GES-Selecting Audio Stream

[Chris Wine]

Sure, I will work on that, thank you. What is the best way to submit the
related video file, if that turns out to be important?

On Thu, Dec 3, 2020 at 1:28 PM Thibault Saunier <tsaunier at gnome.org> wrote:

> Hi,
>
> I do not see what is wrong. Could you open an issue with a minimal test
> case I could use to reproduce?
>
> Thanks,
>
>
>
> On Thu, Dec 3, 2020 at 4:39 PM Chris Wine <chriswine at gmail.com> wrote:
>
>> Here is my select-tracks-for-object handler:
>> https://pastebin.com/jTW1ZCgF
>>
>> The main idea is that I know the integer index of the audio stream I want
>> (clip_data->target_stream), so I loop through the audio streams to find the
>> stream_id based on the index. Once I know that stream_id, the timeline's
>> track will only be returned if the stream_id of the track element matches.
>>
>> --Chris
>>
>> On Thu, Dec 3, 2020 at 11:32 AM Chris Wine <chriswine at gmail.com> wrote:
>>
>>> Hi Thibault,
>>>
>>> I am using 1.18.1 on Windows, the x64 mingw version. That code does look
>>> like it should be doing the correct thing; however all the audio pads on
>>> the uridecodebin are still being created in my case. Here's a piece of the
>>> graph that shows the uridecode bin in the GESAudioURISource connecting to
>>> the volume adjustment bin: https://imgur.com/a/JpBDBV9
>>>
>>> --Chris
>>>
>>> On Thu, Dec 3, 2020 at 10:20 AM Thibault Saunier <tsaunier at gnome.org>
>>> wrote:
>>>
>>>> Hello,
>>>>
>>>> What you are doing is correct, and it used to be broken but should work
>>>> just fine in 1.18 thanks to:
>>>>
>>>>
>>>> https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/commit/09cc8dde0036420932704631f59531a1d84de018
>>>>
>>>> What version of GStreamer are you using?
>>>>
>>>> Regards,
>>>>
>>>> - Thibault
>>>>
>>>>
>>>> On Wed, Dec 2, 2020 at 9:40 PM Chris Wine <chriswine at gmail.com> wrote:
>>>>
>>>>> Hi, I'm having a problem with selecting the correct audio stream from
>>>>> an input file that I'm using with GES. The input file has 1 video stream
>>>>> and 4 identical (as far as the CAPS are concerned) audio streams. I am
>>>>> currently using GStreamer/GES mingw x64 1.18.1 on the Windows platform.
>>>>>
>>>>> As the documentation suggested, I wrote a signal handler for the
>>>>> GESTimeline's "select-tracks-for-object" signal, and I've verified that it
>>>>> is working as expected with returning a NULL for GESTrackElements that are
>>>>> not the audio stream I want, while returning a GPtrArray with the
>>>>> timeline's audio track when it is the audio stream I want.
>>>>>
>>>>> The problem though is that only the 1st audio stream of the input file
>>>>> is ever chosen for the output. I've been looking through the GES source
>>>>> code, and it appears that when ges_source_create_topbin in GESSource
>>>>> is called for the audio, it will always just look for the first pad created
>>>>> when the "pad-added" signal is on uridecodebin is called; this made me
>>>>> wonder if something in the creation of uridecodebin itself was supposed to
>>>>> be responsible for selecting the correct audio stream. However, the only
>>>>> thing I can find there is the "caps" property which does restrict the
>>>>> streams, but since my 4 audio streams all have identical CAPS, this doesn't
>>>>> end up being a restriction.
>>>>>
>>>>> My question is first, am I missing something obvious that would make
>>>>> this work as expected? If not, aside from code changes to
>>>>> GESSource/UriSource/AudioUriSource, is there something tricky I can do like
>>>>> finding the uridecodebin, intercepting the pad-added signal before it gets
>>>>> to the GESSource, and only letting it through when getting to the pad that
>>>>> I want to be connected?
>>>>>
>>>>> Thank you, responses are much appreciated.
>>>>> --Chris
>>>>> _______________________________________________
>>>>> gstreamer-devel mailing list
>>>>> gstreamer-devel at lists.freedesktop.org
>>>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>>
>>>>
>>>>
>>>> --
>>>> Thibault Saunier, Igalia - www.igalia.com <http://www.centricular.com>
>>>> _______________________________________________
>>>> gstreamer-devel mailing list
>>>> gstreamer-devel at lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
>>> _______________________________________________
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>>
>
>
> --
> Thibault Saunier, Igalia - www.igalia.com <http://www.centricular.com>
> _______________________________________________
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> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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