[FFmpeg-user] directly view transcoding in video player

[James Darnley]

On 07/08/2020, Timothy W. Grove <tim_grove at sil.org> wrote:
> I develop an application which displays a video, amongst other things. A
> user may open just about any video format to view in the video display.
> "Saving" a video will invoke ffmpeg to resize and transcode the video to
> h264 (mp4) and display this video.
>
> Is it possible to open the initial video file and stream it to the
> display in its final format using ffmpeg so a user could see the video
> in its final form without the intermediate "saving" step? Thanks for any
> suggestions.

You mean: decode -> encode -> decode -> display?  No ffmpeg cannot do
that.  You may use the libraries to do it yourself.