ffmpeg - 如何在ffmpeg中添加多个过滤器？

Question

我想应用音量增加、亮度增加并将 Logo 放在视频的右上角。
请纠正我:ffmpeg -y -i input_video_path -i logo_path -filter_complex "[0:1]volume=volume=6dB:precision=fixed;[0:0]eq=gamma=1.5:saturation=1.3;[1:0]overlay= main_w-(overlay_w + 10): 10" -pix_fmt yuvj420p output_video_path应用此错误后我收到此错误:Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay_2

Answer 1

您需要为每个过滤器提供标签:

ffmpeg -y -i input_video_path -i logo_path -filter_complex "[0:a]volume=volume=6dB:precision=fixed[a];[0:v]eq=gamma=1.5:saturation=1.3[bg];[bg][1:0]overlay=main_w-(overlay_w + 10):10,format=yuvj420p[v]" -map "[v]" -map "[a]" output_video_path

见 FFmpeg Filtering Introduction举个例子。