YouTube Live Capture

This module is used to capture images from YouTube live.

Näkymä Helsingistä location list

YouTube Capture Experiment

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    info = ydl.extract_info(nakyma_helsinkigista_youtube_live_url, download=False)
    for o in info['formats']:
        if o['resolution'] == '1280x720':
            print(o['url'])
            break
    else:
        raise ValueError("No 1280x720 format")

[youtube] Extracting URL: https://www.youtube.com/watch?v=LMZQ7eFhm58
[youtube] LMZQ7eFhm58: Downloading webpage
[youtube] LMZQ7eFhm58: Downloading ios player API JSON
[youtube] LMZQ7eFhm58: Downloading web creator player API JSON
[youtube] LMZQ7eFhm58: Downloading m3u8 information
https://manifest.googlevideo.com/api/manifest/hls_playlist/expire/1731361277/ei/nSUyZ7_VK6a80u8Pr9XG4Qc/ip/2001:14bb:693:814b:6cf8:466:4906:b913/id/LMZQ7eFhm58.4/itag/232/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/sgovp/gir%3Dyes%3Bitag%3D136/rqh/1/hdlc/1/hls_chunk_host/rr5---sn-qo5-ixas.googlevideo.com/xpc/EgVo2aDSNQ%3D%3D/playlist_duration/3600/manifest_duration/3600/vprv/1/playlist_type/DVR/initcwndbps/1467500/met/1731339678,/mh/l8/mm/44/mn/sn-qo5-ixas/ms/lva/mv/m/mvi/5/pcm2cms/yes/pl/49/rms/lva,lva/dover/13/pacing/0/short_key/1/keepalive/yes/fexp/51312688,51326932/mt/1731339162/sparams/expire,ei,ip,id,itag,source,requiressl,ratebypass,live,sgovp,rqh,hdlc,xpc,playlist_duration,manifest_duration,vprv,playlist_type/sig/AJfQdSswRQIgFW9WJZ0GfBMxlRihLf2v4o741rOonQ5NivOu4kHwVx8CIQDA3g0dAE0BWx_BDkfyldNsF2z4Jf74xYomUYrSKs4UBA%3D%3D/lsparams/hls_chunk_host,initcwndbps,met,mh,mm,mn,ms,mv,mvi,pcm2cms,pl,rms/lsig/AGluJ3MwRgIhAK3opSPBuO135lJUjthUvwfChQaEONmaVsFidce2uE9gAiEAspdlt85ojgsBDa697pSlYP7X308ml8MSpMmKky605LM%3D/playlist/index.m3u8

source

stream_url

 stream_url (ytlive_url:str, ydl_opts:dict)

source

show_frame

 show_frame (frame)

source

crop_frame

 crop_frame (frame, crop=(0, 0, 480, 30))

source

frame_to_text

 frame_to_text (frame)

source

known

 known (txt:str, known_places:str)

try to find one of known_places are included in the given txt

assert known("Torninnnnnn", nakyma_helsinki_known_places)=="Torni"

source

fname

 fname (prefix, dt, pl)

url = stream_url(nakyma_helsinkigista_youtube_live_url, ydl_opts)
cap = cv2.VideoCapture(url)
ret, frame = cap.read()
if ret:
    show_frame(crop_frame(frame))
    print(frame_to_text(crop_frame(frame)))
    try:
        print(fname("cap_", *meta(crop_frame(frame), printing=True)))
    except Exception as e:
        print(e)
else:
    print("Failed to capture frame.")

[youtube] Extracting URL: https://www.youtube.com/watch?v=LMZQ7eFhm58
[youtube] LMZQ7eFhm58: Downloading webpage
[youtube] LMZQ7eFhm58: Downloading ios player API JSON
[youtube] LMZQ7eFhm58: Downloading web creator player API JSON
[youtube] LMZQ7eFhm58: Downloading m3u8 information

11.11.2024 17:33:48 Presidentinlinna
11.11.2024 17:33:48 Presidentinlinna
cap_2024.11.11_17:33:48_Presidentinlinna.jpg

def capture_youtube_live_frame(youtube_live_url:str=nakyma_helsinkigista_youtube_live_url):
    "Capture a frame from the given YouTube Live URL and save into a JPEG file"

    url = stream_url(youtube_live_url, ydl_opts)
    cap = cv2.VideoCapture(url)
    ret, frame = cap.read()
    #show_frame(crop_frame(frame))
    if ret==False:
        raise Exception("Failed to capture frame.")
    try:        
        path = Path("../data")/fname("cap_", *meta(crop_frame(frame), printing=True))
    except:
        path = Path("../data")/fname("fail_", datetime.now(), "nowhere")
    path.parent.mkdir(parents=True, exist_ok=True)
    cv2.imwrite(path, frame)
    return path

file = capture_youtube_live_frame()
file

source

YTLive

 YTLive (url:str, data_dir:pathlib.Path=Path('../data'),
         place:str='nowhere')

Initialize self. See help(type(self)) for accurate signature.

	Type	Default	Details
url	str		YouTube Live URL
data_dir	Path	../data	directory to store captured images
place	str	nowhere	place name

SantaClausVilledge = YTLive(url="https://www.youtube.com/live/Cp4RRAEgpeU?si=IwqJ4QU1Umv9PdgW", place="santaclausvillege")
file = SantaClausVilledge()
file

[youtube] Extracting URL: https://www.youtube.com/live/Cp4RRAEgpeU?si=IwqJ4QU1Umv9PdgW
[youtube] Cp4RRAEgpeU: Downloading webpage
[youtube] Cp4RRAEgpeU: Downloading ios player API JSON
[youtube] Cp4RRAEgpeU: Downloading web creator player API JSON
[youtube] Cp4RRAEgpeU: Downloading m3u8 information

Path('../data/cap_2024.11.11_17:41:25_santaclausvillege.jpg')

source

NHsta

 NHsta (url:str='https://www.youtube.com/watch?v=LMZQ7eFhm58',
        data_dir:pathlib.Path=Path('../data'), place:str='unclear')

Initialize self. See help(type(self)) for accurate signature.

	Type	Default	Details
url	str	https://www.youtube.com/watch?v=LMZQ7eFhm58	YouTube Live URL
data_dir	Path	../data	directory to store captured images
place	str	unclear	place name if OCR doesn’t work

NakymaHelsingista = NHsta()
file = NakymaHelsingista()
file

[youtube] Extracting URL: https://www.youtube.com/watch?v=LMZQ7eFhm58
[youtube] LMZQ7eFhm58: Downloading webpage
[youtube] LMZQ7eFhm58: Downloading ios player API JSON
[youtube] LMZQ7eFhm58: Downloading web creator player API JSON
[youtube] LMZQ7eFhm58: Downloading m3u8 information
SR ILO ee
cap_2024.11.11_17:48:51_unclear.jpg

Path('../data/cap_2024.11.11_17:48:51_unclear.jpg')

def crop_image(path, crop=(0, 0, 480, 30)): return Image.open(path).crop(crop)
def show_image(path):
    plt.imshow(crop_image(path))
    plt.axis('off')
    plt.show()

show_image(file)

Extract meta data from an image file

try:
    fname("cap_", *meta(files[1]))
except:
    pass

Rename files with meta info

“cap_2024.10.04_14:56:49_Presidentinlinna”

“cap_2024.10.06_19:04:14_Kauppatori”

“cap_2024.10.06_20:08:29_Kauppatori”

for i, o in enumerate(glob.glob("../data/cap_*_unclear.jpg")):
    try:
        new = Path("../data")/fname("cap_", *meta(o, True))
        print(i, o, " -> ", new)
        os.rename(o, new)
    except Exception as e:
        print(o)

../data/cap_2024.11.11_16:18:12_unclear.jpg
../data/cap_2024.11.11_15:31:04_unclear.jpg
../data/cap_2024.11.11_15:33:25_unclear.jpg
../data/cap_2024.11.11_15:40:50_unclear.jpg
../data/cap_2024.11.11_15:39:09_unclear.jpg
../data/cap_2024.11.11_15:30:46_unclear.jpg