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• Youtube DL Unable to get local issuer certificate - CERTIFICATE_VERIFY_FAILED

  24 November 2022, by 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 March 2021, by 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)


  


• Youtube livestream stops receiving video from time to time (ffmpeg)

  15 December 2020, by wht_5005

  I have ip cam, raspberry pi (Ubuntu 18.04.4 LTS (GNU/Linux 5.3.0-1036-raspi2 armv7l)) with ffmpeg (3.4.8-0ubuntu0.2) on board and I am trying to do 24/7 youtube livestream.
I have set up a service that start ffmpeg on boot. It receives rtsp stream from camera and sends it to youtube. Here is the ffmpeg setup:

  


  ffmpeg -thread_queue_size 512 -rtsp_transport tcp -i rtsp://cam_address -c:v copy -af "aresample=async=1:first_pts=0" -c:a aac -ac 2 -ar 44100 -fflags +genpts -f flv rtmp://youtube_address -nostdin -nostats


  


  I have noticed that ffmpeg may accidentally stop working from time to time (rather rarely but still) so the service should restart if ffmpeg crashes. Additionally just in case I have set up a cron job that restarts the service every hour, so if it stops working for some reason and that magic that should bring it up fails it should still get up within an hour.

  


  What bothers me, sometimes it stops working but in an unusual way. The service on raspberry pi is running, ffmpeg is running as well, nethogs shows that ffmpeg is both receiving and sending proper amount of data. Stream status on youtube is all right as if everything was just fine but there is no video there (it looks as if it was still loading/buffering but it is not). Restarting the service does not make it work. However if I stop the service, wait a few seconds and start it again the youtube stream starts working as it is supposed to.

  


  Why such things happen and how can I fix it?