omxvideoenc: Failed to force a keyframe: Unsupported index (0x8000101a)

[Sebastian Dröge]

On Sa, 2015-08-15 at 13:56 +0200, Graham Leggett wrote:
> On 15 Aug 2015, at 1:04 PM, Sebastian Dröge <
> sebastian at centricular.com> wrote:
> 
> > It means that the RPi OpenMAX implementation does not support 
> > forcing a
> > keyframe to be generated with that API, or we use that API wrong.
> 
> Using the patch below to improve the error message, I am now getting 
> the following:
> 
> 0:03:01.909221579 10369  0x1a526f0 ERROR            omxvideoenc 
> gstomxvideoenc.c:1553:gst_omx_video_enc_handle_frame:<omxh264enc
> -omxh264enc0> Failed to force a keyframe at index 200: Unsupported 
> index (0x8000101a)
> 
> Does anyone know what units an “index” is measured in? Is it a frame 
> number, seconds, something else?
> 
> Is “200” a reasonable index?

That's the index of the port as defined by the RPi openmax component.
It's how the port is identified.

> Patching further to print an error if the attempt to force a keyframe 
> ever succeeds shows that this call never succeeds. Is this API 
> documented anywhere?

Yes, it's documented in the OpenMAX IL specification.
https://www.khronos.org/registry/omxil/specs/OpenMAX_IL_1_1_2_Specifica
tion.pdf

-- 
Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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