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• Adding trimming option to Youtube-dl audio script

  22 septembre 2020, par Jim Jamil

  This is the current script, it's a Windows batch file that prompts for a Youtube url and then downloads the best audio in m4a. It's basically cobbled together and uses aria2 to manage the download.

  


  @echo off
SETLOCAL ENABLEDELAYEDEXPANSION
(set /p var1="Url? " && youtube-dl -f bestaudio[ext=m4a] --external-downloader aria2c --external-downloader-args "-j 16 -s 16 -x 16 -k 5M" --restrict-filenames -o "%%(title)s.%%(ext)s" --add-metadata --embed-thumbnail !Var1!)
ENDLOCAL
pause


  


  After asking for the url, I want to also prompt the user to input the start and end times to trim the audio, which would be done by ffmpeg post download.

  


  Something like :

  


  ffmpeg -i file.m4a -ss 00:00:20 -to 00:00:40 -c copy file-2.m4a


  


  Based on this : https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times/302469#302469

  


  The beginning and end times would need to be variables set by user input in 00:00:00 format, but not sure how to add the ffmpeg post-processing at the end or how it would all fit together. I want to add this trimming feature to remove some of the preamble on podcasts and get straight to the guest part of the show.

  


  The --embed-thumbnail is optional, and won't work anyway unless Atomic Parsley is present. FFmpeg often has trouble with Album Art anyway so I usually just use -vn on the final output file.

  


• youtube-dl (ffmpeg) blank error on embedding subtitles

  22 mars 2021, par Human1

  I am new to using youtube-dl, and therefore is quite unfamiliar with how it works. I configured it to download auto subs and english subs (if there were any), and embed them in the video. It worked for me for quite a good while (1 or 2 months), and it suddenly stopped working with blank errors starting to pop up, and I have no idea why that happened. I have checked that I am using the most updated version of youtube-dl and ffmpeg. I am currently using a m1 mac , and I don't know if that caused the problem. Below is the output I got with the -v command, as well as some background information.

  


  [debug] System config: []
[debug] User config: ['-o', '~/Documents/playlists/%(playlist)s/%(playlist_index)-i%(title)s.%(ext)s', '-f', 'mp4', '--write-sub', '--sub-lang', 'en', '--write-auto-sub', '--embed-subs']
[debug] Custom config: []
[debug] Command-line args: ['https://youtube.com/playlist?list=PL4cUxeGkcC9i3FXJSUfmsNOx8E7u6UuhG', '-v']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2021.03.14
[debug] Git HEAD: 59ada80ca
[debug] Python version 3.9.2 (CPython) - macOS-11.2.3-arm64-arm-64bit
[debug] exe versions: ffmpeg present, ffprobe present, rtmpdump 2.4
[debug] Proxy map: {}
[youtube:tab] PL4cUxeGkcC9i3FXJSUfmsNOx8E7u6UuhG: Downloading webpage
[download] Downloading playlist: CSS Flexbox Tutorial
[youtube:tab] playlist CSS Flexbox Tutorial: Downloading 12 videos
[download] Downloading video 1 of 12
[youtube] Y8zMYaD1bz0: Downloading webpage
[info] Writing video subtitles to: /Users/{username}/Documents/playlists/CSS Flexbox Tutorial/1CSS Flexbox Tutorial #1 - Introduction.en.vtt
[debug] Invoking downloader on 'https://r2---sn-45gpjx-3x4e.googlevideo.com/videoplayback?expire=1616392628&ei=VN1XYKikA9eo1gai6KegBg&ip=45.133.192.196&id=o-APtlxrUI2wU4tPFiSxBi5MzLnuR5EFYL3-TE-BpiPEYG&itag=22&source=youtube&requiressl=yes&mh=U3&mm=31%2C29&mn=sn-45gpjx-3x4e%2Csn-5hne6nlr&ms=au%2Crdu&mv=m&mvi=2&pl=24&initcwndbps=1155000&vprv=1&mime=video%2Fmp4&ns=r0wuXA2lBVMGhop9uJeEHHUF&ratebypass=yes&dur=317.161&lmt=1607169749865434&mt=1616370759&fvip=3&fexp=24001373%2C24007246&c=WEB&txp=5432434&n=_jK4PI5-7sa9Q0X2ye&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cratebypass%2Cdur%2Clmt&sig=AOq0QJ8wRAIgR0wbVc18mWDheT_QVT5Jsbmd647wKJNyVfzGRJd_oOkCIArV-vvKQmD3D7W90dw1l9b3zaJQNzltitp3BJPt2fqA&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAI9I7LQw5zTAldgCydhe3yzicBgvxYfxeHxI8lCxh3sLAiEAlT8Dpf93fiPbdMI3rHOebH-nFkToCZr1VfWaoX0HVeg%3D'
[download] /Users/{username}/Documents/playlists/CSS Flexbox Tutorial/1CSS Flexbox Tutorial #1 - Introduction.mp4 has already been downloaded
[download] 100% of 16.50MiB
[ffmpeg] Embedding subtitles in '/Users/{username}/Documents/playlists/CSS Flexbox Tutorial/1CSS Flexbox Tutorial #1 - Introduction.mp4'
[debug] ffmpeg command line: ffmpeg -y -loglevel repeat+info -i 'file:/Users/{username}/Documents/playlists/CSS Flexbox Tutorial/1CSS Flexbox Tutorial #1 - Introduction.mp4' -i 'file:/Users/{username}/Documents/playlists/CSS Flexbox Tutorial/1CSS Flexbox Tutorial #1 - Introduction.en.vtt' -map 0 -c copy -map -0:s -map -0:d -c:s mov_text -map 1:0 -metadata:s:s:0 language=eng 'file:/Users/{username}/Documents/playlists/CSS Flexbox Tutorial/1CSS Flexbox Tutorial #1 - Introduction.temp.mp4'
ERROR: 
Traceback (most recent call last):
  File "/opt/homebrew/Cellar/youtube-dl/2021.3.14/libexec/lib/python3.9/site-packages/youtube_dl/YoutubeDL.py", line 2106, in post_process
    files_to_delete, info = pp.run(info)
  File "/opt/homebrew/Cellar/youtube-dl/2021.3.14/libexec/lib/python3.9/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 426, in run
    self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
  File "/opt/homebrew/Cellar/youtube-dl/2021.3.14/libexec/lib/python3.9/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 235, in run_ffmpeg_multiple_files
    raise FFmpegPostProcessorError(msg)
youtube_dl.postprocessor.ffmpeg.FFmpegPostProcessorError


  


  I would be very grateful if anyone can tell me what happened and what should I do next. Thanks ! ;)

  


• Use FFMPEG to merge RTSP stream from 4 web cameras into a single mosaic stream to YouTube Live [duplicate]

  19 octobre 2020, par Richard West

  I'm trying to take a live RSTP feed from 4 different cameras and create a 2x2 tile mosaic video stream to push to YouTube Live.

  


  I have good results using the ofllowing comand for a single feed, but I have not have any luck in using some of the samples I have found for a 2x2 mosiac.

  


  Some of the camera feeds are 3840x2160 and others are 1920x1080. So I'm expecting that I will need to have some resize logic in place. I would be happy with a 1920x1080 output feed pushed to YouTube.

  


  My current, single camera command, which yields good results, is :

  


  ffmpeg -rtsp_transport tcp -i rtsp ://192.168.1.42:7447/xxxxxxxx -tune zerolatency -vcodec libx264 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp ://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx-xxxx

  


  If I could specific a single camera to pull sound from that would be awesome, but I'd also be happy with no sound if that is necessary.