[FFmpeg-devel] [PATCH] avcodec/libvpxenc: Set min/max quantizer to 0 for lossless mode

[Michael Niedermayer]

Fixes Ticket4246

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavcodec/libvpxenc.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index 7f7d4ae..176c6b6 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -330,10 +330,15 @@ static av_cold int vpx_init(AVCodecContext *avctx,
         }
     }
 
-    if (avctx->qmin >= 0)
-        enccfg.rc_min_quantizer = avctx->qmin;
-    if (avctx->qmax >= 0)
-        enccfg.rc_max_quantizer = avctx->qmax;
+    if (avctx->codec_id == AV_CODEC_ID_VP9 && ctx->lossless == 1) {
+        enccfg.rc_min_quantizer =
+        enccfg.rc_max_quantizer = 0;
+    } else {
+        if (avctx->qmin >= 0)
+            enccfg.rc_min_quantizer = avctx->qmin;
+        if (avctx->qmax >= 0)
+            enccfg.rc_max_quantizer = avctx->qmax;
+    }
 
     if (enccfg.rc_end_usage == VPX_CQ
 #if CONFIG_LIBVPX_VP9_ENCODER
-- 
1.7.9.5