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From 61923302d12f80e2a5c945a3903d1009cf67778f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert-Andr=C3=A9=20Mauchin?= <eclipseo@mauchin.fr>
Date: Sat, 24 Jan 2026 17:30:35 +0100
Subject: [PATCH 1/2] Set SVT-AV1's avif option for v4.0.0 or later
---
libheif/plugins/encoder_svt.cc | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libheif/plugins/encoder_svt.cc b/libheif/plugins/encoder_svt.cc
index 03d87ca1ae..7993e3959a 100644
--- a/libheif/plugins/encoder_svt.cc
+++ b/libheif/plugins/encoder_svt.cc
@@ -858,9 +858,10 @@ static heif_error svt_start_sequence_encoding_intern(void* encoder_raw, const he
#endif
}
else {
- // TODO: enable when https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/2245 is resolved
- // svt_config.avif = true;
- // encoder->still_image_mode = true;
+#if SVT_AV1_CHECK_VERSION(4, 0, 0)
+ svt_config.avif = true;
+ encoder->still_image_mode = true;
+#endif
}
if (color_format == EB_YUV422 || bitdepth_y > 10) {
From f9919e34868920000ddba13c55e1bf3731b1e64b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert-Andr=C3=A9=20Mauchin?= <eclipseo@mauchin.fr>
Date: Sat, 24 Jan 2026 18:18:46 +0100
Subject: [PATCH 2/2] Use PredStructure values from definitions.h instead of
removed SvtAv1PredStructure for v4.0.0 or later
---
libheif/plugins/encoder_svt.cc | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/libheif/plugins/encoder_svt.cc b/libheif/plugins/encoder_svt.cc
index 7993e3959a..393748e997 100644
--- a/libheif/plugins/encoder_svt.cc
+++ b/libheif/plugins/encoder_svt.cc
@@ -838,8 +838,20 @@ static heif_error svt_start_sequence_encoding_intern(void* encoder_raw, const he
// svt_config.force_key_frames = true; TODO: this does not seem to work (see all [1])
#if 1
+#if SVT_AV1_CHECK_VERSION(4, 0, 0)
+ switch (options->gop_structure) {
+ case heif_sequence_gop_structure_intra_only:
+ //svt_config.pred_structure = 1; // LOW_DELAY
+ break;
+ case heif_sequence_gop_structure_lowdelay:
+ //svt_config.pred_structure = 1; // LOW_DELAY
+ break;
+ case heif_sequence_gop_structure_unrestricted:
+ svt_config.pred_structure = 2; // RANDOM_ACCESS
+ break;
+ }
+#else
// TODO: setting pref_structure to SVT_AV1_PRED_LOW_DELAY_B hangs the encoder
-
switch (options->gop_structure) {
case heif_sequence_gop_structure_intra_only:
//svt_config.pred_structure = SvtAv1PredStructure::SVT_AV1_PRED_LOW_DELAY_B;
@@ -851,6 +863,7 @@ static heif_error svt_start_sequence_encoding_intern(void* encoder_raw, const he
svt_config.pred_structure = SvtAv1PredStructure::SVT_AV1_PRED_RANDOM_ACCESS;
break;
}
+#endif
if (options->keyframe_distance_max) {
svt_config.intra_period_length = options->keyframe_distance_max; // TODO -1 ?
@@ -921,7 +934,7 @@ static heif_error read_encoder_output_packets(void* encoder_raw, bool done_sendi
/* TODO: this is a hack
* When using
- * svt_config.pred_structure = SvtAv1PredStructure::SVT_AV1_PRED_LOW_DELAY_B;
+ * svt_config.pred_structure = 1; // LOW_DELAY
* svt_av1_enc_get_packet() hangs on the second call. As a workaround, we can leave the
* loop when we got the image:
*/
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