config_generator.py

import bmf

input_video_path_1 = "../../files/header.mp4"
input_video_path_2 = "../../files/header.mp4"
input_video_path_3 = '../../files/big_bunny_10s_30fps.mp4'
logo_video_path_1 = "../../files/xigua_prefix_logo_x.mov"
logo_video_path_2 = "../../files/xigua_loop_logo2_x.mov"
output_path = "./video.mp4"

# some parameters
output_width = 1280
output_height = 720
logo_width = 320
logo_height = 144

# create graph
graph = bmf.graph()

# tail video
tail = graph.decode({'input_path': input_video_path_1})

# header video
header = graph.decode({'input_path': input_video_path_2})

# main video
video = graph.decode({'input_path': input_video_path_3})

# logo video
logo_1 = (graph.decode({'input_path': logo_video_path_1
                        })['video'].scale(logo_width, logo_height))
logo_2 = (graph.decode({'input_path': logo_video_path_2})['video'].scale(
    logo_width,
    logo_height).ff_filter('loop', loop=-1,
                           size=991).ff_filter('setpts', 'PTS+3.900/TB'))

# main video processing
main_video = (video['video'].scale(output_width, output_height).overlay(
    logo_1, repeatlast=0).overlay(logo_2,
                                  x='if(gte(t,3.900),960,NAN)',
                                  y=0,
                                  shortest=1))

# concat video
concat_video = (bmf.concat(header['video'].scale(output_width, output_height),
                           main_video,
                           tail['video'].scale(output_width, output_height),
                           n=3))

# concat audio
concat_audio = (bmf.concat(header['audio'],
                           video['audio'],
                           tail['audio'],
                           n=3,
                           v=0,
                           a=1))

bmf.encode(
    concat_video, concat_audio, {
        "output_path": output_path,
        "video_params": {
            "codec": "h264",
            "width": 1280,
            "height": 720,
            "preset": "veryfast",
            "crf": "23",
            "x264-params": "ssim=1:psnr=1"
        },
        "audio_params": {
            "codec": "aac",
            "bit_rate": 128000,
            "sample_rate": 48000,
            "channels": 2
        },
        "mux_params": {
            "fflags": "+igndts",
            "movflags": "+faststart+use_metadata_tags",
            "max_interleave_delta": "0"
        }
    })

graph.generate_config_file(file_name='generated_graph.json')