Disable key frame filtering when encoding images

wantehchang · wantehchang · commit 04e534159c2c · 2021-03-01T17:33:57.000-08:00
Disable key frame filtering when encoding still images.
diff --git a/src/codec_aom.c b/src/codec_aom.c
@@ -591,6 +591,11 @@ static avifResult aomCodecEncodeImage(avifCodec * codec,
         if (aomCpuUsed != -1) {
             aom_codec_control(&codec->internal->encoder, AOME_SET_CPUUSED, aomCpuUsed);
         }
+        if (addImageFlags & AVIF_ADD_IMAGE_FLAG_SINGLE) {
+            // Disable temporal filtering on key frames, otherwise we will lose a good amount of compression
+            // performance.
+            aom_codec_control(&codec->internal->encoder, AV1E_SET_ENABLE_KEYFRAME_FILTERING, 0);
+        }
         if (!avifProcessAOMOptionsPostInit(codec)) {
             return AVIF_RESULT_INVALID_CODEC_SPECIFIC_OPTION;
         }

Original file line number	Diff line number	Diff line change
`@@ -591,6 +591,11 @@ static avifResult aomCodecEncodeImage(avifCodec * codec,`
`591`	`591`	`if (aomCpuUsed != -1) {`
`592`	`592`	`aom_codec_control(&codec->internal->encoder, AOME_SET_CPUUSED, aomCpuUsed);`
`593`	`593`	`}`
	`594`	`+ if (addImageFlags & AVIF_ADD_IMAGE_FLAG_SINGLE) {`
	`595`	`+ // Disable temporal filtering on key frames, otherwise we will lose a good amount of compression`
	`596`	`+ // performance.`
	`597`	`+ aom_codec_control(&codec->internal->encoder, AV1E_SET_ENABLE_KEYFRAME_FILTERING, 0);`
	`598`	`+ }`
`594`	`599`	`if (!avifProcessAOMOptionsPostInit(codec)) {`
`595`	`600`	`return AVIF_RESULT_INVALID_CODEC_SPECIFIC_OPTION;`
`596`	`601`	`}`