[FFmpeg-devel] [PATCH] Fixing a stride issue in VP8 Alpha encode

[Vignesh Venkatasubramanian]

When encoding alpha channel in libvpx, the stride isn't set
properly for the alpha encoder. Fixing it.

Signed-off-by: Vignesh Venkatasubramanian <vigneshv at google.com>
---
 libavcodec/libvpxenc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index f5506f7..5f3c32a 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -667,6 +667,9 @@ static int vp8_encode(AVCodecContext *avctx, AVPacket *pkt,
             v_plane = av_malloc(frame->linesize[2] * frame->height);
             memset(v_plane, 0x80, frame->linesize[2] * frame->height);
             rawimg_alpha->planes[VPX_PLANE_V] = v_plane;
+            rawimg_alpha->stride[VPX_PLANE_Y] = frame->linesize[0];
+            rawimg_alpha->stride[VPX_PLANE_U] = frame->linesize[1];
+            rawimg_alpha->stride[VPX_PLANE_V] = frame->linesize[2];
         }
         timestamp                   = frame->pts;
         if (frame->pict_type == AV_PICTURE_TYPE_I)
-- 
1.8.3