Hi!
Lossless libvpx encoding is possible with "-crf 0".
Please comment, Carl Eugen
From 76e8df1da3470a1232f6128b37a681926d4cab92 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffm...@gmail.com>
Date: Thu, 7 Feb 2019 20:39:12 +0100
Subject: [PATCH] lavc/libvpxenc: Deprecate lossless, there is -crf 0.
---
doc/encoders.texi | 2 +-
libavcodec/libvpxenc.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/doc/encoders.texi b/doc/encoders.texi
index e86ae69..9efa015 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -1802,7 +1802,7 @@ Template defining the membership of frames to temporal layers.
@item VP9-specific options
@table @option
@item lossless
-Enable lossless mode.
+Deprecated, set the @option{crf} option to 0.
@item tile-columns
Set number of tile columns to use. Note this is given as
@code{log2(tile_columns)}. For example, 8 tile columns would be requested by
diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index c823b8a..2ed8a70 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -1219,7 +1219,7 @@ static const AVOption vp9_options[] = {
{ "auto-alt-ref", "Enable use of alternate reference "
"frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
{ "cpu-used", "Quality/Speed ratio modifier", OFFSET(cpu_used), AV_OPT_TYPE_INT, {.i64 = 1}, -8, 8, VE},
- { "lossless", "Lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE},
+ { "lossless", "Deprecated, use -crf 0", OFFSET(lossless), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE},
{ "tile-columns", "Number of tile columns to use, log2", OFFSET(tile_columns), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
{ "tile-rows", "Number of tile rows to use, log2", OFFSET(tile_rows), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, VE},
{ "frame-parallel", "Enable frame parallel decodability features", OFFSET(frame_parallel), AV_OPT_TYPE_BOOL,{.i64 = -1}, -1, 1, VE},
--
1.7.10.4
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