NameError: name 'videolist' is not defined

[wanfuse123]

ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video/driving.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf58.29.100
Duration: 00:19:47.84, start: 0.000000, bitrate: 1028 kb/s
Stream #0:0(und): Video: av1 (av01 / 0x31307661), none, 1920x1080, 891 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 24k tbc (default)
Metadata:
handler_name : ISO Media file produced by Google Inc.
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 133 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:1 -> #0:0 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, mp3, to 'sound.mp3':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
TSSE : Lavf57.83.100
Stream #0:0(und): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc57.107.100 libmp3lame
size= 27841kB time=00:19:47.84 bitrate= 192.0kbits/s speed=49.6x
video:0kB audio:27841kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002701%

NameError Traceback (most recent call last)
in ()
13 get_ipython().system('ffmpeg -y -i $vid -vn -ar 44100 -ac 2 -ab 192K -f mp3 sound.mp3')
14
---> 15 for videoname in videolist:
16 vidcap = cv2.VideoCapture('video/intermediate/' + videoname)
17 success,image = vidcap.read()

NameError: name 'videolist' is not defined

[wanfuse123]

#@title ← FPS Recovery

  | fps_of_video = int(cv2.VideoCapture(vid).get(cv2.CAP_PROP_FPS))
  | frames_of_video = int(cv2.VideoCapture(vid).get(cv2.CAP_PROP_FRAME_COUNT))
  |  
  | !rm -rf frames
  | !mkdir frames
  |  
  | play_video = True #@param {type:"boolean"}
  | play_html = ''
  |  
  | add_audio = True #@param {type:"boolean"}
  | if add_audio == True:
  | !ffmpeg -y -i $vid -vn -ar 44100 -ac 2 -ab 192K -f mp3 sound.mp3
  |  
  | for videoname in videolist:
  | vidcap = cv2.VideoCapture('video/intermediate/' + videoname)
  | success,image = vidcap.read()
  | count = 0
  | success = True
  | while success:
  | cv2.imwrite("frames/frame%09d.jpg" % count, image)
  | success,image = vidcap.read()
  | count += 1
  |  
  | frames = []
  | img = os.listdir("frames/")
  | img.sort()
  | for i in img:
  | frames.append(imageio.imread("frames/"+i))
  | frames = np.array(frames)
  | dstvid = 'video/final/' + videoname
  | imageio.mimsave(dstvid, frames, fps=fps_of_video)
  |  
  | !rm -rf frames
  | !mkdir frames
  |  
  | print('Assembly completed for ' + videoname)
  |  
  | if add_audio == True:
  | tmpfile = dstvid.replace('.mp4', '-audio.mp4')
  | !ffmpeg -i sound.mp3 -i $dstvid $tmpfile
  | !rm -rf $dstvid
  | !mv -f $tmpfile $dstvid
  |  
  | if play_video == True:
  | video = io.open(dstvid, 'r+b').read()
  | encoded = base64.b64encode(video)
  | play_html = play_html + (''.format(encoded.decode('ascii')))
  |  
  | clear_output()
  | HTML(data=play_html)