Recherche avancée

Sur d’autres sites (8824)

• lavf/matroska : Add functions for WebM DASH Manifest

  7 juillet 2014, par Vignesh Venkatasubramanian

  lavf/matroska : Add functions for WebM DASH Manifest
  Add functions and logic to matroskadec for use by the WebM DASH Manifest
  
  XML Muxer. The actual muxer is added in a future patch.
  Signed-off-by : Vignesh Venkatasubramanian <vigneshv@google.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/matroska.h
  • [DH] libavformat/matroskadec.c

• FFMPEG UDP to DASH I am wondering if it could be written more efficiently ?

  18 mars 2019, par c7borg

  I have the below working but it is quite cpu intensive I’ve just moved to ffmpeg 3.4 and was wondering if it could be written more efficently ?

  The below takes a multicast stream from our local LAN avoids the choppy footage by using the scenecut then adjusts the audio with the async to keep it in time and uses the yadif to deinterlace to provide better quality. This command/script also trims the maximum number of segments otherwise with a live stream it would fill up the directory.

  If anyone has any improvements I’d much appreciate it

  I also add subtitles using -filter_complex "[0:v][0:s]overlay" but this conflicts with the -vf yadif option.

  ffmpeg -i \
  
  "udp://@239.192.4.5:1234?overrun_nonfatal=1&fifo_size=50000000" \
  
  -acodec aac -strict -2 -vcodec libx264 \
  
  -vf yadif \
  
  -af aresample=async=1 \
  
  -x264opts 'keyint=25:scenecut=-1' \
  
  -window_size 10 -extra_window_size 10 \
  
  -f dash /var/www/html/stream/out.mpd

  If it can’t be written more efficiently at least this may help others as it took me a long time to get this far. For reference I use shaka player in chromium for the client side

• FFMPEG DASH Issues

  5 octobre 2022, par user726720

  I have a couple of questions regarding ffmpeg.

  


  


  1. First is i can't seem to get the frame rate correctly.

     


     

     


     I'm expecting 25, i have tried both , both give me the same result.

     


     -r 25 and -filter:v fps=25


     


     Here is my complete command im using

     


     ffmpeg -re -i file.mxf -pix_fmt yuv420p -vsync 1 -map 0:v:0 -map 0:a:0 -c:a aac -c:v libx264 -use_template 1 -use_timeline 1 -init_seg_name  "init-stream$RepresentationID$-$Bandwidth$.mp4" -media_seg_name "chunk-stream$RepresentationID$-$Number%05d$.$ext$" -b:v 2000k -b:a 48k -ac 2 -profile:v main -level:v 3.0 -s 640x360  -filter:v fps=25 -vsync passthrough -increment_tc 1 -adaptation_sets "id=0,streams=v id=1,streams=a" -g 100 -keyint_min 100 -seg_duration 5 -frag_duration 5 -dash_segment_type auto -f dash stream.mpd


     


  


  2. My second question is related to the use of audio, with the above command im acheiving the below results, with the use of AAC

     


     

     


     But my target is to acheive the below, how do i go about this

     


     

     


     

     3. How do i change the muxing mode to dash

     


     


     

     


     Like the below