diff --git a/libmpcodecs/ve_lavc.c b/libmpcodecs/ve_lavc.c
index 34952cff47..2555ef6fc2 100644
--- a/libmpcodecs/ve_lavc.c
+++ b/libmpcodecs/ve_lavc.c
@@ -609,6 +609,10 @@ static int config(struct vf_instance_s* vf,
     switch(lavc_param_format)
     {
 	case IMGFMT_YV12:
+	    // HACK, mjpeg accepts PIX_FMT_YUV420P only with vstrict=-1
+	    if (strcasecmp(lavc_param_vcodec, "mjpeg") == 0)
+	      lavc_venc_context->pix_fmt = PIX_FMT_YUVJ420P;
+	    else
 	    lavc_venc_context->pix_fmt = PIX_FMT_YUV420P;
 	    break;
 	case IMGFMT_422P: