[x264-devel] [about gop paralellism]

[Victor Mateevitsi]

For now, enter this command line:
./x264 <raw input> <resolution> --qp <qp number> --output <output filename>

This will encode your raw input stream into H264 with the default
parameters.

If you want to fine-tune your encoding and choose what to enable and what
not, you can see a list of supported command line options by entering the
following command:
./x264 --longhelp

So, for example if your raw input is input.yuv, your resolution is 720x576
and your output h264 encoded stream want to be encoded.264, you should
write:

./x264 input.yuv 720x576 --qp 26 --output encoded.264



On 10/15/07, RG Nurrahmat <rgnurrahmat at yahoo.com> wrote:
>
> Dear Loren,
>
> I am newbie in x264, and have been spending my days surfing the net to
> look for ways to pass my raw video data to x264 in stream ( no need to open
> a file). Can you show me how to do that? including the parameters needed.
>
> Is it correct that FFMPEG can only decode? but not encode as well? Since I
> have built my FFMPEG to include x264 library.
>
> Thank you.
>
>
> *Loren Merritt <lorenm at u.washington.edu>* wrote:
>
> On Sat, 13 Oct 2007, ½¯Ð˲ý wrote:
>
> > I'm a newbie of x264 and tried to encode yuv sequences on multi-core
> > platforms.
>
> And x264's builtin threading doesn't suffice?
>
> > first I pinned some GOP task on each logical CPUs, and then read a gop
> > for every gop task, when the encoding process is done, the main thread
> > re-order the out-of-order data encoded by the GOP tasks.
> > the result is fine, but when I playback the bitstream, there will be
> > some error information displayed on the information window of videolan
> > client:
> >
> > ffmpeg warning: error while decoding MB 14 13, bytestream (-7)
> > (h264 at 00CEB3C0)
> > ffmpeg debug: concealing 145 DC, 145 AC, 145 MV errors
> > (h264 at 00CEB3C0)
> >
> > any sugestion will be appreciated.
>
> There's nothing in the bitstream format that would prevent arbitrary
> concatenation of GOPs. So it's a bug in your code. And since you haven't
> posted your code, no one can possibly help.
>
> --Loren Merritt_______________________________________________
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