[gst-devel] ffenc_h264 plug-in ???

[Felipe Contreras]

On Tue, Sep 30, 2008 at 9:15 AM, Edward Hervey <bilboed at gmail.com> wrote:
> On Mon, 2008-09-29 at 21:21 -0300, Alexandre wrote:
>> On Mon, Sep 29, 2008 at 1:19 PM, Edward Hervey <bilboed at gmail.com>
>> wrote:
>>         On Mon, 2008-09-29 at 17:49 +0200, Wim Taymans wrote:
>>         > On Mon, 2008-09-29 at 20:29 +0530, Irfan Shaikh wrote:
>>         > >
>>         > >
>>         > > Hi All,
>>         > >
>>         > >       Can any one please tell me in which package can i
>>         find ffmpeg's
>>         > > H264 encoder plug-in ffenc_h264.
>>         >
>>         > Are you making up element names? That element does not exist
>>         and neither
>>         > does the 'ffmpeg h264 encoder'.
>>
>>
>>          Indeed. I'm guessing he means the h264 encoder used by ffmpeg
>>         ergo...
>>         x264. And for that we have a plugin : x264enc.
>>
>> Or he meant ffenc_h264 or ffdec_h264, both of which can be found in
>> the ffmpeg plugin.
>
>  If you have ffenc_h264 on your distro, that means they're using the
> system wide ffmpeg, most likely compiled with everything-under-the-sun
> support (which includes x264).
>
>  So instead of only having one level of abstraction for using x264
> (gstplugin-x264enc <=> x264), you have two (gstffmpeg <=>
> libavcodec(ffmpeg) <=> x264). Bad for efficiency.
>
>  Oh, and as you might know.. we don't support gst-ffmpeg built with
> system-wide ffmpeg.
>
>  Just use x264enc, please.

So you advocate an element that doesn't work properly vs one that
does, just because it's a GStreamer direct wrapper?

x264enc is in gst-plugins-bad, which suggests it needs work.

By default the output of x264enc looks horrible, I looked at the code
and it turns out the bitrate is assumed in kbit/s when in fact the
param is in bit/s. That wouldn't be a big problem if there wasn't an
artificial limit of 100 * 1024, which means you can't get more than
102.4 kbit/s.

I suggest to do the practical thing and use ffenc_libx264. I've
started an x264enc from scratch, if someone is interested, but it will
take time.

Cheers.

-- 
Felipe Contreras