diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 8ec8f56755..b2cce663b9 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -3142,6 +3142,7 @@ AVCodec mpeg1video_encoder = {
     MPV_encode_picture,
     MPV_encode_end,
     .supported_framerates= frame_rate_tab+1,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
     .capabilities= CODEC_CAP_DELAY,
 };
 
@@ -3154,6 +3155,7 @@ AVCodec mpeg2video_encoder = {
     MPV_encode_picture,
     MPV_encode_end,
     .supported_framerates= frame_rate_tab+1,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
     .capabilities= CODEC_CAP_DELAY,
 };
 #endif