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• Error compiling and building DashEncoder code and how to play the .mpd file when generated [closed]

  11 avril 2013, par niuu

  I'm trying to build the DashEncoder code which I downloaded from github https://github.com/slederer/DASHEncoder. Well, I followed all the instructions given in the how to compile dash file. installed Gpac n X264 and compiled both successfully. Then did make of Dashencoder and ran it as ./Dashencoder. But I found some issues in it. Got this log :

  ==========DASH ENCODER===============
  Unknown option in resourcefile : sql-pw :
  current encoder x264
  YES
  x264 encoding @ 300 kbps : Pass 1
  x264 : x264 —profile baseline —preset slow —verbose —fps 24 —vbv-maxrate 300 —vbv-bufsize 600 —scenecut 0 —keyint 48 —output /opt/lampp/htdocs/tests_updates/sintel_trailer_2k_480p24_300kbit.h264 /home/niu/sintel_trailer_2k_480p24.y4m >out.txt 2>&1
  mkdir : cannot create directory

  /opt/lampp/htdocs/tests_updates/sintel_300kbit': File exists
cp: omitting directory

  /opt/lampp/htdocs/tests_updates/'
  copy audio : cp /opt/lampp/htdocs/tests_updates/ /opt/lampp/htdocs/tests_updates/sintel_300kbit/MP4Box multiplexing Video : /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264
  mp4box : MP4Box -add /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264 /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  AVC-H264 import - frame size 854 x 480 at 24.000 FPS
  AVC Import results : 1253 samples - Slices : 27 I 1226 P 0 B - 1 SEI - 27 IDR
  Saving to /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4 : 0.500 secs Interleaving
  MP4Box multiplexing Audio :/opt/lampp/htdocs/tests_updates/sintel_300kbit/
  mp4box : MP4Box -add /opt/lampp/htdocs/tests_updates/sintel_300kbit/ /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  Unknown input file type
  Unknown input file type
  Error importing /opt/lampp/htdocs/tests_updates/sintel_300kbit/ : Bad Parameter
  MP4Box Cleaning ...
  mp4box : MP4Box -no-sys /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  Saving /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4 : 0.500 secs Interleaving
  MP4Box segmentation : /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264
  mp4box : MP4Box -frag 2000 -dash 2000 -rap -segment-name /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  DASH-ing file : 2.00s segments 2.00s fragments single sidx per segment
  Spliting segments at GOP boundaries
  [DASH] Generating MPD at time 2013-03-16T16:40:03Z
  DASHing file /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
  terminate called after throwing an instance of 'std::out_of_range'
  what() : basic_string::substr
  Error : Unable to open MPD file !Aborted
  Why is this error at the end ? and also one folder got created in my /opt/lampp/htdocs/tests_updates/sintel_300kbit. which has two types of files : 27 files of .m4s extension 1 file -sintelinit.mp4 1 file- sintel_trailer_2k_480p24_300kbit.mp4 , which when played in vlc player played the video bt no audio ! &

  1 file- sintel_trailer_2k_480p24_300kbit.h264 which cannot be opened.

  No .mpd file was created.

  Also I want to know aft creating that .mpd file how will i be able to test it on my android client say media player.

  I am damn confused with all this happening. Please help

• How to downscale video using subprocess and then piping the data over to stdout and play using ffplay and save it as well

  2 avril 2021, par ZeroDay Fracture

  I am trying to use ffmpeg to downscale a video and pipe the stdout data to ffplay to play the new downsized video by piping it to ffplay on aws lambda.

  


  This is the command I have so far, but for some reason adding a scale option is not working.

  


  I am trying to run this command locally before I deploy it on python with subprocess command. I need the raw video to be able to save into database for streaming the data in realtime.

  


  %ffmpeg -i sample.mp4  -vf scale=240:-2 -f  mpegts -c:v copy -af aresample=async=1:first_pts=0 - | ffplay -

  


  adding the scale optioin for some reason is saving the video as the name scale=240 :-2 which does not make sense.

  


• Using FFmpeg in C# project

  17 août 2018, par JustLogin

  I’m trying to create a desktop live-streaming app in C#. The program must run under Windows and stream image from user’s desktop to rtmp. There must also be options of framerate, video size, quality and codec (h263 and h264). I think FFmpeg is the best choise for this (if it is not so, please write a comment). I’ve managed to do everything I mentioned above with ffmpeg.exe using console. So I wish to know, can I include FFmpeg library into C# project (as a .lib or .dll) to use it instead of .exe, saving suitable functionality for my task ? I’ll be very grateful for any examples.

  P.S. Here are some examples of commands I use :

  ffmpeg -f dshow -i video=UScreenCapture -vcodec h264 -pix_fmt yuv420p -s 320x240 -f flv rtmp://[my adr]/desc
  
  
  
  ffmpeg -f dshow -i video=UScreenCapture -vcodec h264 -r 15 -t 0:1:00 -q 12 -pix_fmt yuv420p -s 320x240 -f flv rtmp://[my adr]/desc