As a result of my work, I would like to propose a new flag for the stream:<br><br>STREAM_CAN_EXACTSEEK<br><br>- the proposed meaning of this flag is that within the stream one can seek exactly to any given frame without artifacts in the frame. This flag must be settable by the demuxer plugin, and is not fixed - for example you could have a container with two video streams one after the other, the first could set this flag and the second (using a different codec) could be not seekable.<br>
<br>Rationale:<br>I understand that you are creating libvlc with the intention of this being used for video editing applications. I know from my own experience with LiVES that such applications require demuxers which can deliver the exact frame requested, so generally one would need to look at STREAM_CAN_EXACTSEEK | STREAM_CAN_FASTSEEK to see if the stream is immediately usable or requires further processing (caching, indexing, etc).<br>
<br><br><br>Regards,<br>Gabriel.<br><br><br><br><br clear="all"><br><a href="http://lives.sourceforge.net">http://lives.sourceforge.net</a><br><a href="https://www.ohloh.net/accounts/salsaman">https://www.ohloh.net/accounts/salsaman</a><br>
<br>
<br><br><div class="gmail_quote">On Wed, Jun 9, 2010 at 10:37 AM, salsaman <span dir="ltr"><<a href="mailto:salsaman@gmail.com">salsaman@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
You could also try uncommenting some of the fprintf in oggseek.c and seeing what happens.<br><br>You should see it homing in on the keyframe before the target frame.<div class="im"><br><br>Gabriel.<br><br clear="all"><br>
<a href="http://lives.sourceforge.net" target="_blank">http://lives.sourceforge.net</a><br>
<a href="https://www.ohloh.net/accounts/salsaman" target="_blank">https://www.ohloh.net/accounts/salsaman</a><br><br>
<br><br></div><div><div></div><div class="h5"><div class="gmail_quote">On Wed, Jun 9, 2010 at 10:19 AM, salsaman <span dir="ltr"><<a href="mailto:salsaman@gmail.com" target="_blank">salsaman@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
OK, here is the patch updated with FASTSEEK.<br><br>If you are seeing problems even after downloading elephants dream, then I think there is some other problem. Maybe you are using a different demuxer (avformat ?) instead of the ogg demuxer ?<div>
<br>
<br><br>Regards,<br>Gabriel.<br clear="all"><br><a href="http://lives.sourceforge.net" target="_blank">http://lives.sourceforge.net</a><br><a href="https://www.ohloh.net/accounts/salsaman" target="_blank">https://www.ohloh.net/accounts/salsaman</a><br>
<br>
<br><br></div><div class="gmail_quote"><div><div></div><div>On Wed, Jun 9, 2010 at 3:52 AM, Ilkka Ollakka <span dir="ltr"><<a href="mailto:ileoo@videolan.org" target="_blank">ileoo@videolan.org</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div></div><div>
<div>On Tue, Jun 08, 2010 at 07:28:27PM -0300, salsaman wrote:<br>
> Please check back in this thread. I asked how to tell if we are dealing<br>
> with a stream or a file, and I was told to use stream_Control( stream_t *,<br>
> STREAM_CAN_SEEK, &boolean );<br>
<br>
</div>Hi,<br>
<br>
You don't really need to know if access has file or stream coming in do<br>
you? Seems that you just need to know if it can be seeked (fast in this<br>
case seems like the info you need ) so STREAM_CAN_FASTSEEK would tell you if<br>
seeking is really a fast one (like local files etc) or not (not able to<br>
seek, or slow seek like in http-case).<br>
<br>
I think there could be still seeking problem even with local files. I<br>
tried that elephantsdream as local file, and it behaved same as behind<br>
http, so maybe patch is missing some boundary limit, or I just had some<br>
other problem in that case. I'll try to test more tonight.<br>
<font color="#888888"><br>
--<br>
Ilkka Ollakka<br>
"I've seen, I SAY, I've seen better heads on a mug of beer"<br>
-- Senator Claghorn<br>
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