[FFmpeg-user] Issues deinterlacing DirectShow input with ffplay

[Roger Pack]

Input frame rate is still the same both ways?

On Fri, Aug 13, 2021 at 10:06 PM Alex via ffmpeg-user
<ffmpeg-user at ffmpeg.org> wrote:
>
> I'm using ffplay as a live preview for my capture card, and I'm trying to use
> the yadif filter in mode 1 (send_field) to deinterlace the 59.94i input to
> 59.94 fps.
>
> Using this command works as expected:
>
>   ffplay -f dshow -i video="SA7160 PCI, Analog 01 Capture" -vf yadif=1
>
> However, if I try the same command with an audio device included, the frame
> rate appears capped at 29.97 fps as if I were using mode 0 (send_frame):
>
>   ffplay -f dshow -i video="SA7160 PCI, Analog 01 Capture":audio="SA7160 PCI,
>   Analog 01 WaveIn" -vf yadif=1
>
> Why does the filter only work properly when there is no audio device on the
> input? Is there a workaround for this or is it a bug?
>
> Here's a screen recording as a demonstration: https://streamable.com/p0v9rk
> Console output is attached.
>
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