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• Encode HEVC/H.265/HDR Video for YouTube from 10bit Pro-Res using FFmpeg

  30 janvier 2018, par Rodrigo Polo

  I want to have an HDR YouTube video published, my source file is either an Apple ProRes or DNxHR using a chroma subsamplig 4:4:4 or full RGB, both 10bit, so the original source file has all what is needed in order to be encoded into a 10bit 4:2:0 H.265/HEVC (HDR).

  I have followed some answers listed here, reviewed lots of different approaches, tried out many different commands without success, colors aren’t right when using only FFmpeg, to much red, when using only Adobe to encode into H.264 with the recommended settings on their support page, the results is darker, here are the commands I’ve using :

  I have tried this :

  ffmpeg \
  
  -i input.mov \
  
  -c:v libx265 \
  
  -tag:v hvc1 \
  
  -crf 21 \
  
  -preset fast \
  
  -pix_fmt yuv420p10le \
  
  -x265-params "colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,10):max-cll=1000,400" \
  
  -c:a libfdk_aac \
  
  -b:a 128k \
  
  -ac 2 \
  
  -ar 44100 \
  
  -movflags +faststart \
  
  output.mp4

  And this :

  ffmpeg \
  
  -y \
  
  -hide_banner \
  
  -i input.mov \
  
  -pix_fmt yuv420p10le \
  
  -vf "scale=out_color_matrix=bt2020:out_h_chr_pos=0:out_v_chr_pos=0,format=yuv420p10" \
  
  -c:v libx265 \
  
  -tag:v hvc1 \
  
  -crf 21 \
  
  -preset fast \
  
  -x265-params 'crf=12:colorprim=bt2020:transfer=smpte-st-2084:colormatrix=bt2020nc:master-display="G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1)":max-cll="1000,400"' \
  
  -c:a libfdk_aac \
  
  -b:a 128k \
  
  -ac 2 \
  
  -ar 44100 \
  
  -movflags +faststart \
  
  output.mp4

  I have also tried using MKVToolNix in order to insert the metadata into the encoded HEVC/H.265 file with the following command :

  /Applications/MKVToolNix-9.7.1.app/Contents/MacOS/mkvmerge \
  
  -o output.mkv \
  
  --colour-matrix 0:9 \
  
  --colour-range 0:1 \
  
  --colour-transfer-characteristics 0:16 \
  
  --colour-primaries 0:9 \
  
  --max-content-light 0:1000 \
  
  --max-frame-light 0:300 \
  
  --max-luminance 0:1000 \
  
  --min-luminance 0:0.01 \
  
  --chromaticity-coordinates 0:0.68,0.32,0.265,0.690,0.15,0.06 \
  
  --white-colour-coordinates 0:0.3127,0.3290 \
  
  input.mp4

  But the result is the same and YouTube don’t recognize the file as an HDR file, it does only with the first FFmpeg command and with the file encoded with Adobe Premiere, but the colors don’t look well, so, maybe I’m getting some concept wrong, thanks for your help.

• Title : FFmpeg and yt-dlp not working on Render.com deployment - Node.js YouTube video processing app

  23 mai, par minhquan lavo

  I'm building a video processing application that :

  


  

  1. Downloads YouTube videos using yt-dlp

  


  2. Processes these videos with FFmpeg for :

     

     • Cutting clips from the original video

     


     • Adding captions/subtitles to the clips

     


     


  


  


  I'm struggling with getting both tools to work on Render.com deployment. Here's my setup :

  


  Backend Stack :

  


  

  • Node.js

  


  • Express

  


  • FFmpeg-related packages :

    

    • @ffmpeg-installer/ffmpeg : ^1.1.0

    


    • @ffprobe-installer/ffprobe : ^2.1.2

    


    • ffmpeg-static : ^5.2.0

    


    • fluent-ffmpeg : ^2.1.2

    


    


  


  • yt-dlp (installed via pip in postinstall)

  


  


  What I've tried :

  


  

  1. Added FFmpeg installation in render.yaml :

  


  


  services:
  - type: web
    name: clipthat-backend
    env: node
    buildCommand: |
      apt-get update && apt-get install -y ffmpeg
      npm install
    startCommand: npm start


  


  

  2. Installing yt-dlp through npm postinstall :

  


  


  "scripts": {
    "postinstall": "pip install yt-dlp"
}


  


  The issues :

  


  

  1. FFmpeg commands fail on Render deployment :

     

     • Can't process video editing tasks (cutting clips)

     


     • Can't add captions to videos

     


     


  


  2. yt-dlp fails to download YouTube videos on deployment
Both tools work perfectly in my local development environment, but fail after deployment to Render.

  


  


  Questions :

  


  

  1. Has anyone successfully deployed a Node.js application using both FFmpeg and yt-dlp on Render.com for video processing ?

  


  2. Are there specific configurations needed for Python-based tools (like yt-dlp) on Render with Node.js apps ?

  


  3. Do I need to modify the build process to properly install Python and pip before the yt-dlp installation ?

  


  4. Is Render.com suitable for this kind of video processing application, or should I consider alternatives like DigitalOcean, AWS, etc.?

  


  


  Any help or guidance would be greatly appreciated ! Let me know if you need any additional information.

  


• Streaming to YouTube using FFmpeg Problems

  9 mai 2016, par jason

  I am trying to stream to a live event I have created inside of YouTube. I am trying to stream a already created video. The command I am using is noted below.

  The problem I have is that YouTube is showing the Streaming status as good (picture attached) and it seems to be receiving the data. But there is no sound and no picture in the live event. I’m not sure what the issue could be.

  ffmpeg -re -y -i input.mp4 -vcodec libx264 -b:v 600k -r 25 -s 640x360 -filter:v yadif -ab 64k -ac 1 -ar 44100 -f flv "rtmp://a.rtmp.youtube.com/live2/KEY"

  Image showing YouTube streaming status :

  

  Console output :

  ffmpeg version N-60321-g4d7d9a5 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Feb  2 2014 22:01:03 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 63.100 / 52. 63.100
  
    libavcodec     55. 49.101 / 55. 49.101
  
    libavformat    55. 29.101 / 55. 29.101
  
    libavdevice    55.  7.100 / 55.  7.100
  
    libavfilter     4.  1.102 /  4.  1.102
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2013-10-24 05:44:23
  
    Duration: 00:41:52.93, start: 0.000000, bitrate: 187 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu
  
  v420p, 480x360, 89 kb/s, 15 fps, 15 tbr, 30 tbn, 30 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 96
  
   kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-10-24 05:44:39
  
        handler_name    : IsoMedia File Produced by Google, 5-11-2011
  
  [libx264 @ 040fdc40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2
  
   FMA3 LZCNT BMI2
  
  [libx264 @ 040fdc40] profile High, level 3.0
  
  [libx264 @ 040fdc40] 264 - core 142 r2389 956c8d8 - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
  
  lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
  
  e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
  
  ma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1
  
  interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
  
   b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=75 keyint_min=38 scenec
  
  ut=0 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1200 ratetol=1.0 qc
  
  omp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/keyname':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      encoder         : Lavf55.29.101
  
      Stream #0:0(und): Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 85
  
  4x480, q=-1--1, 1200 kb/s, 1k tbn, 25 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz,
  
   mono, fltp, 64 kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-10-24 05:44:39
  
        handler_name    : IsoMedia File Produced by Google, 5-11-2011
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (aac -> libmp3lame)
  
  Press [q] to stop, [?] for help
  
  frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:00.39 bitrate=   9.2kbits/s
  
  ...
  
  frame=  463 fps=7.8 q=0.0 size=    1534kB time=00:00:31.66 bitrate= 396.8kbits/s
  
  [flv @ 040fd6e0] Failed to update header with correct duration.
  
  [flv @ 040fd6e0] Failed to update header with correct filesize.
  
  frame=  463 fps=6.8 q=-1.0 Lsize=    2055kB time=00:00:31.79 bitrate= 529.6kbits
  
  /s
  
  video:1778kB audio:249kB subtitle:0 data:0 global headers:0kB muxing overhead 1.
  
  405947%
  
  [libx264 @ 040fdc40] frame I:7     Avg QP: 2.24  size: 44703
  
  [libx264 @ 040fdc40] frame P:153   Avg QP: 0.65  size:  8418
  
  [libx264 @ 040fdc40] frame B:303   Avg QP: 5.74  size:   724
  
  [libx264 @ 040fdc40] consecutive B-frames: 11.9%  2.6%  0.0% 85.5%
  
  [libx264 @ 040fdc40] mb I  I16..4: 66.0% 12.4% 21.6%
  
  [libx264 @ 040fdc40] mb P  I16..4:  4.7%  0.8%  1.5%  P16..4:  6.6%  1.1%  1.1%
  
   0.0%  0.0%    skip:84.2%
  
  [libx264 @ 040fdc40] mb B  I16..4:  0.2%  0.0%  0.1%  B16..8:  3.0%  0.2%  0.1%
  
   direct: 0.6%  skip:95.8%  L0:47.7% L1:49.2% BI: 3.0%
  
  [libx264 @ 040fdc40] final ratefactor: -9.42
  
  [libx264 @ 040fdc40] 8x8 transform intra:11.8% inter:35.4%
  
  [libx264 @ 040fdc40] coded y,uvDC,uvAC intra: 33.7% 11.2% 11.1% inter: 2.6% 1.6%
  
   1.6%
  
  [libx264 @ 040fdc40] i16 v,h,dc,p: 13% 86%  0%  0%
  
  [libx264 @ 040fdc40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  9% 74% 11%  0%  1%  1%  1%
  
   1%  2%
  
  [libx264 @ 040fdc40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 61%  6%  1%  3%  2%  4%
  
   2%  4%
  
  [libx264 @ 040fdc40] i8c dc,h,v,p: 88% 10%  2%  0%
  
  [libx264 @ 040fdc40] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 040fdc40] ref P L0: 81.7%  9.4%  8.0%  0.9%
  
  [libx264 @ 040fdc40] ref B L0: 78.9% 20.9%  0.2%
  
  [libx264 @ 040fdc40] ref B L1: 99.1%  0.9%
  
  [libx264 @ 040fdc40] kb/s:471.59
  
  Received signal 2: terminating.

  Edit -

  I have now tested the following codes but I still dotn get any picture or sound.. but the health status in youtube still shows good

  I ran this command first

  ffmpeg -i input.mp4 -vcodec libx264 -preset medium -maxrate 3000k -bufsize 6000k -vf "scale=1280:-1,format=yuv420p" -g 50 -acodec libmp3lame -b:a 128k -ac 2 -ar 44100 file.flv

  and then I ran this

  ffmpeg -re -i file.flv -codec copy -f flv rtmp://a.rtmp.youtube.com/live2/<key>
  
  </key>

  I still didnt get any picture

  I also tried the full command in 1

  ffmpeg -re -i input.mp4 -vcodec libx264 -preset veryfast -maxrate 3000k -bufsize 6000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 160k -ac 2 -ar 44100 -f flv rtmp://a.rtmp.youtube.com/live2/<key>  
  
  </key>

  still no joy