commit 3f01702208fd1442586668e845f5ab25cf7a05ef
author Wan-Teh Chang <wtc@google.com> Mon Feb 14 14:26:57 2022 -0800
committer Wan-Teh Chang <wtc@google.com> Mon Feb 14 14:58:57 2022 -0800
tree 46100b8aea5e24db150dd2b4f26b0d7aefffe4bd
parent d89118766bbb79aaacc23e22a874e300c63c028b

Document that SVT-AV1 doesn't support lossless yet

apps/avifenc.c

diff --git a/apps/avifenc.c b/apps/avifenc.c
index a8c2aaf..edadc98 100644
--- a/apps/avifenc.c
+++ b/apps/avifenc.c
@@ -750,6 +750,8 @@
             maxQuantizerAlpha = AVIF_QUANTIZER_LOSSLESS;      // lossless
             codecChoice = AVIF_CODEC_CHOICE_AOM;              // rav1e doesn't support lossless transform yet:
                                                               // https://github.com/xiph/rav1e/issues/151
+                                                              // SVT-AV1 doesn't support lossless encoding yet:
+                                                              // https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/1636
             requestedRange = AVIF_RANGE_FULL;                 // avoid limited range
             matrixCoefficients = AVIF_MATRIX_COEFFICIENTS_IDENTITY; // this is key for lossless
         } else if (!strcmp(arg, "-p") || !strcmp(arg, "--premultiply")) {