[Sumover-dev] Re: Vic H264 compilation issues

[Piers O'Hanlon]

Hi Doug,

I think this is probably down to differences between different
versions of ffmpeg - it seems that the latest versions (which I was
using) of ffmpeg from svn (r17944 - r18038) no longer contain the
-enable-swscaler configure option (its isn't present in the configure
file) and swscaler is now built by default. However the ffmpeg-0.5
release does include the --enable-swscale configure option. Does that
help to explain the problem?

I think enable-swscale should probably be put back into configure as I
think the suggestion of using the 0.5 release is best as otherwise
we'll keep having to fix vic whenever ffmpeg changes.

It's shame that there's a problem with Xvideo and Xineramma - is there
any workaround? The performance without Xvideo on Linux is
dramatically worse above CIF resolutions - my dual CPU machine could
not keep up with a VGA resolution H264 stream when not using Xvideo,
however with it enabled it was able to comfortably decode up to
960x720....

Piers.

On 18/03/2009, Douglas Kosovic <douglask at itee.uq.edu.au> wrote:
> Hi Piers,
>
>>>  Thanks for your feedback. The issues you were seeing were largely down
>>> to
>>>> changes in ffmpeg - it is a fast changing library. However there was
>>>> also an
>>>> error in vic' s configure script which I have now corrected - VIC's
>>>> configure script calls ffmpeg's configure script which sets things up so
>>>> that the ffmpeg libraries are installed into the local directory - thus
>>>> not
>>>> needed root access. I've updated the repository to reflect the updates.
>>>>
>>> With the recent removal of --enable-swscale in the configure script, I
>>> now
>>> get black thumbnails and video windows. Odd thing is that if MPEG-4
>>> transmission is enabled, then the thumbnails and videos suddenly start
>>> working and are no longer black (selecting other codecs doesn't have the
>>> same fixing effect).
>>>
>>> It doesn't seem to matter if I'm using ffmpeg 0.5 or an earlier one, once
>>> I
>>> rebuild with --enable-swscale, VIC works fine.
>>
>>
>> That's strange -  what OS are seeing on? I'm running it ok on Ubuntu 8.04
>> 32
>> bit. I just committed some new changes for the latest IOCOM compatibility
>> -
>> and now have it decoding 960x720 H264 displaying on Ubuntu using Xvideo -
>> tested ok on Linux and OSX and Vista.
>>
>> I have seen that black window problem before - usually it was fixed by
>> doing
>> a make clean and then rebuilding.
>
> I'm seeing it on several versions of Fedora, 32bit or 64bit. I don't
> enable the Xvideo option as it has issues with Xineramma when different
> GPUs are used. I'll look into it some more.
>
> I'll release new Fedora VIC RPMs with the latest IOCOM compatibility,
> but with --enable-swscale
>
>
> Cheers,
> Doug
>