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• bash script with conditional arguments and output pipe not working [duplicate]

  19 décembre 2022, par Pavel

  Can u please help me with bash script for ffmpeg ?
Trying to create condition based on args to play OR save media to file, so I've created this kind of IF :

  


  #!/bin/bash

if [ "$1" == "play" ]; then
    POSTFIX="-f matroska - | mpv -"
else
    POSTFIX="-y $OUTPUT"
fi

ffmpeg \
  # skipped personal ffmpeg stuff
  "$POSTFIX"


  


  Now when I try to run it with "play" argument it says :

  


  Unrecognized option 'f matroska - | mpv -'.


  


  So if I add this POSTFIX both variants to command everything works fine...

  


  It looks like something in my bash screens this args or something like that ? Also I don't see in error this dash symbol before f option

  


• Stream mp4 file with watermark through a web using ffmpeg

  24 mars 2023, par Jose A. Matarán

  I'm having problems with ffmpeg, probably due to my inexperience with this software.

  


  My basic need is the following : I have a series of videos with material that I want to protect so that it is not plagiarized. For this I want to add a watermark so that when a user views it, they also see some personal data that prevents them from downloading and sharing it without permission.

  


  What I would like is to create a small Angular + Java application that does this task (invoking ffmpeg via Runtime#exec)

  


  I have seen that from ffmpeg I can emit to a server, like ffserver but I wonder if there is a somewhat simpler way. Something like launching the ffmpeg command from my java application with the necessary configuration and having ffmpeg emit the video along with the watermark through some port/protocol.

  


  EDIT

  


  I have continued to investigate and I have seen that ffmpeg allows you to broadcast for WebRTC, but you need an adapter. What I would like and I don't know if it is possible is to launch ffmpeg so that it acts as a server and it can be consumed from the web.

  


• sws/rgb2rgb : fix unaligned accesses in R-V V YUYV to I422p

  9 novembre 2023, par Rémi Denis-Courmont

  sws/rgb2rgb : fix unaligned accesses in R-V V YUYV to I422p
  In my personal opinion, we should not need to support unaligned YUY2
  
  pixel maps. They should always be aligned to at least 32 bits, and the
  
  current code assumes just 16 bits. However checkasm does test for
  
  unaligned input bitmaps. QEMU accepts it, but real hardware dose not.
  In this particular case, we can at the same time improve performance and
  
  handle unaligned inputs, so do just that.
  uyvytoyuv422_c :      104379.0
  
  uyvytoyuv422_c :      104060.0
  
  uyvytoyuv422_rvv_i32 : 25284.0 (before)
  
  uyvytoyuv422_rvv_i32 : 19303.2 (after)
  

  • [DH] libswscale/riscv/rgb2rgb.c
  • [DH] libswscale/riscv/rgb2rgb_rvv.S