It downloads all the files but it fails at the end
Traceback (most recent call last):
File "/home/sisi/.local/bin/bbb-dl", line 8, in
sys.exit(main())
File "/home/sisi/.local/lib/python3.8/site-packages/bbb_dl/main.py", line 498, in main
BBBDL(args.verbose).run(args.URL, args.add_webcam, args.keep_tmp_files)
File "/home/sisi/.local/lib/python3.8/site-packages/bbb_dl/main.py", line 190, in run
slideshow_w, slideshow_h = self._rescale_slides(slides_infos)
File "/home/sisi/.local/lib/python3.8/site-packages/bbb_dl/main.py", line 387, in _rescale_slides
self.ffmpeg.rescale_image(slide.path, rescaled_path, new_width, new_height)
File "/home/sisi/.local/lib/python3.8/site-packages/bbb_dl/ffmpeg.py", line 71, in rescale_image
self.pp.run_ffmpeg(image, out_file, ["-vf", "pad=%s:%s:ow/2-iw/2:oh/2-ih/2" % (width, height)])
File "/home/sisi/.local/lib/python3.8/site-packages/bbb_dl/ffmpeg.py", line 62, in run_ffmpeg
self.run_ffmpeg_multiple_files([path], out_path, opts, opts_before)
File "/home/sisi/.local/lib/python3.8/site-packages/bbb_dl/ffmpeg.py", line 58, in run_ffmpeg_multiple_files
raise FFmpegPostProcessorError(msg)
youtube_dl.postprocessor.ffmpeg.FFmpegPostProcessorError: Conversion failed!