ges-launch tutorial

[Thibault Saunier]

Hi Vince,

This is indeed an error in the documentation, we need to specify the
duration if we specify the inpoint right now, we could handle that in a
better way in ges-launch but for now, could you make a patch to update the
documentation?

BR,

- Thibault

On Sun, Dec 29, 2019 at 11:31 AM Vincent Achard <vincent.achard at gmail.com>
wrote:

> Hello
>
> The actual https://gstreamer.freedesktop.org ges-launch tutorial says:
>
> "ges-launch-1.0 +clip /path/to/media inpoint=4.0
>
> Assuming "media" is a 10 second long media sample, this will play the
> sample from the 4th second to the 10th, resulting in a 6-seconds long
> playback."
>
> However, my experience is:
>
> ges-launch-1.0 +clip file.ogg inpoint=2
> >>>fails with error: ERROR: Could not create timeline because: Couldn't
> add clip with id file:///path/to/file.ogg to layer with priority -1
>
> ges-launch-1.0 +clip file.ogg inpoint=2 duration=2
> >>>succeeds (I see the preview with correct cut)
>
>
> file.ogg contains one video/x-theora stream and is 0:00:24.024000000 long
>
>
> looking through the debug log I find in the case that fails :
>
> 0:00:00.140059961  3054      0x111ce30 INFO                 gestree
> ges-timeline-tree.c:403:check_track_elements_overlaps_and_values:
> videourisource0<0x12ea190> [ 0:00:00.000000000 (0:00:02.000000000) -
> 0:00:24.024000000(0:00:24.024000000) layer: 0]  inpoint + duration
> 26024000000 > max_duration 24024000000
>
>
> my guess is that the default duration is the total length, therefore an
> inpoint > 0 will result in failure
>
> indeed:
> ges-launch-1.0 +clip file.ogg inpoint=0
> >>>succeeds
>
> I am using a self compiled 1.16.0 gstreamer version
>
> am I missing something?
>
> or should the tutorial be modified, as this is misleading (and it's one of
> the first examples: newcomers could want to run away?)
>
> please apologize for my bad english, and if this is not the right place to
> post
>
> cheers!
>
> Vince
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>
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