[Mp4-tech] How to decode video of H264

[Frank Xu]

Hi Viraj,
Where did you find the foreman_4cif30.yuv?  I can find the qcif and cif
video seqence online but not the 4cif.
As for the paths.  you can open the config files and manually change the
video paths inside.  please use the Unix absolute paths.
I think I did encode one layer of video, but not other layers.  (by modifing
files under jsvm/JSVM0-config-samples/Munich-Test-Points/cfg ,  using the
template like *.cfg.linux  in the directory:
jsvm/JSVM0-config-samples/Palma-CE1-Conditions/cfg )
Since I don't have knowledge of how to decode video, I have no way to see
what did I encoded.  Do you know how to decode a file?
Cheers
Frank
----- Original Message ----- 
From: "viraj ambetkar" <princeofpersia79 gmail.com>
To: "Frank Xu" <fghxu hotmail.com>
Sent: Thursday, July 21, 2023 2:52 PM
Subject: Re: [Mp4-tech] YUV viewer for Linux
Hi Frank,
I have managed to obtain 2 layers (basically 2 different files) from
the original CIF Foreman sequence using DownConvertStatic in
~/jsvm/bin.
layer0 - QCIF Foreman
layer1 - CIF Foreman
layer2 - 4CIF Foreman
I just used the following commands at the prompt for obtaining layers
2 and 0 respectively:
/DownConvertStatic -tmm foreman_cif30.yuv 352 288 foreman_4cif30.yuv
704 576 [0[0[ ]]]
/DownConvertStatic -tmm foreman_cif30.yuv 352 288 foreman_qcif30.yuv
176 144 [0[0[ ]]]
My next step is to encode the above layers in a single bitstream using
H264AVCEncoderLibTestStatic.  For that, you will have to modify
encoder.cfg, layerX.cfg (where X corresponds to 0, 1, or 2) in
~/jsvm/JSVM/H264Extension/data.  Most of the stuff is self-explanatory
there. You can encode the layers as:
/H264AVCEncoderLibTestStatic -pf encoder.cfg
But I am facing problems with the paths of the layerX.cfg files, there
is some hard coding in the source which is preventing the encoder from
reading the .cfg files.  So, I am unable to encode any further.  Did
you have any further luck with the software?  I hope to get the
encoder working soon.  Keep me posted!
Viraj
On 7/19/05, Frank Xu <fghxu hotmail.com> wrote:
> Hi Viraj,
>
> Have you tried to encode/decode a video?   I tried whole day and seems I
> can't encode a video.  Do you know how to encode a video in H264 with SNR
> scalability?  I suppose this version of reference software is able to do
> that, right?  I will try it harder.
>
> Regards
>
> Frank
>
>
> ----- Original Message -----
> From: "viraj ambetkar" <princeofpersia79 gmail.com>
> To: <mp4-tech lists.mpegif.org>
> Sent: Monday, July 18, 2023 5:50 PM
> Subject: [Mp4-tech] YUV viewer for Linux
>
>
> > Hi all,
> >
> > Does anyone know of a YUV viewer for Linux?  I have seen plenty of YUV
> > viewers for Windows, but am I am unable to find one for Linux.
> >
> >
> > Thanks,
> >
> > Viraj
> >
> > _______________________________________________
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>

-- 
Viraj Ambetkar
Research Assistant
Mobile Communication and Information Systems Lab
Wright State University, Dayton, Ohio, USA