[FFmpeg-soc] [PATCH] xiph packetizer

[Josh Allmann]

On 29 July 2010 23:48, Martin Storsjö <martin at martin.st> wrote:
> On Thu, 29 Jul 2010, Josh Allmann wrote:
>>
>> http://mirrorblender.top-ix.org/peach/bigbuckbunny_movies/big_buck_bunny_480p_stereo.ogg
>
> Hmm, ffplay has some weird issues with this file on OS X, but if hacked to
> request slightly larger YUV overlay buffers from SDL (with a width being a
> multiple of 16), it works fine.
>

Works well on linux.

>> >> Using Theora and Vorbis together with RTSP/RTP, things work well.
>> >> Theora standalone is still full of artifacts around motion with TCP,
>> >> and UDP is a slideshow because of all the dropped packets. Tomorrow,
>> >> I'll copy over the packetization routine from Feng and see if the
>> >> results are more sane.
>> >
>> > Hmm, that sounds really strange. Can you give the command lines that
>> > you've used for these test setups?
>> >
>>
>> ffmpeg -re -i acodec copy -vcodec copy -f rtsp rtsp://localhost/foo.sdp
>>
>> also with -an, -vn, and ?tcp variants.
>>
>> ffplay rtsp://localhost/foo.sdp
>
> Hmm, that's weird, Theora works just fine over TCP for me. Over UDP, I get
> lots of artefacts due to dropped packets, though, but that's probably to
> be expected. Tested it with the latest patch you sent (and with the
> previous one with my local modifications).
>

I don't know exactly what I did, but this round adds in support for
multiple Xiph frames per packet, and the tcp issue is gone. Pebkac
most likely.

The r23231 bug with ogg stream copy/Vorbis pts is still there, but
that's outside the scope of this patch.

Josh
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