TumblrでGIFアニアップしたときのエラー upload_photo

gistfile1.json

{
   "meta" :
      {
         "status" : 200,
         "msg" : "OK"
      },
   "response" :
      [
         {
            "original_filename" : "test_shoot2_400-df.gif",
            "error" : "Magick error: sh: line 1: 31536 Killed                  /usr/local/bin/convert - -coalesce -resize \"250x400>\" gif:-\n"
         }
      ]
}

gistfile2.txt

{
   "meta" :
      {
         "status" : 200,
         "msg" : "OK"
      },
   "response" :
      [
         {
            "original_filename" : "test_shoot2_720-dr.gif",
            "error" : "Magick error: sh: line 1:  5115 Killed                  /usr/local/bin/convert - -coalesce -resize \"500x750>\" gif:-\n"
         }
      ]
}

2 ->
720x406