Media Format Reference

Auto-generated from CLI ffmpeg tables. Do not edit manually. Regenerate with: npx tsx scripts/generate-format-matrix.ts

Video Formats

Format	Extension	Default Codec	Audio Encoder
mp4	.mp4	h264	aac
webm	.webm	vp9	libopus
mov	.mov	h264	aac

Video Codecs

Codec	Encoder	Library	Containers
h264	libx264	libx264	mp4, mov
h265	libx265	libx265	mp4, mov
vp9	libvpx-vp9	libvpx	webm
av1	libsvtav1	libsvtav1	mp4, webm

Codec-Container Compatibility (Encoding)

Codec	mp4	webm	mov
h264	yes	—	yes
h265	yes	—	yes
vp9	—	yes	—
av1	yes	yes	—

Video Quality (CRF, lower = better)

Quality	H264	H265	VP9	AV1
very_low	32	35	42	45
low	28	30	36	38
medium	23	26	31	30
high	18	22	26	23
very_high	15	18	20	18

Video Audio Bitrate

Quality	aac (mp4/mov)	libopus (webm)
very_low	64k	48k
low	96k	64k
medium	128k	96k
high	192k	128k
very_high	256k	160k

Audio Formats

Format	Extension	Encoder	Library	Lossy
mp3	.mp3	libmp3lame	libmp3lame	yes
aac	.m4a	aac	built-in	yes
ogg	.ogg	libvorbis	libvorbis	yes
opus	.opus	libopus	libopus	yes
wav	.wav	pcm_s16le	built-in	no
flac	.flac	flac	built-in	no

Audio Bitrate (Lossy)

Quality	MP3	AAC	OPUS	VORBIS
very_low	96k	64k	48k	64k
low	128k	96k	64k	96k
medium	192k	128k	96k	128k
high	256k	192k	128k	192k
very_high	320k	256k	160k	256k

Image Formats

Format	Extension	Encoder	Library
jpeg	.jpg	mjpeg	built-in
png	.png	png	built-in
webp	.webp	libwebp	libwebp
gif	.gif	gif	built-in
avif	.avif	libaom-av1	libaom

Image Quality

Quality	JPEG	PNG	WEBP	AVIF
very_low	-q:v 24	level 9	-quality 30	-crf 48
low	-q:v 18	level 7	-quality 50	-crf 40
medium	-q:v 12	level 5	-quality 70	-crf 32
high	-q:v 6	level 3	-quality 80	-crf 24
very_high	-q:v 2	level 1	-quality 90	-crf 16

Stream Copy (Mux) Compatibility

Codecs that can be stream-copied into each container without re-encoding.

Video Codecs (Stream Copy)

Container	Supported Codecs
mp4	h264, hevc, av1, mpeg4
mov	h264, hevc, av1, mpeg4, prores
webm	vp8, vp9, av1

Audio Codecs (Stream Copy)

Container	Supported Codecs
mp4	aac, mp3, ac3, eac3, flac, opus
mov	aac, mp3, ac3, eac3, flac, pcm_s16le, pcm_s24le
webm	opus, vorbis