vendredi 6 juin 2014

MPEG DASH: frame seeking


Vote count:

0




TL;DR: Is it possible to achieve frame seeking using DASH? How?


I'm using ffmpeg to create non-multiplexed content:



ffmpeg -y -an -codec:v libx264 -profile:v baseline output_video.mp4 -i video.mp4
ffmpeg -y -vn -codec:a libvo_aacenc -ac 1 -ar 44100 output_audio.mp4 -i video.mp4


Then I'm using mp4box to create DASH content:



mp4box -dash 5000 -frag 1000 -rap -dash-profile live -segment-name mp4-live-$RepresentationID$-$Number$ -out manifest.mpd output_video.mp4 output_audio.mp4


Finally I open the generated content with Chrome, using dash.js. Everything works fine except that I can't do frame seek. I keep on adding (1/frame_rate) seconds to the current time but nothing happens, the frame only changes after 10 seconds.


I suppose this has to do with the video's key interval. However, I am able to do frame seek after the ffmpeg part, so I guess I'm missing something in the mp4box command.


Is it possible to achieve frame seeking using DASH or am I missing something?


Thanks in advance.



asked 53 secs ago

bisc8

594





Aucun commentaire:

Enregistrer un commentaire