Dynamic Pipelines: Unable to read video file

[Dimitrios Katsaros]

Are you running the dynamic pipeline in your own app? when you change the
pipeline layout you need to do a latency renegotiation to correct any added
delay that an extended branch may add. Look at this for an idea on how to
do it correctly:

https://github.com/GStreamer/gstreamer/blob/master/tools/gst-launch.c#L746


Doing the recalculation after the latency query is generally important to
ensure that the pipeline has been configured correctly and a new latency
calculation is possible. Make sure you are receiving the message on the bus!

If you are doing this at runtime it will cause a hickup in the stream for
the new latency to take effect. If you want to avoid this you should
instead manually increase the latency my enough so that after adding
elements the pipeline will still have enough time to process the incoming
data.

Dimitrios

On Thu, Feb 9, 2017 at 1:28 PM, ltramart <ludovic.tramart at acteongroup.com>
wrote:

> Hi everyone,
>
> I have some trouble with dynamic pipeline. I have so far been unsuccessfull
> to resolve it.
>
> I am using an imx6 solution with gstreamer 0.10.
>
> I have a main live pipeline used to catch snapshot of video then 3 bin: the
> first one is just to encode the video in h264, the 2nd one to stream it
> using udpsink, the 3rd one to save it on a usb device using filesink. Bin2
> and Bin3 need Bin 1. Bin 1 is created whenever Bin 2 or/and 3 is/are
> needed.
>
> When i record a video using Bin1 and 3 it works fine.
> When i stream a video using Bin1 and 2 it works fine.
> When i record a video using Bin1 and 3, then activate stream using Bin2 it
> works fine.
> When i stream a video using Bin1 and 2, then activate video rec using Bin3,
> stream still works fine but the recorded video is uncorrect. I get a
> correctly formated avi file with just *black screen*...
>
> The only way I have succeeded to make it works was to set my pipeline to
> RESET_STATE prior to attach my Rec Bin 3 then back to PLAYING_STATE but
> then
> my stream gets interrupted for few secs...
>
> Attached is the structure of my pipeline.
>
> I am open to any suggestion...
>
> Thanks for your help
>
> <http://gstreamer-devel.966125.n4.nabble.com/file/
> n4681780/09Feb2017105830.png>
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.
> n4.nabble.com/Dynamic-Pipelines-Unable-to-read-video-file-tp4681780.html
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