diff --git a/ffmpeg.c b/ffmpeg.c
index 6d22e43b16..3644e34a0b 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -1661,6 +1661,7 @@ static int av_encode(AVFormatContext **output_files,
                 codec->block_align= icodec->block_align;
                 break;
             case CODEC_TYPE_VIDEO:
+                codec->pix_fmt = icodec->pix_fmt;
                 codec->width = icodec->width;
                 codec->height = icodec->height;
                 codec->has_b_frames = icodec->has_b_frames;