Cannot find a matching stream for unlabeled input pad 2 on filter Parsed_gltransition_0

[CJL6015]

env DISPLAY=:1 ffmpeg -i /ligaoliang/chart.mp4 -i /ligaoliang/back1.mp4 -filter_complex gltransition -y out.mp4
ffmpeg version 5.0 Copyright (c) 2000-2022 the FFmpeg developers. This is my cmd

[CJL6015]

[root@VM-12-6-centos ~]# env DISPLAY=:1 ffmpeg -i /ligaoliang/chart.mp4 -i /ligaoliang/back1.mp4 -filter_complex gltransition -y out.mp4
ffmpeg version 5.0 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 8 (GCC)
configuration: --enable-libx264 --enable-gpl --enable-opengl --enable-filter=gltransition --extra-libs='-lGLEW -lglfw -ldl'
libavutil 57. 17.100 / 57. 17.100
libavcodec 59. 18.100 / 59. 18.100
libavformat 59. 16.100 / 59. 16.100
libavdevice 59. 4.100 / 59. 4.100
libavfilter 8. 24.100 / 8. 24.100
libswscale 6. 4.100 / 6. 4.100
libswresample 4. 3.100 / 4. 3.100
libpostproc 56. 3.100 / 56. 3.100
Input #0, matroska,webm, from '/ligaoliang/chart.mp4':
Metadata:
encoder : Chrome
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Video: vp8, yuv420p(progressive), 1080x1920, SAR 1:1 DAR 9:16, 1k tbr, 1k tbn (default)
Metadata:
alpha_mode : 1
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/ligaoliang/back1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf59.16.100
Duration: 00:00:35.80, start: 0.000000, bitrate: 5474 kb/s
Stream #1:00x1: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1080x1920, 5471 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
Metadata:
handler_name : L-SMASH Video Handler
vendor_id : [0][0][0][0]
Cannot find a matching stream for unlabeled input pad 2 on filter Parsed_gltransition_0

[HowToLoveChina]

`
static const AVFilterPad gltransition_inputs[] = {
{
.name = "from",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = setup_gl,
},
{
.name = "to",
.type = AVMEDIA_TYPE_VIDEO,
}/*, //pacth here add comment
{NULL}
*/
};

static const AVFilterPad gltransition_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
}
/*, //pacth here add comment
{NULL}
*/
};
`

description of AVFilterPad can't add {NULL}

[HowToLoveChina]

compile with ffmpeg 4.2.2 all is ok