[FFmpeg-soc] vp8 de/packetizers

[Luca Barbato]

On 07/30/2010 10:36 AM, Josh Allmann wrote:
> On 30 July 2010 00:22, Martin Storsjö <martin at martin.st> wrote:
>> On Thu, 29 Jul 2010, Josh Allmann wrote:
>>
>>> Here is a packetizer and a depacketizer for VP8 RTP.
>>>
>>> Playback is only semi-smooth; it drops way too many frames. The
>>> depacketizer likes to claim it gets an extra packet after the
>>> frame-end (which is typically one byte smaller than the actual
>>> frame-end packet). Still a work in progress.
>>
>> Didn't feel any significant frame dropping here (btw, if playing with
>> ffplay, make sure you use -noframedrop, sometimes ffplay constantly feels
>> it's behind and needs to drop some frames to catch up, but since the
>> source is realtime, it still has to block for more frames, so it
>> constantly drops frames), but the playback console is spammed with
>> messages like this:
>>
>> [vp8 @ 0x10188fe00] Unknown profile 6
>> [vp8 @ 0x10188fe00] Header size larger than data provided
>> [rtsp @ 0x10202dc00] Received no start marker; dropping frame
>>
> 
> -noframedrop helped, but the last message is what I am concerned with;
> it really should not happen. Those seem like phantom packets.
> 

Assert on it and see what's the content of buf.

You end up there if you miss the start packet.

btw do we cleanup when the seqno jumps?

1 2 3 4 5 6 7 8 9
S _ _ _ E S _ _ E

What happens when we miss both 5 and 6 ?

lu

-- 

Luca Barbato
Gentoo/linux
http://dev.gentoo.org/~lu_zero