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DM355 and h263

Giorgio Rascioni
Prodigy 80 points

Hi all,

         we have a DM355 with DVSDK 1.3 that encodes mpeg4 video and we would like to have a support in order to solve two issues.

1) we would like to enable  h263 encoding and we would like to know, steps to do to obtain that. We need to use another dvsdk? we need to change some sources? Please give us right suggests

2) About mpeg4 we would like to know how to act in order to reduce intraframe period (and also to manage other encoder parameter) and how to add VOS and VOSS header as described in http://processors.wiki.ti.com/index.php/DM355_Codecs

Thanks to all for the help

G.

  • 0
    Expert 1640 points

    Hi Giorgio,

    1. To encode in h.263 format, you need to enable SVH format. The procedure is mentioned in the same wiki page that you linked.

    2. The VOS and VOSS headers are not generated by the DM355 Encoder. Your application will have to add the headers to the frame. This encoder only generates an Elementary Stream.

    Regards,

    Akshay

  • 0 in reply to Akshay Panday
    Prodigy 80 points

    Hi Akshay and thank you for the answer, but I need your help. Now I'm trying to build gstreamer plugin using dvsdk3_10 (the last one). In my application infact I use a pipe with the videnc1 gst element. What I would like to do is to have a videnc1 gst element that is able to enconde h263, that is able for mpeg4 to create VOS and also to act in order to change some settings parameters (as for example intraFrameInterval). For what I think I have to make some changes on the code to obtain my aim. For example I saw that in the gst_tividenc1_codec_start of the file gsttividenc1.c is used VIDENC1_DynamicParams_DEFAULT that stays under Venc1 and where I can change some values as the intraFrameInterval. I think that acting in this way and building I obtain one of my aim. But in order to enable svhmode=1, because I don't find nothing about default parameters for IMP4VENC params? And if I would like to add manually VOS and VOSS to ES packets cretated frot the encoder in order to be able to decode immediately a stream using any type of decoder? Please give me right suggestions. I repeat my aim is that to have a customize version of videnc1 gst element settings parameters that I think are useful for my application.

    Regards,

    G.