[FFmpeg-devel] Add support for j2ki/mxf

[tim nicholson]

On 23/07/15 11:32, Matthieu Bouron wrote:
> On Thu, Jul 23, 2015 at 11:04 AM, tim nicholson <
> nichot20-at-yahoo.com at ffmpeg.org> wrote:
> 
>> On 22/07/15 14:29, Matthieu Bouron wrote:
>>> Hello there,
>>>
>>> The following patchset add support for j2ki/mxf files (which store frames
>>> using the separate fields / segmented frame layouts, ie: fields are
>>> stored in seperate frames) through the insertion of filters at the
>>> ffmpeg/ffplay level. It differs from my original attempt which introduced
>>> modifications at the decoder level, which in my opinion was wrong and
>>> introduced several limitations, such as:
>>>
>>> [..]
>>
>> I may be missing something here, as my mind has been on other things.
>> But currently most mxf material I see that ffmpeg correctly handles is
>> "frame wrapped" with the frame layout as type 1 (SEPARATE_FIELDS).
>>
> 
> Can you provide samples with this layout ? I might have misinterpreted the
> MXF
> specs on this one. My understating is that, separated fields (as well as
> segmented frame) means
> that the fields are stored in a different "packet" (that might no be the
> right world for it).
> 
> Also it might be specific to jpeg2000 (see below), i'll have to look again
> at the mxf/jpeg2000 spec again.
> 

I have added a 4 frame example to the trac ticket of interlaced IMX50
material.

according to mxf2raw (from bmxlib) this file is flagged SEPARATE_FIELDS.

> [..]


-- 
Tim.
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