[mythtv] Mediacodec playback of mpeg2 on fire stick 4k

[Mark Kendall]

Aman

On a slightly different note - can you tell me whether there is a way
to detect in advance what codecs any given MediaCodec implementation
actually supports?

I like to do as many up front checks as possible - and MediaCodec is
currently a bit of a black hole. Our code does fallback to software
decoding but it is not very clean (as we have to wait for decoding to
fail) and we lose a few frames as a result.

Thanks and regards
Mark

On Wed, 11 Dec 2019 at 15:39, Peter Bennett <pb.mythtv at gmail.com> wrote:
>
>
>
> On 12/9/19 9:22 PM, Aman Gupta wrote:
>
>
>
> On Mon, Dec 9, 2019 at 2:35 PM Peter Bennett <pb.mythtv at gmail.com> wrote:
>>
>> Hi Aman
>>
>> There is still the ongoing issue with decoding mpeg2 using mediacodec
>> through ffmpeg. The process hangs, and never gets any frames back.
>
>
> I have not experienced any such issue. You're not receiving even a single frame back?
>
> No frame is seen. This is only with fire stick 4k. It works fine on Nvidia Shield.
>
> Are you creating the decoder with a Surface or not?
>
> This is not using a surface, just decoding with ffmpeg into memory and rendering after that with OpenGL. Mark Kendall is working on direct rendering. I do not know if the same problem will happen there, as the direct rendering is not currently in a working state.
>>
>>
>>
>> As a separate project i have developed a pure android mythtv frontend
>> player, using java and the exoplayer library. It is working well and I
>> am surprised to find that it plays mpeg2 perfectly and also deinterlaces
>> it. Exoplayer uses pure mediacodec, there is no software video decoding.
>>
>> Whatever the problem is with mediacodec and fire stick 4K, evidently
>> there must be a way around it.
>>
>> If you need any more information please contact me.
>>
>> Regards
>> Peter
>
>
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