Recherche avancée

Sur d’autres sites (10557)

• idb & Ffmpeg hls video is taking lot of time to start creating video

  24 avril 2024, par aksh02

  I'm trying to capture a simulator's screen using idb & ffmpeg with the command

  


  idb video-stream --fps 15 --format h264 --compression-quality 1.0 --udid <udid> | ffmpeg -i pipe:0 -vcodec libx264 -threads 1 -crf 40 -preset ultrafast -f hls -g 30 -hls_list_size 0 -hls_time 5 -r 15 ./index.m3u8&#xA;</udid>

  


  This is taking around 15s to create the index.m3u8 file resulting in the loss of first 15 seconds of video.
I've tried adding

  


  -tune zerolatency


  


  but this too has no effect.
Idb starts video streaming right away on its own. Need help triaging why ffmpeg is processing it so late. The output ffmpeg provides when it eventually starts writing to ts files

  


  Input #0, h264, from 'pipe:0':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuvj420p(pc, progressive), 1178x2556, 25 fps, 25 tbr, 1200k tbn, 50 tbc


  


  ffmpeg -version

  


  ffmpeg version N-92246-gc2ac3b8e6a-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
built with Apple LLVM version 10.0.0 (clang-1000.11.45.2)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
libavutil      56. 19.101 / 56. 19.101
libavcodec     58. 33.102 / 58. 33.102
libavformat    58. 19.102 / 58. 19.102
libavdevice    58.  4.106 / 58.  4.106
libavfilter     7. 37.100 /  7. 37.100
libswscale      5.  2.100 /  5.  2.100
libswresample   3.  2.100 /  3.  2.100
libpostproc    55.  2.100 / 55.  2.100


  


• Cannot use FFmpeg in Xcode iOS Project (file .h not found)

  19 mars 2016, par BlackBox

  I followed almost step by step this guide.

  Almost because I downloaded, as a user suggested, ffmpeg ios library already built from here

  I followed from "Linking static libraries in Xcode" but I cannot import anyway the header files of ffmpeg. (So I got the .a files)

  For example

  #include "avformat.h"
  
  // or
  
  #import "libavformat/avformat.h"
  
  // or
  
  #import <libavformat></libavformat>avformat.h>

  Everything that I use does not work.

  I specify that those .a files are currently in my project directory, indeed, if I import the .a file, it doesn’t complain that it isn’t found, but when compiling, it complains about UTF-8 stuff because .a files are object libraries and cannot be imported that way.

  I put also the Header Search Paths for the project as it was suggested and the config.log file but nothing.

  Also I see libraries are missing from every project example of FFmpeg I was able to find on GitHub.

  Any ideas ?

• Need help transcoding Red5 RTMP stream to MPEG2-TS

  5 février 2014, par reyniraron

  Me and my friend are going to make live shows and for that purpose I have set up a Red5 server on my old 2006 Intel Core Duo Mac mini running Mac OS X Snow Leopard Server 10.6.8.

  I use Flash Media Live Encoder to broadcast to Red5's oflaDemo application and the stream works great, except for the fact that I want the stream to work with iOS.
  I am developing an app for it, but I still need to convert my stream to Apple's HTTP Live Streaming protocol for it to work.
  Can anybody help me convert the RTMP stream to MPEG2-TS, because that's the format that mediastreamsegmenter supports ? I already have Apple's HTTP Live Streaming Tools installed on the server, so the segmenter's not a problem.

  FFmpeg doesn't work, at least not with the code I found here. With it a always get an "Operation not permitted" error. Xuggler doesn't work, not even with a Linux box.
  Can anybody please help me ? I'd really, really appreciate it.

  -Reynir Aron