AVIF quality comparison

example1/original.jpg • credits: Jeff Sheldon, via Unsplash

example2/original.jpg • credits: note thanun, via Unsplash

example3/original.jpg • credits: hao wang, via Unsplash

example4/original.png • credits: macrovector, via freepik

AVIF convert

Running the script encode.sh encodes original images to q-$q.avif files, where $q is a variable for setting cq-level parameter.

The command is the following:

avifenc -j all --min 0 --max 63 --minalpha 0 --maxalpha 63 -a end-usage=q -a cq-level=$q -a tune=ssim original.jpg q-$q.avif

Where the parameters are:

• -a cq-level=$q: Constant Quality level. Value can be from 0-63. Lower values mean better quality and greater file size.
• -j all: Number of jobs (worker threads, all uses all available cores).
• --min 0: Min quantizer for color (0-63).
• --max 63: Max quantizer for color (0-63).
• --minalpha 0: Min quantizer for alpha (0-63).
• --maxalpha 63: Max quantizer for alpha (0-63).
• -a end-usage=q Rate control mode set to Constant Quality mode.
• -a tune=ssim: SSIM as tune the encoder for distortion metric.

DSSIM

Compiled Kornel Lesiński's dssim library with AVIF support:

1. git clone https://github.com/kornelski/dssim.git /tmp/dssim
2. cargo build --release --features avif --manifest-path /tmp/dssim/Cargo.toml
3. /tmp/dssim/target/release/dssim example1/original.jpg example1/*.avif
4. /tmp/dssim/target/release/dssim example2/original.jpg example2/*.avif
5. /tmp/dssim/target/release/dssim example3/original.jpg example3/*.avif
6. /tmp/dssim/target/release/dssim example4/original.png example4/*.avif

The tool calculated each avif file dissimilarity from the original images.

Results

File	E1 size	E1 size%	E1 DSSIM	E2 size	E2 size%	E2 DSSIM	E3 size	E3 size%	E3 DSSIM	E4 size	E4 size%	E4 DSSIM
original.jpg	1,832,862	100.00%	0.00000000	3,440,017	100.00%	0.00000000	2,020,087	100.00%	0.00000000	2,501,936	100.00%	0.00000000
q-0.avif	5,608,016	305.97%	0.00017465	9,219,013	267.99%	0.00006591	5,256,395	260.21%	0.00019494	1,940,541	77.56%	0.00001695
q-1.avif	2,350,808	128.26%	0.00019948	4,859,779	141.27%	0.00009589	2,886,003	142.87%	0.00021186	1,041,235	41.62%	0.00002756
q-2.avif	2,137,542	116.62%	0.00021586	4,238,474	123.21%	0.00011543	2,482,796	122.91%	0.00022589	785,814	31.41%	0.00003294
q-3.avif	1,996,515	108.93%	0.00023554	3,938,260	114.48%	0.00014014	2,200,418	108.93%	0.00024497	624,078	24.94%	0.00003908
q-4.avif	1,840,268	100.40%	0.00026059	3,685,180	107.13%	0.00015821	1,994,946	98.76%	0.00026460	528,268	21.11%	0.00004491
q-5.avif	1,756,577	95.84%	0.00031036	3,562,627	103.56%	0.00020261	1,834,495	90.81%	0.00030249	450,637	18.01%	0.00005130
q-6.avif	1,658,133	90.47%	0.00035917	3,435,751	99.88%	0.00024606	1,685,859	83.45%	0.00034150	398,980	15.95%	0.00005724
q-7.avif	1,536,763	83.84%	0.00043921	3,262,133	94.83%	0.00028608	1,542,511	76.36%	0.00040194	352,008	14.07%	0.00006148
q-8.avif	1,440,293	78.58%	0.00049170	3,151,035	91.60%	0.00032102	1,439,774	71.27%	0.00043619	319,914	12.79%	0.00006676
q-9.avif	1,340,917	73.16%	0.00056366	3,053,867	88.77%	0.00037296	1,329,391	65.81%	0.00048589	288,707	11.54%	0.00007286
q-10.avif	1,256,395	68.55%	0.00064390	2,930,470	85.19%	0.00044769	1,241,566	61.46%	0.00053314	267,311	10.68%	0.00007783
q-11.avif	1,180,902	64.43%	0.00071756	2,830,000	82.27%	0.00050667	1,165,886	57.71%	0.00057728	248,783	9.94%	0.00008381
q-12.avif	1,097,950	59.90%	0.00080692	2,713,799	78.89%	0.00058358	1,087,733	53.85%	0.00062803	229,339	9.17%	0.00009037
q-13.avif	1,033,989	56.41%	0.00089085	2,628,864	76.42%	0.00067323	1,025,966	50.79%	0.00067557	214,944	8.59%	0.00009676
q-14.avif	971,522	53.01%	0.00097779	2,534,595	73.68%	0.00077245	967,005	47.87%	0.00072505	202,290	8.09%	0.00010132
q-15.avif	922,275	50.32%	0.00104488	2,454,398	71.35%	0.00085579	914,591	45.27%	0.00077114	191,653	7.66%	0.00010748
q-16.avif	871,687	47.56%	0.00113375	2,369,029	68.87%	0.00095177	859,189	42.53%	0.00082935	178,643	7.14%	0.00011546
q-17.avif	829,122	45.24%	0.00121831	2,274,503	66.12%	0.00107020	812,992	40.25%	0.00088383	170,158	6.80%	0.00012184
q-18.avif	789,807	43.09%	0.00130430	2,185,941	63.54%	0.00117705	772,375	38.23%	0.00093417	161,804	6.47%	0.00012772
q-19.avif	753,032	41.09%	0.00139719	2,115,022	61.48%	0.00128848	735,986	36.43%	0.00098242	154,716	6.18%	0.00013361
q-20.avif	711,184	38.80%	0.00149934	2,036,493	59.20%	0.00141220	696,047	34.46%	0.00105446	146,741	5.87%	0.00013954
q-21.avif	676,658	36.92%	0.00158142	1,960,429	56.99%	0.00153544	664,001	32.87%	0.00110076	140,872	5.63%	0.00014732
q-22.avif	645,535	35.22%	0.00166758	1,890,671	54.96%	0.00159035	635,246	31.45%	0.00114810	131,727	5.27%	0.00014521
q-23.avif	616,962	33.66%	0.00175660	1,823,060	53.00%	0.00169885	608,589	30.13%	0.00119827	126,395	5.05%	0.00015534
q-24.avif	581,818	31.74%	0.00187211	1,737,401	50.51%	0.00184523	578,421	28.63%	0.00125907	120,622	4.82%	0.00016189
q-25.avif	534,676	29.17%	0.00205190	1,618,010	47.03%	0.00205697	535,123	26.49%	0.00135154	113,188	4.52%	0.00017352
q-26.avif	487,690	26.61%	0.00226419	1,511,506	43.94%	0.00229647	497,876	24.65%	0.00145160	106,112	4.24%	0.00018602
q-27.avif	443,017	24.17%	0.00247434	1,401,255	40.73%	0.00253112	465,388	23.04%	0.00154683	99,702	3.98%	0.00019783
q-28.avif	402,114	21.94%	0.00270015	1,298,599	37.75%	0.00276959	437,223	21.64%	0.00163895	94,686	3.78%	0.00021174
q-29.avif	367,356	20.04%	0.00291583	1,198,954	34.85%	0.00302583	412,093	20.40%	0.00174122	90,326	3.61%	0.00022412
q-30.avif	337,005	18.39%	0.00313155	1,117,114	32.47%	0.00325541	389,844	19.30%	0.00183682	86,488	3.46%	0.00023649
q-31.avif	301,197	16.43%	0.00342845	1,017,633	29.58%	0.00362253	361,602	17.90%	0.00198315	81,210	3.25%	0.00025491
q-32.avif	270,442	14.76%	0.00371780	926,087	26.92%	0.00397932	335,529	16.61%	0.00212805	75,974	3.04%	0.00027206
q-33.avif	246,250	13.44%	0.00400157	852,123	24.77%	0.00433724	314,858	15.59%	0.00227105	72,657	2.90%	0.00029220
q-34.avif	225,048	12.28%	0.00426077	789,622	22.95%	0.00469546	297,009	14.70%	0.00242082	69,090	2.76%	0.00030875
q-35.avif	203,975	11.13%	0.00458198	723,488	21.03%	0.00514863	277,218	13.72%	0.00260518	65,230	2.61%	0.00033194
q-36.avif	184,942	10.09%	0.00491412	666,787	19.38%	0.00561515	257,978	12.77%	0.00281794	61,919	2.47%	0.00035858
q-37.avif	169,804	9.26%	0.00523421	620,487	18.04%	0.00607538	243,355	12.05%	0.00301268	58,839	2.35%	0.00038112
q-38.avif	154,956	8.45%	0.00563911	575,994	16.74%	0.00660038	227,742	11.27%	0.00327889	55,823	2.23%	0.00041282
q-39.avif	141,909	7.74%	0.00598582	535,822	15.58%	0.00717691	213,268	10.56%	0.00351862	53,038	2.12%	0.00044519
q-40.avif	131,204	7.16%	0.00633243	501,285	14.57%	0.00775435	200,492	9.92%	0.00376308	50,412	2.01%	0.00047721
q-41.avif	120,275	6.56%	0.00673911	466,437	13.56%	0.00844514	187,767	9.29%	0.00406272	47,909	1.91%	0.00051464
q-42.avif	111,408	6.08%	0.00711019	437,344	12.71%	0.00912211	177,298	8.78%	0.00434587	45,719	1.83%	0.00054468
q-43.avif	102,903	5.61%	0.00756085	407,543	11.85%	0.00992430	166,036	8.22%	0.00469760	43,588	1.74%	0.00059828
q-44.avif	95,669	5.22%	0.00798461	382,112	11.11%	0.01073139	156,492	7.75%	0.00506330	41,712	1.67%	0.00063323
q-45.avif	88,190	4.81%	0.00846126	356,893	10.37%	0.01168044	147,110	7.28%	0.00544948	39,843	1.59%	0.00069217
q-46.avif	81,671	4.46%	0.00895592	333,334	9.69%	0.01269146	138,500	6.86%	0.00591325	38,305	1.53%	0.00074152
q-47.avif	75,825	4.14%	0.00956686	312,619	9.09%	0.01372644	130,581	6.46%	0.00637055	36,605	1.46%	0.00079964
q-48.avif	70,397	3.84%	0.01012459	292,021	8.49%	0.01490846	122,274	6.05%	0.00689154	35,078	1.40%	0.00089081
q-49.avif	65,094	3.55%	0.01070428	272,833	7.93%	0.01622062	115,063	5.70%	0.00748383	33,608	1.34%	0.00096179
q-50.avif	60,194	3.28%	0.01132495	255,223	7.42%	0.01757990	108,643	5.38%	0.00807132	32,227	1.29%	0.00104929
q-51.avif	55,316	3.02%	0.01207977	238,444	6.93%	0.01909053	102,199	5.06%	0.00871745	30,952	1.24%	0.00115343
q-52.avif	51,205	2.79%	0.01276578	222,697	6.47%	0.02080486	96,030	4.75%	0.00946788	29,581	1.18%	0.00122032
q-53.avif	47,094	2.57%	0.01361508	207,007	6.02%	0.02268777	89,965	4.45%	0.01035214	28,508	1.14%	0.00132629
q-54.avif	43,258	2.36%	0.01451707	192,636	5.60%	0.02473018	84,358	4.18%	0.01126440	27,320	1.09%	0.00144504
q-55.avif	39,640	2.16%	0.01546033	177,709	5.17%	0.02713804	78,753	3.90%	0.01232024	26,332	1.05%	0.00156221
q-56.avif	36,188	1.97%	0.01653103	163,094	4.74%	0.03000666	73,714	3.65%	0.01357462	25,295	1.01%	0.00171353
q-57.avif	32,856	1.79%	0.01788240	148,790	4.33%	0.03326768	68,409	3.39%	0.01511803	24,138	0.96%	0.00190282
q-58.avif	29,384	1.60%	0.01945924	134,026	3.90%	0.03735460	62,902	3.11%	0.01715196	23,054	0.92%	0.00219556
q-59.avif	26,385	1.44%	0.02129385	119,241	3.47%	0.04237454	57,413	2.84%	0.01963627	21,939	0.88%	0.00250446
q-60.avif	23,407	1.28%	0.02317474	104,058	3.02%	0.04863330	52,354	2.59%	0.02287584	20,573	0.82%	0.00287790
q-61.avif	20,464	1.12%	0.02582241	90,311	2.63%	0.05624411	46,953	2.32%	0.02728882	19,480	0.78%	0.00353268
q-62.avif	16,915	0.92%	0.02993757	74,304	2.16%	0.06758287	39,874	1.97%	0.03595811	17,822	0.71%	0.00446529
q-63.avif	13,218	0.72%	0.03720529	55,747	1.62%	0.08783640	31,609	1.56%	0.05285349	16,060	0.64%	0.00656578

Resources

• https://github.com/AOMediaCodec/libavif/blob/main/doc/avifenc.1.md
• https://github.com/AOMediaCodec/libavif/blob/main/apps/avifenc.c
• https://github.com/mozilla/aom/blob/master/aomenc.c
• https://web.dev/compress-images-avif/#create-an-avif-image-with-default-settings
• https://www.ctrl.blog/entry/webp-avif-comparison.html
• https://www.reddit.com/r/AV1/comments/o7s8hk/high_quality_encoding_of_avif_images_using/