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• ffmpeg command leads to audio stream lost in conversion

  3 janvier 2023, par Sebastien Boulnois

  I have been exploring at a high level the concept of 360 videos for VR purposes and have been searching how to compress them in a way that my Oculus Quest 2 likes.

  


  I have been advised to use ffmpeg to do these kind of conversion. My initial file is a .mov file that I exported using ProRes422. My desired output is a compressed, optimized mp4 file for Oculus purposes.

  


  Here is the command line I used (simple copy paste from a person who was doing what I wanted to achieve) :

  


  ffmpeg -i input.mov -c:v libx264 -preset slow -crf 18 -maxrate 100M -bufsize 200M -pix_fmt yuv420p -an -movflags faststart output.mp4

  


  The compression works, the video quality is amazing. However, I lose the audio stream, which I really need.

  


  Here is the version of ffmpeg I currently have on my Mac :
ffmpeg current version on my mac

  


  Do you people know how to fix this issue ?

  


  I am just not sure how to proceed from here. I did not try anything specific.

  


• Jellyfin ffmpeg permission denied

  11 septembre 2022, par Steve

  I am running Jellyfin on a Raspberry Pi 4 in a docker container (https://hub.docker.com/r/linuxserver/jellyfin) and am trying to set up hardware accelerated video transcoding. I'm fairly certain I have set up the video devices & permissions correctly, but I am getting the following exception in the logs when trying to play a video through the web interface :

  


  


  


  /usr/lib/jellyfin-ffmpeg/ffmpeg -analyzeduration 200M -autorotate 0 -i file:"/data/tvshows/Ed, Edd n' Eddy/Season 1 (1999)/Ed, Edd n Eddy - S01 E01-E02 - The Ed-Touchables and Nagged to Ed (1080p - HMax Web-DL).mp4" -map_metadata -1 -map_chapters -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 h264_v4l2m2m -b:v 2616000 -maxrate 2616000 -bufsize 5232000 -level 41 -force_key_frames:0 "expr:gte(t,0+n_forced*3)" -g:v:0 90 -keyint_min:v:0 90 -vf "setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\,ih*a)\,1280)/64)*64:trunc(ow/a/2)*2,format=yuv420p" -codec:a:0 libfdk_aac -ac 2 -ab 384000 -copyts -avoid_negative_ts disabled -max_muxing_queue_size 2048 -f hls -max_delay 5000000 -hls_time 3 -hls_segment_type mpegts -start_number 0 -hls_segment_filename "/config/data/transcodes/575d44f8f0e15b3bc459c5289dfcdf9b%d.ts" -hls_playlist_type vod -hls_list_size 0 -y "/config/data/transcodes/575d44f8f0e15b3bc459c5289dfcdf9b.m3u8"


ffmpeg version 5.1.1-Jellyfin Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: --prefix=/usr/lib/jellyfin-ffmpeg --target-os=linux --extra-libs=-lfftw3f --extra-version=Jellyfin --disable-doc --disable-ffplay --disable-ptx-compression --disable-shared --disable-libxcb --disable-sdl2 --disable-xlib --enable-lto --enable-gpl --enable-version3 --enable-static --enable-gmp --enable-gnutls --enable-chromaprint --enable-libdrm --enable-libass --enable-libfreetype --enable-libfribidi --enable-libfontconfig --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libdav1d --enable-libwebp --enable-libvpx --enable-libx264 --enable-libx265 --enable-libzvbi --enable-libzimg --enable-libfdk-aac --toolchain=hardened --enable-cross-compile --arch=arm64 --cross-prefix=/usr/bin/aarch64-linux-gnu-
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
file:/data/tvshows/Ed, Edd n' Eddy/Season 1 (1999)/Ed, Edd n Eddy - S01 E01-E02 - The Ed-Touchables and Nagged to Ed (1080p - HMax Web-DL).mp4: Permission denied

  


  


  



  The real head-scratcher is that if I log in to the docker container with docker exec -it  /bin/bash and paste the ffmpeg command from the logs and run it, it works fine.

  


  I'm running as the jellyfin user, which is in the video group, and has read/write access to the media directory.

  


  Any thoughts ?

  


  My docker-compose file is attached below, if any other system information is needed let me know.

  


  


  


  ---
version: "2.1"
services:
  jellyfin:
    image: lscr.io/linuxserver/jellyfin:latest
    container_name: jellyfin
    environment:
      - PUID=1002
      - PGID=1002
      - TZ=America/Chicago
      - JELLYFIN_PublishedServerUrl=nas-server.local #optional
    volumes:
      - /mnt/raid/tv:/data/tvshows
      - /mnt/raid/movies:/data/movies
      - /mnt/raid/docker/linuxserver/jellyfin/config:/config
    ports:
      - 8096:8096
      - 8920:8920 #optional
      - 7359:7359/udp #optional
      - 1900:1900/udp #optional
    devices:
      - /dev/video10:/dev/video10
      - /dev/video11:/dev/video11
      - /dev/video12:/dev/video12
      - /dev/video13:/dev/video13
      - /dev/video14:/dev/video14
      - /dev/video15:/dev/video15
      - /dev/video16:/dev/video16
      - /dev/video18:/dev/video18
      - /dev/video19:/dev/video19
      - /dev/video20:/dev/video20
      - /dev/video21:/dev/video21
      - /dev/video22:/dev/video22
      - /dev/video23:/dev/video23
      - /dev/video31:/dev/video31
    restart: unless-stopped

  


  


  



• does ffmpeg allocate memory and will not release immediately when encoding and decoding ?

  24 juin 2021, par Tangtoo

  i want to transform videos to jpeg and wav as output. I wrote the programm by myself with FFmpeg-api. The video(.webm e.g.) is decoded and video and audio frames are encoded to jpeg and wav. With running of the program, more and more videos are converted but more and more rss are used(top cmd in linux).

  


  I have also used valgrind to test if there is memory leak. And there is None.

  


  The rss increases not linear and like follows(just example) :

  


  1 video : 30m
2 video : 150m
3 video : 200m
4 video : 220m
5 video : 220m
6 video : 230m

  


  The programm run in docker container and k8s with memory limit(2G). After days(about 30000 videos are processed for example) the pod will be force restarted.

  


  Is it real memory leak ? Or these memory are keeped by ffmpeg lib as memory pool or something ?
Thanks