[FFmpeg-cvslog] lavc/libvpxenc: Avoid vp8 transparency encoding with auto-alt-ref.

[Carl Eugen Hoyos]

ffmpeg | branch: master | Carl Eugen Hoyos <cehoyos at ag.or.at> | Fri Sep 16 14:21:09 2016 +0200| [44bcb636c1a7052059330c3edbd900246e15ae60] | committer: Carl Eugen Hoyos

lavc/libvpxenc: Avoid vp8 transparency encoding with auto-alt-ref.

Fixes ticket #5815.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=44bcb636c1a7052059330c3edbd900246e15ae60
---

 libavcodec/libvpxenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index f3cff81..2db87f7 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -631,6 +631,11 @@ FF_ENABLE_DEPRECATION_WARNINGS
     if (ctx->tune >= 0)
         codecctl_int(avctx, VP8E_SET_TUNING,           ctx->tune);
 
+    if (ctx->auto_alt_ref && ctx->is_alpha && avctx->codec_id == AV_CODEC_ID_VP8) {
+        av_log(avctx, AV_LOG_ERROR, "Transparency encoding with auto_alt_ref does not work\n");
+        return AVERROR(EINVAL);
+    }
+
     if (CONFIG_LIBVPX_VP8_ENCODER && avctx->codec_id == AV_CODEC_ID_VP8) {
 #if FF_API_PRIVATE_OPT
 FF_DISABLE_DEPRECATION_WARNINGS