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• Is "begin" param dead in Youtube's *.c.youtube.com/videoplayback ?

  23 janvier 2013, par Minime

  I tested Youtube video download with begin param using ytdl, and realized that it's not working properly. Below is an URL with begin param. (It won't work on your side because it's session-IP address based.)

  http://r4---sn-o097znee.c.youtube.com/videoplayback?ratebypass=yes&cp=U0hUTVNOT19JTENONF9LSFNIOmtjaWozaFd5Vnhl&newshard=yes&source=youtube&ipbits=8&fexp=916600%2C906072%2C923114%2C914093%2C916626%2C920704%2C912806%2C922403%2C922405%2C929901%2C913605%2C925710%2C929104%2C929110%2C908493%2C920201%2C913302%2C919009%2C911116%2C926403%2C910221%2C901451&id=58dafac107cd7cae&key=yt1&mt=1358307193&gcr=us&ms=au&itag=46&upn=efQT2cDue5M&ip=xxxx&sparams=cp%2Cgcr%2Cid%2Cip%2Cipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire&expire=1358331742&sver=3&mv=m&signature=C957313FEC2AC174F72CEFE52BF663ABAC8D0E4B.27F8485A36BE654CA25D3CA75A927D443523CA68&begin=12000

  I traced Youtube site by myself to see if there are any recent changes on their black boxed
  API. And I found that begin param is no longer put in videoplayback, but put in user_watch as below.

  http://www.youtube.com/user_watch?video_id=-YFiHW59ASs&ptk=StyleHaul&referrer=None&t=vjVQa1PpcFPiDK6v9s-rWrDn8gNv0QvpjyCIjiAgsm0=&asv=3&fmt=34&cpn=BOOMP-Bzbv1jikj9&el=detailpage&plid=AATTaqGSIR9CQ-MJ&begin=70000

  Its response is

  <?xml version="1.0" encoding="utf-8"?>

  And videoplayback only has range param, which indicate byte range where to pull. However, I couldn't figure out exact mechanism how new begin param works.

  http://r8---sn-p5q7yne6.c.youtube.com/videoplayback?algorithm=throttle-factor&burst=40&cp=U0hUTVNSVl9IT0NONF9LTFpGOlY5MU5RYVYtWHFw&cpn=BOOMP-Bzbv1jikj9&expire=1358378535&factor=1.25&fexp=919361%2C910207%2C916612%2C913112%2C912806%2C922403%2C922405%2C929901%2C913605%2C925710%2C929104%2C929110%2C908493%2C920201%2C913302%2C919009%2C911116%2C910221%2C901451&gcr=us&id=f981621d6e7d012b&ip=xxxx&ipbits=8&itag=34&keepalive=yes&key=yt1&ms=au&mt=1358354777&mv=m&newshard=yes&ratebypass=yes&signature=AA38C7074D8FA9DA44D01D9BB3675C78D05B9794.66D67C5AB111D8FB9EC3C8A141BBB11D9D70545D&source=youtube&sparams=algorithm%2Cburst%2Ccp%2Cfactor%2Cgcr%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&sver=3&upn=aLby9GtO0sU&range=3563520-5345279

  Can anyone explain how to pull a video starting from specific position(msec) in new API ?

• Uploading generated video as stream to youtube via RTSP instead of saving as a MP4 file

  26 mars 2020, par Shaan Khan

  What steps are needed to upload a generated video in FFMPEG to an RTSP stream instead of just saving it as an mp4 file ?

  So far I’ve managed to do one or the other but not both.
  I’ve managed to so far combine a video which will loop continuously until the audio ends with the addition of using a complex filter to then after creating this loop resizing it to 1280*720 and adding a designated picture as an overlay, however, I’m unable to instead of saving the file as an mp4 instead output it as an RTSP stream.

  This is the original audio, video and image combining command which gives an mp4 as an output :

  ffmpeg -stream_loop -1 -i {video} -i {audio} -i {image} -filter_complex \"[0:v]scale=1280:720[v0:v]; [v0:v][2:v] overlay[videoOutput:v]\" -map [\"videoOutput\":v] -map 1:a:0 -shortest -ac 2 -threads 0 -r 24 -y {output}

  This is the current parameters I’m using to upload the stream after generating it in the command before

  ffmpeg -re -i {input} -c:v libx264 -b:v 2M -c:a copy -strict -2 -flags +global_header -bsf:a aac_adtstoasc -bufsize 2100k -f flv {RTSPURL}/{YtPrivateKey}

  Would there be any nice way of combining these two to upload in ’real time’ ?

  Any help would be appreciated ! Thank you for any help in advance !

• youtube-dl, is there a way to extract the "specific format" video URL ? [closed]

  29 juillet 2020, par karma

  Following my question before in this link,
  
It seems that the copied version is from the highest resolution format, as the resulting video portion is 1920x1080 resolution.

  


  The available format :

  


  C:\Standalone Program\YoutubeDL>youtube-dl -F https://www.youtube.com/watch?v=kGDgGsrA78s
[youtube] kGDgGsrA78s: Downloading webpage
[info] Available formats for kGDgGsrA78s:
format code  extension  resolution note
249          webm       audio only tiny   52k , opus @ 50k (48000Hz), 7.49MiB
250          webm       audio only tiny   65k , opus @ 70k (48000Hz), 9.45MiB
251          webm       audio only tiny  114k , opus @160k (48000Hz), 17.07MiB
140          m4a        audio only tiny  164k , m4a_dash container, mp4a.40.2@128k (44100Hz), 21.06MiB
278          webm       256x144    144p  103k , webm container, vp9, 30fps, video only, 15.78MiB
160          mp4        256x144    144p  117k , avc1.4d400c, 30fps, video only, 12.96MiB
242          webm       426x240    240p  231k , vp9, 30fps, video only, 33.40MiB
133          mp4        426x240    240p  254k , avc1.4d4015, 30fps, video only, 25.10MiB
243          webm       640x360    360p  420k , vp9, 30fps, video only, 60.81MiB
134          mp4        640x360    360p  652k , avc1.4d401e, 30fps, video only, 61.92MiB
244          webm       854x480    480p  781k , vp9, 30fps, video only, 105.14MiB
135          mp4        854x480    480p 1190k , avc1.4d401f, 30fps, video only, 114.76MiB
247          webm       1280x720   720p 1550k , vp9, 30fps, video only, 211.07MiB
136          mp4        1280x720   720p 2383k , avc1.4d401f, 30fps, video only, 213.18MiB
248          webm       1920x1080  1080p 2752k , vp9, 30fps, video only, 408.32MiB
137          mp4        1920x1080  1080p 4443k , avc1.640028, 30fps, video only, 435.80MiB
18           mp4        640x360    360p  640k , avc1.42001E, 30fps, mp4a.40.2@ 96k (44100Hz), 106.07MiB (best)


  


  So after I do :

  


  youtube-dl -g https://www.youtube.com/watch?v=kGDgGsrA78s


  


  and the video URL result :

  


  https://r2---sn-uigxxi0ujipnvo-q2ne.googlevideo.com/videoplayback?expire=1596034295&ei=lzghX6SHKMOD8QPlx5SQBw&ip=223.255.228.87&id=o-AK6cYo88zJXe5Xb4y1QsXspuRnVCy-zPFpMaHcAaTQ-_&itag=137&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278&source=youtube&requiressl=yes&mh=DA&mm=31%2C29&mn=sn-uigxxi0ujipnvo-q2ne%2Csn-npoe7nlz&ms=au%2Crdu&mv=m&mvi=2&pl=24&initcwndbps=173750&vprv=1&mime=video%2Fmp4&gir=yes&clen=456970484&dur=1389.955&lmt=1521825834085900&mt=1596012582&fvip=5&keepalive=yes&fexp=23883098&c=WEB&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRgIhAMvZrHYvC1YrkvtARzhjyD8dnMnlefobGrOFM1rX6QZPAiEAqqeIsKdZ19y-SlHf-l8YwTx2yYbo1p5sFlVoC87oXEQ%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRAIgAIwAVMPrcMhAL476uN_ZzWj8vKPGGW58KCpHBYBsKeICICRgVWgthNvgbGl8VgQwscjJ0n8ib4XBNjRxRgSg2T5r&ratebypass=yes


  


  I think the URL is for :

  


  137          mp4        1920x1080  1080p 4443k , avc1.640028, 30fps, video only, 435.80MiB


  


  Since I want a smaller file size, I wonder if it's possible to get the video URL (for example) for :

  


  243          webm       640x360    360p  420k , vp9, 30fps, video only, 60.81MiB


  


  So then later when I feed the URL to ffmpeg to extract some portion of that lower quality video URL, the result has a smaller file size.

  


  Any kind of help would be greatly appreciated.
Thank you in advanced.

  


  BTW, I use Windows 10 command prompt (administrator).