[Warn] (0.000, +0) lv_init: Memory integrity checks are enabled via LV_USE_ASSERT_MEM_INTEGRITY which makes LVGL much slower lv_init.c:232
[Warn] (0.000, +0) lv_init: Object sanity checks are enabled via LV_USE_ASSERT_OBJ which makes LVGL much slower lv_init.c:236
[Warn] (0.000, +0) lv_init: Style sanity checks are enabled that uses more RAM lv_init.c:240
[Error] (584849.700, +584849700) ffmpeg_open_codec_context: Failed to open video codec lv_ffmpeg.c:548
[Error] (584849.700, +0) ffmpeg_open_file: Could not find video stream in the input, aborting lv_ffmpeg.c:699
[Error] (584849.701, +1) lv_ffmpeg_player_set_src: ffmpeg file open failed: /lvgl/examples/libs/ffmpeg/birds.mp4 lv_ffmpeg.c:158
[Error] (584849.701, +0) lv_ffmpeg_player_set_cmd: ffmpeg_ctx is NULL lv_ffmpeg.c:207
^C[Warn] (585090.369, +240668) handle_signal: ubus exit
请问有人知道原因吗