[Live-devel] What is the correct way to use OutPacketBuffer::increaseMaxSizeTo when fFrameSize > fMaxsize?

[Matthew Czarnek]

Hi Blake, I've been using a maxSize of 600,000 which hasn't had problems
other than this specific video and I suspect  this should be plenty for our
application. I'm testing at the moment using a 4k flv video that has h264
frames that is being read by my own custom ffmpeg file reader. Biggest
frames I'm seeing are 620,000. Think I'm going to quadruple it just in case
we see 8k and set it to 2,500,000.

The problem for me is that even truncating the frame the way I believe
should be correct (probably it is my mistake) it's still crashing
sometimes. Meaning if this is ever exceeded, Live555 throws an exception
that could affect other streams and take down the entire server, so guess
I'll have to find a way to split them at some point. But for the moment
this should fix the problem and be fine.

Would be really nice if Live555 could handle automatic resizing of this
buffer if it is ever too small.

Thanks Ross.

On Mon, Jul 13, 2020 at 1:47 PM Blake Senftner <bsenftner at cyberextruder.com>
wrote:

> Just curious, Matthew, what is the resolution of the media you’re
> streaming?
>
>
>
> For my own needs, I’m using an OutPacketBuffer::maxSize Of 400000.
>
>
>
> That value was arrived after sampling of 1920x1080 streams of the type of
> video we process.
>
> I know my OutPacketBuffer::maxSize determination is naive.
>
>
>
> What are others using to determine the max size of their buffers?
>
>
>
> Blake Senftner
>
> Sr. Software Scientist | CyberExtruder
>
> bsenftner at cyberextruder.com
>
>
>
> *From:* live-devel <live-devel-bounces at us.live555.com> * On Behalf Of *Matthew
> Czarnek
> *Sent:* Monday, July 13, 2020 9:11 AM
> *To:* LIVE555 Streaming Media - development & use <
> live-devel at us.live555.com>
> *Subject:* Re: [Live-devel] What is the correct way to use
> OutPacketBuffer::increaseMaxSizeTo when fFrameSize > fMaxsize?
>
>
>
> You are saying I shouldn't be trying to stream frames that are that large,
> but I get a frame that large from iframes that I'm reading from the file..
> I saw in another post that large frames should be split into small NAL
> packets. Is it possible to split that iframe into pieces using Live555? I
> assume it's not as easy as just sending the bytes that weren't sent as the
> next frame(s)?
>
>
>
> On Fri, Jul 10, 2020 at 7:17 PM Ross Finlayson <finlayson at live555.com>
> wrote:
>
> > A frame comes in that has a size of 616969
>
> You shouldn’t be trying to stream frames this large.
>
>
> > Is there a way to increase fMaxSize midstream?
>
> “fMaxSize” is set by the downstream object (to specify the maximum size of
> the buffer that it provides, when it calls “getNextFrame()”).  To
> “doGetNextFrame()” (i.e., the handling by the upstream object), it is
> simply an ‘in’ variable, and so “doGetNextFrame()”  shouldn’t change it
> (and certainly shouldn’t increase it).
>
>
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
>
>
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel
>
>
>
>
> --
>
> Matthew Czarnek
>
> (814) 421-6770
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel
>


-- 
Matthew Czarnek
(814) 421-6770
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.live555.com/pipermail/live-devel/attachments/20200713/6c65dc80/attachment-0001.htm>