs are supported by the destination.
  • Duration, frame rate, and audio sync remain correct.
  • High-motion detail and quiet audio passages remain acceptable.
  • Captions, chapters, and required metadata were retained or exported separately.