diff options
| -rw-r--r-- | libavcodec/png.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/png.c b/libavcodec/png.c index 0dd9eaec23..6d588c35a8 100644 --- a/libavcodec/png.c +++ b/libavcodec/png.c @@ -850,7 +850,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, for(i = 0; i < 256; i++) { v = palette[i]; alpha = v >> 24; - if (alpha != 0xff) + if (alpha && alpha != 0xff) has_alpha = 1; *alpha_ptr++ = alpha; ptr[0] = v >> 16; |