From: Andriy Gelman <andriy.gelman@gmail.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Cc: Cameron Gutman <aicommander@gmail.com>
Subject: Re: [FFmpeg-devel] [PATCH] avcodec/v4l2_m2m_dec: dequeue frame if input isn't ready
Date: Mon, 27 Dec 2021 01:17:38 -0500
Message-ID: <20211227061738.mbkxlmm4deveyggf@jackie> (raw)
In-Reply-To: <20211214021215.456493-1-aicommander@gmail.com>
On Tue, 14. Dec 02:12, Cameron Gutman wrote:
> The V4L2M2M API operates asynchronously, so multiple packets can
> be enqueued before getting a batch of frames back. Since it was
> only possible to receive a frame by submitting another packet,
> there wasn't a way to drain those excess output frames from when
> avcodec_receive_frame() returned AVERROR(EAGAIN).
>
> In my testing, this change reduced decode latency of a real-time
> 60 FPS H.264 stream by approximately 10x (200ms -> 20ms) on a
> Raspberry Pi 4.
I was doing some more tests today, but didn't have any luck dequeuing a frame
if ff_decode_get_packet() returned EAGAIN.
Could you share the dataset?
Thanks,
--
Andriy
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next prev parent reply other threads:[~2021-12-27 6:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20211214021215.456493-1-aicommander@gmail.com>
2021-12-25 7:28 ` Andriy Gelman
2021-12-27 6:17 ` Andriy Gelman [this message]
2021-12-27 9:18 ` Cameron Gutman
2021-12-28 23:41 ` Andriy Gelman
2022-01-02 16:56 ` Andriy Gelman
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