'Re: [theora] encoding image from a webcam'

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List:       theora
Subject:    Re: [theora] encoding image from a webcam
From:       Mircea Gliga <mgliga () integrasoft ! ro>
Date:       2009-11-26 19:02:15
Message-ID: 4B0ED0B7.50205 () integrasoft ! ro
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I've created a test class with an encoder and decoder. I'm creating the 
theora headers and immediately
add them to the decoder. For the first 2 packets th_decode_headerin 
returns positive nr,
at the 3rd packet returns TH_EBADHEADER.
Am I aloud to do that? I'm not using ogg_stream_packetin. I just want to 
encode a picture, resulting an
ogg_packet, then decode it on the client side...

    ogg_packet    op;
    th_enc_ctx    *td;
    th_comment    tc,tc1;
    th_info        theoraInfo,theoraInfo1;
    th_setup_info    *ts1;
for(;;)
    {
        int ret = th_encode_flushheader(td,&tc,&op);

       int ret2 = th_decode_headerin(&theoraInfo1,&tc1,&ts1,&op);
        if(0==ret)  break;
    }

What am i doing wrong here ?

Mircea Gliga

Mircea Gliga wrote:
>
>
> Mircea Gliga
>   
>
>
> Ralph Giles wrote:
>> 2009/11/25 Mircea Gliga <mgliga@integrasoft.ro>:
>>
>>   
>>> [...] Then I allocate a th_enc_ctx handle and repeatedly call
>>> th_encode_flushheader().
>>> Do I have to save this header packets? Do i have to provide this header
>>> packets to the decoder when I
>>> initialize it? Because the documentation says Parse the header packets by
>>> repeatedly calling
>>> th_decode_headerin().
>>>     
>>
>> Yes, you have to pass the headers into the decoder to configure it to
>> correctly parse the data packets.
>>
>>  -r
>>
>>   

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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I've created a test class with an encoder and decoder. I'm creating the
theora headers and immediately<br>
add them to the decoder. For the first 2 packets th_decode_headerin
returns positive nr,<br>
at the 3rd packet returns TH_EBADHEADER. <br>
Am I aloud to do that? I'm not using ogg_stream_packetin. I just want
to encode a picture, resulting an <br>
ogg_packet, then decode it on the client side...<br>
<br>
    ogg_packet    op;<br>
    th_enc_ctx    *td;<br>
    th_comment    tc,tc1;<br>
    th_info        theoraInfo,theoraInfo1;<br>
    th_setup_info    *ts1;<br>
for(;;)<br>
    {<br>
        int ret = th_encode_flushheader(td,&amp;tc,&amp;op);<br>
       <br>
       int ret2 =
th_decode_headerin(&amp;theoraInfo1,&amp;tc1,&amp;ts1,&amp;op);<br>
        if(0==ret)  break;<br>
    }<br>
<br>
What am i doing wrong here ?
<pre class="moz-signature" cols="72">Mircea Gliga
</pre>
<br>
<br>
Mircea Gliga wrote:
<blockquote cite="mid:4B0E4BC6.30900@integrasoft.ro" type="cite">
  <meta content="text/html;charset=UTF-8" http-equiv="Content-Type">
  <title></title>
  <br>
  <br>
  <pre class="moz-signature" cols="72">Mircea Gliga
  </pre>
  <br>
  <br>
Ralph Giles wrote:
  <blockquote
 cite="mid:9ec9eb9e0911251430i483ca64va9180be4bbe3318d@mail.gmail.com"
 type="cite">
    <pre wrap="">2009/11/25 Mircea Gliga <a moz-do-not-send="true"
 class="moz-txt-link-rfc2396E" href="mailto:mgliga@integrasoft.ro">&lt;mgliga@integrasoft.ro&gt;</a>:

  </pre>
    <blockquote type="cite">
      <pre wrap="">[...] Then I allocate a th_enc_ctx handle and repeatedly call
th_encode_flushheader().
Do I have to save this header packets? Do i have to provide this header
packets to the decoder when I
initialize it? Because the documentation says Parse the header packets by
repeatedly calling
th_decode_headerin().
    </pre>
    </blockquote>
    <pre wrap=""><!---->
Yes, you have to pass the headers into the decoder to configure it to
correctly parse the data packets.

 -r

  </pre>
  </blockquote>
</blockquote>
</body>
</html>

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