Matroska Demux Issue

[Kevin Paul]

Thanks for your reply. 
So how will the playback start after seek, if the index returned by gst_matroska_read_common_do_index_seek doesn't have a key  frame?

Date: Mon, 14 Jul 2014 11:26:32 -0400
Subject: Re: Matroska Demux Issue
From: luis at debethencourt.com
To: gstreamer-devel at lists.freedesktop.org

If I understand the code correctly the main difference between the two functions is that gst_matroska_demux_search_pos returns a fake index, and gst_matroska_read_common_do_index_seek returns the index object from the table.
The fake index generated by gst_matroska_demux_search_pos is a new object with the information of the previous cluster time.


On 14 July 2014 01:12, Kevin Paul <kevinpaul1985 at hotmail.com> wrote:




Problem : For a particular stream of duration 28 second, once I seek between 10th and 13th seconds, the video plays fast for a couple of seconds and the catches up with audio and plays normally. This doesn't happen if I seek anywhere else.

Analysis : Cluster start positions are at 9.9 and 13.976 second. I frames are present at 9.9, 10.4 and 13.976 second. Cue points are present at every interval of 0.0333 seconds

Once seeked between 10th and 13th second, the search for index is done using function "gst_matroska_read_common_do_index_seek" and it returns cue point closest to the seek location. But I frame is not present to start the video playback. But if I use function "gst_matroska_demux_search_pos", it finds correct position to start playback and seek works normally.

Can someone please help me to understand the difference between these to functions to search for index. Is it fine to use "gst_matroska_demux_search_pos" for finding index instead of "gst_matroska_read_common_do_index_seek"?
 		 	   		  

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