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• 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.

  


• Youtube DL Unable to get local issuer certificate - CERTIFICATE_VERIFY_FAILED

  24 novembre 2022, par Casper Kristiansson

  I'm trying to use youtube DL with FFmpeg to download an m3u8 stream. Just recently I started receiving this error :

  


  ERROR: Unable to download webpage: <urlopen error="error" verify="verify" unable="unable" to="to" get="get" local="local" issuer="issuer" certificate="certificate">&#xA;(caused by URLError(SSLCertVerificationError(1,&#xA;&#x27;[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed:&#xA;unable to get local issuer certificate (_ssl.c:992)&#x27;)))&#xA;</urlopen>

  


  I know Youtube DL supports an option for nocheckcertificate but by enabling this after a couple of minutes the target machine will refuse the connection. When trying to use the same m3u8 stream on another computer, I could download the stream without any issues.

  


  I know that someone from Youtubedl CERTIFICATE_VERIFY_FAILED suggested fixing "your system's CA certificate list". What is the process of doing this ?

  


  I tried upgrading/reinstalling python and reinstalling the latest Windows update

  


  I also want to mention that there hasn't been any issue with downloading for the past year but recently stumbled upon this when switching proxy providers. But because the same setup works on another PC without any issue it's probably not the reason.

  


  The system the program is running on is Windows

  


  Edit : Another note is that downloading other public m3u8 streams works perfectly fine, so the problem is probably with the system CA SSL.

  


• Forward youtube-dl output to ffmpeg with hardware-accelerated encoding [closed]

  16 mars 2021, par Yehor

  I'm trying to download some videos from youtube and simultaneously forward those to ffmpeg for hardware decoding to h265 (just for purpose of seeing how it works).

  


  My command, that works, but uses (as I understand) software encoding :

  


  youtube-dl -o "./%(playlist)s/%(title)s.%(ext)s" --merge-output-format mkv --postprocessor-args "-c:v libx265 -c:a opus -strict experimental" "target_url"


  


  When I specify the hardware acceleration, I receive the error "Invalid argument". The command is :

  


  youtube-dl -o "./%(playlist)s/%(title)s.%(ext)s" --merge-output-format mkv --postprocessor-args "-hwaccel cuda -c:v hevc_nvenc -c:a opus -strict experimental" "target_url"


  


  What I've done wrong ?

  


  System info :

  


  

  • OS : Windows 10 x64

  


  • GPU : Nvidia GeForce 960M (installed the latest driver and CUDA) and should be supported by CUDA

  


  • latest youtube-dl and ffmpeg build

  


  


  The ffmpeg -encoders output contains 265 codecs, so they also should be supported :

  


  V..... libx265              libx265 H.265 / HEVC (codec hevc)
V..... nvenc_hevc           NVIDIA NVENC hevc encoder (codec hevc)
V..... hevc_amf             AMD AMF HEVC encoder (codec hevc)
V..... hevc_nvenc           NVIDIA NVENC hevc encoder (codec hevc)
V..... hevc_qsv             HEVC (Intel Quick Sync Video acceleration) (codec hevc)