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• Mp4 to dynamic adaptive hls with multiple bitrates using ffmpeg

  10 décembre 2023, par Awais fiaz

  I tried converting mp4 video to HLS for online streaming which I have successfully done using FFmpeg.

  



  Command :

  



  ffmpeg -i /var/www/html/file_conversion/heli.mp4 -map 0 -profile:v baseline -level 3.0 -s 640x360 -c:v libx264 -b:v 500k -c:a libfdk_aac -b:a 320k -hls_list_size 0 -start_number 0 -hls_init_time 0 -hls_time 2  -f hls /var/www/html/file_conversion/hlstest2/heli.m3u8


  



  But now I am trying to convert the same video with multiple bitrates for dynamic adaptive streaming.

  



  Any idea how can I achieve this ?

  


• ffmpeg video stream to app c# [on hold]

  3 septembre 2014, par Alexey Medvedev

  I am trying to make a video mixer for online broadcasts. To do this, I use ffmpeg and C #. I had a problem with the transfer of the video stream from ffmpeg to my program. I would like to receive a stream of ffmpeg using network protocols (e.g. TCP, UDP or others) or capturing if from ffplay window, but I don`t how I can do it. Can you give me some ideas ?

  For example, I have command for ffmpeg : "ffmpeg -i video1.mp4 -f mpegts udp:127.0.0.1:5000" or same command with other output formats or network protocols. How i can read video stream from the port and convert it to Bitmap ?
  I need to send video stream from my program from computer A to my program to computer B. I write program on C#. I dont know how I can compress video which I must send between my computers and I decided to use Ffmpeg. Now, I can streaming video from my program in computer A to ffmpeg and compress it with parameters which I need.
  On second computer I can read this steam using ffmpeg or ffplay, but I don`t know how I can get this stream into my program.
  1) How can I get this stream in my program ? Which libraries can you recommend me ?
  2) Do you know any libraries which can compress video, instead of using ffmpeg ?

• Fix compile error on arm4/arm5 platform

  23 septembre 2014, par Bernd Kuhls

  Fix compile error on arm4/arm5 platform
  Since these commits
  
  http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=adf8227cf4e7b4fccb2ad88e1e09b6dc00dd00ed
  
  http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=db7f1c7c5a1d37e7f4da64a79a97bea1c4b6e9f8
  compilation on arm4/arm5 fails :
  libavcodec/libavcodec.so : undefined reference to
  
  `ff_startcode_find_candidate_armv6’
  Because libavcodec/arm/Makefile contains
  
  ARMV6-OBJS-$(CONFIG_STARTCODE)         += arm/startcode_armv6.o
  
  function ff_startcode_find_candidate_armv6 is not included for older ARM
  
  archs. The bug was found during automatic buildroot builds :
  http://autobuild.buildroot.net/results/ec7/ec71e4f16ee9106747dff5f15999cbd17903e76f//build-end.log
  
  Quote from configure summary :
  
  ARCH                      arm (armv4t)
  
  big-endian                no
  
  runtime cpu detection     yes
  
  ARMv5TE enabled           no
  
  ARMv6 enabled             no
  
  ARMv6T2 enabled           no
  http://autobuild.buildroot.net/results/be7/be72eb182eaccf0064a32c9dfc2ac1c0d6555506/build-end.log
  
  ARCH                      arm (armv5te)
  
  big-endian                no
  
  runtime cpu detection     yes
  
  ARMv5TE enabled           yes
  
  ARMv6 enabled             no
  
  ARMv6T2 enabled           no
  This patch provides the necessary #if clauses as discussed with Michael :
  
  https://ffmpeg.org/pipermail/ffmpeg-devel/2014-September/163329.html
  Signed-off-by : Bernd Kuhls <bernd.kuhls@t-online.de>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/arm/h264dsp_init_arm.c
  • [DH] libavcodec/arm/vc1dsp_init_arm.c