Sur d’autres sites (7458)

• FFMPEG CONCAT Error

  30 juillet 2020, par DannyTuan

  I need help about ffmpeg concat. Please help me !

  



  I have 3 video, and i want join it with concat.

  



  Demo File : list.txt

  



  file 'a.mp4'
file 'b.mp4'
file 'c.mp4'


  



  Demo File : join.bat

  



  ffmpeg -y -f concat -i "list.txt" -codec copy "join.mp4"


  



  But i get error :

  



  ffmpeg version N-81863-gcced839 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 32.100 / 55. 32.100
  libavcodec     57. 60.101 / 57. 60.101
  libavformat    57. 51.102 / 57. 51.102
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 63.100 /  6. 63.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  2.100 /  2.  2.100
  libpostproc    54.  0.100 / 54.  0.100
[concat @ 00000000024524a0] Line 1: unknown keyword '∩╗┐file'
list.txt: Invalid data found when processing input


  



  I think my computer error. Because, this code working in my laptop.
Please help me to fix it for can working on my computer :(

  


• Encoding of two full hd streams in Linux + GPU with Intel HD4000 / VA API / FFMPEG / OpenGL

  27 juin 2017, par qknight

  i want to encode/stream two full hd streams in realtime from my laptop to a remote location using linux/xorg on the host.

  VA API

  for this i’ve been playing with the VA API but the performance is pretty bad with 5.59 fps (see paste below).

  FFMPEG

  using ffmpeg with CPU encoding i get about 200 fps but then all cores of my Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz are busy and the fan turns on.

  future plans

  i want GPU support in encoding and later integrate this into a program which streams a virtual xorg ’screen’, see https://lastlog.de/wiki/index.php/Raspberry_PI_virtual_screen for more details on my plans.

  maybe h264 isn’t even what i want ? so if someone advices towards a different implementation, i’d welcome that.

  besides VA API there seems to be QuickSync but i didn’t experiment with that yet as it is not packaged on NixOS just yet.

  note : i need a library to have a smooth integration into the code.

  h264encode -w 1920 -h 1080 —profile MPSource frame is 1920x1080 and will code clip to 1920x1088 with crop
  INPUT:Try to encode H264...
  
  INPUT : Resolution : 1920x1080, 60 frames
  
  INPUT : FrameRate : 30
  
  INPUT : Bitrate : 14929920
  
  INPUT : Slieces : 1
  
  INPUT : IntraPeriod : 30
  
  INPUT : IDRPeriod : 60
  
  INPUT : IpPeriod : 1
  
  INPUT : Initial QP : 26
  
  INPUT : Min QP : 0
  
  INPUT : Source YUV : AUTO generated
  
  INPUT : Coded Clip : /tmp/test.264
  
  INPUT : Rec   Clip : Not save reconstructed frame
  libva info : VA-API version 0.38.1
  
  libva info : va_getDriverName() returns 0
  
  libva info : Trying to open /run/opengl-driver/lib/dri/i965_drv_video.so
  
  libva info : Found init function __vaDriverInit_0_38
  
  libva info : va_openDriver() returns 0
  
  Use profile VAProfileH264Main
  
  Support rate control mode (0x12):CBR CQP 
  
  RateControl mode : CQP
  
  Support VAConfigAttribEncPackedHeaders
  
  Support packed sequence headers
  
  Support packed picture headers
  
  Support packed slice headers
  
  Support packed misc headers
  
  Support 1 RefPicList0 and 1 RefPicList1
  
  Loading data into surface 15.....Complete surface loading
  
        \00000059(054456 bytes coded)
  PERFORMANCE :   Frame Rate : 5.59 fps (60 frames, 10730 ms (178.83 ms per frame))
  
  PERFORMANCE :   Compression ratio : 51:1
  
  PERFORMANCE :     UploadPicture : 10467 ms (174.45, 97.55% percent)
  
  PERFORMANCE :     vaBeginPicture : 0 ms (0.00, 0.00% percent)
  
  PERFORMANCE :     vaRenderHeader : 1 ms (0.02, 0.01% percent)
  
  PERFORMANCE :     vaEndPicture : 42 ms (0.70, 0.39% percent)
  
  PERFORMANCE :     vaSyncSurface : 244 ms (4.07, 2.27% percent)
  
  PERFORMANCE :     SavePicture : 7 ms (0.12, 0.07% percent)
  
  PERFORMANCE :     Others : -31 ms (71582787.75, 40027653.91% percent)
  
  (Multithread enabled, the timing is only for reference)
  

  i’ve seen https://www.reddit.com/r/linux/comments/1qk1yu/is_there_currently_opensource_software_to_encode/ though but i’m not sure what do do with it.

• Sending an mp4 video over the network with avconv command to a raspberry pi in a piwall videowall

  21 juillet 2017, par noswoscar

  I would like to send an mp4 video from a raspbery pi to another raspberry-pi (in order to build a piwall) but the command I am using for sending a video stream (tested with correct outcome on other devices) doesn’t work.

  Details :
  I am using the avconv command from libav.org to send an mp4 video from a "master raspberry pi" through the network to my "slave raspberry pi". The raspberry pi (which is receiving the video) has the Raspbian Jessie Operating System on it. The goal of my experiment is to use the pwomxplayer command to display the video received on the "slave raspberry pi".

  The full command i am using for sending the mp4 video stream is as follows :
  avconv -re -i input.mp4 -vcodec libx264 -f h264 -an udp ://224.0.0.1:1234
  (works when sending to my raspberry pi from my dell laptop)

  It is interesting to note that when using the pre-mentioned avconv command on my dell laptop which has an intel processor and debian OS installed, the video stream is sent properly. However, the same command doesn’t work when sending the video stream from a raspberry pi which has an arm processor and raspbian OS installed.
  I wonder why this is !

  Am I right in thinking the arm processor is not interpreting my command avconv as well as the intel processor ? Or is it more a question of architecture ? Or is my avconv command syntax incorrect ?

  Thank you for your help !

  More info :
  Ip address of master raspberry pi : 192.168.72.10
  Ip address of slave raspberry pi : 192.168.72.11
  I am using the route add -net 224.0.0.0 netmask 224.0.0.0 eth0 command on master pi to send the video stream to all laptops connected to my ethernet port.
  The following command works for files ending in .h264 :
  avconv -re -i input.h264 -vcodec libx264 -f h264 -an udp ://224.0.0.1:1234
  (but I would like to send .mp4 files encoded with h264 not just .h264 files)