[FFmpeg-devel] [PATCH 5/7] CrystalHD: Bring in h.264 parser to establish picture type.

[Philip Langdale]

 On Sun, 27 Mar 2011 10:43:40 +0200, Michael Niedermayer 
 <michaelni at gmx.at> wrote:
> On Sun, Mar 27, 2011 at 07:22:45AM +0200, Reimar Döffinger wrote:
>>
>>
>> On 26 Mar 2011, at 18:50, Philip Langdale <philipl at overt.org> wrote:
>>
>> > As the hardware is unreliable, we will have to use the h.264 
>> parser
>> > to identify whether an input picture is a field or a frame. This
>> > change loads the parser and extracts the picture type.
>>
>> I think there is a way to tell the parser not to do any parsing (in 
>> particular, not search for start codes) but only parse. 
>> Libavcodec/avidec.c uses it like that.
>
> see AVSTREAM_PARSE_HEADERS and PARSER_FLAG_COMPLETE_FRAMES

 But I don't see how this would work. The decoding of the picture
 structure is done by parse_nal_units() in the 
 !PARSER_FLAG_COMPLETE_FRAMES
 path.

 --phil