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

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Mar 20 16:40:43 2015 +0100| [2a8198b32f27802c20cd11eedac9eb175d463496] | committer: Michael Niedermayer

avcodec/libvpxenc: Set min/max quantizer to 0 for lossless mode

Fixes Ticket4246

Reviewed-by: James Zern <jzern at google.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2a8198b32f27802c20cd11eedac9eb175d463496
---

 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