GES 1.12.4 and 1.14.2: Problem with slide transitions

Fri Aug 10 12:37:23 UTC 2018

Hello, could you share you project with the assets?

Regards

Thibault

On Fri, Aug 10, 2018, 01:01 David Ing <ding at panopto.com> wrote:

> I forgot to say that the log messages appear at the time of each slide
> transition.
>
> On Thu, Aug 9, 2018 at 9:58 PM, David Ing <ding at panopto.com> wrote:
>
>> I wrote a sample application to demonstrates a problem that I'm having
>> with GES:
>>
>>
>> https://github.com/adaviding/gstreamer-playground/blob/680b203603ffa35e27493e28fe1620edacb8d655/ges-slide-composition/main.cpp
>>
>> The problem is with scenario #2 only, and I observe the problem running
>> on Windows 10 with GES 1.12.4 and 1.14.2.  I have only tried this on
>> Windows.
>>
>> Scenario 1 ( *#define INCLUDE_FOREGROUND_VIDEO false* )
>>
>>    - The sample application builds a video consisting of 5 jpeg images
>>    (i.e. "slides").  Each slide is up for 2 seconds so the movie is 10 seconds
>>    long.  There is no audio in the sample application, and no audio track.
>>
>> Scenario 2 ( *#define INCLUDE_FOREGROUND_VIDEO true* )
>>
>>    - This is just like scenario 1, but there is also a
>>    picture-in-picture style video in the corner of the screen, in front of the
>>    slides.  I am using a video which has no audio track.
>>
>> The problem is that in scenario #2, during the slide transition (which
>> occurs every 2 seconds), the screen goes black for a fraction of a second.
>> Interestingly, the foreground video does not go black ... only the portion
>> of the screen subtended by the slides does this (which is most of the
>> screen).  And this happens for every slide transition.
>>
>> Some other things to note about my application.
>>
>>    - I am using a GESTimeline with a GstPipeline (not GESPipeline)
>>    because I need to encode the composition in many different ways.
>>    Computational efficiency is of paramount importance, which means I only
>>    want to execute the pipeline once.  I cannot achieve this using a
>>    GESPipeline, so I need to use a GstPipeline
>>    - I wired the NleComposition "query-position" signal so that it
>>    fetches the current position of the GstPipeline.
>>
>> Running with *--gst-debug=3*, I observe the following logs under each
>> scenario.
>>
>>    - No highlights = the log appears in both scenarios.
>>    - Yellow highlights = the log only appears in scenario #2.
>>    - Pink highlights = the log appears in both scenarios, but is being
>>    repeated more often.
>>
>>
>> Scenario 1:
>>
>> 0:00:09.110542588 13280 0000016292B0B940 WARN              aggregator
>> gstaggregator.c:1397:gst_aggregator_query_latency_unlocked:<gessmartmixer0-compositor>
>> Latency query failed
>> 0:00:09.110791659 13280 0000016292B0BD00 WARN                 GST_URI
>> gsturi.c:837:gst_file_utils_canonicalise_path: FIXME: canonicalise win32
>> path
>> 0:00:09.113365512 13280 0000016292B0BD00 WARN                 basesrc
>> gstbasesrc.c:3480:gst_base_src_start_complete:<source> pad not activated yet
>> 0:00:09.115511241 13280 0000016292B0BD00 WARN                 basesrc
>> gstbasesrc.c:3480:gst_base_src_start_complete:<source> pad not activated yet
>> 0:00:09.118815897 13280 0000016292D3CD00 FIXME           videodecoder
>> gstvideodecoder.c:928:gst_video_decoder_drain_out:<jpegdec9> Sub-class
>> should implement drain()
>> 0:00:09.120799711 13280 0000016292D3CD00 FIXME           videodecoder
>> gstvideodecoder.c:928:gst_video_decoder_drain_out:<jpegdec9> Sub-class
>> should implement drain()
>> 0:00:09.121881327 13280 0000016292D3CD00 WARN            videodecoder
>> gstvideodecoder.c:2438:gst_video_decoder_chain:<jpegdec9> Received buffer
>> without a new-segment. Assuming timestamps start from 0.
>>
>>
>> Scenario 2:
>>
>> 0:00:09.250672090 16592 000001F366DE7200 WARN              aggregator
>> gstaggregator.c:1397:gst_aggregator_query_latency_unlocked:<gessmartmixer0-compositor>
>> Latency query failed
>> 0:00:09.250841298 16592 000001F366DECE40 WARN                 GST_URI
>> gsturi.c:837:gst_file_utils_canonicalise_path: FIXME: canonicalise win32
>> path
>> 0:00:09.253852393 16592 000001F366DECE40 WARN                 basesrc
>> gstbasesrc.c:3480:gst_base_src_start_complete:<source> pad not activated yet
>> 0:00:09.255128014 16592 000001F366DECE40 WARN                 basesrc
>> gstbasesrc.c:3480:gst_base_src_start_complete:<source> pad not activated yet
>> 0:00:09.256701573 16592 000001F366DECE40 WARN                 GST_URI
>> gsturi.c:837:gst_file_utils_canonicalise_path: FIXME: canonicalise win32
>> path
>> 0:00:09.257970631 16592 000001F366DECAC0 WARN                 qtdemux
>> qtdemux_types.c:228:qtdemux_type_get: unknown QuickTime node type uuid
>> 0:00:09.262471410 16592 000001F366DECAC0 WARN                 qtdemux
>> qtdemux_types.c:228:qtdemux_type_get: unknown QuickTime node type pasp
>> 0:00:09.258281331 16592 000001F366DECE40 WARN                 basesrc
>> gstbasesrc.c:3480:gst_base_src_start_complete:<source> pad not activated yet
>> 0:00:09.263756148 16592 000001F366DECAC0 WARN                 qtdemux
>> qtdemux.c:3017:qtdemux_parse_trex:<qtdemux5> failed to find fragment
>> defaults for stream 1
>> 0:00:09.265397171 16592 000001F366DECE40 WARN                 basesrc
>> gstbasesrc.c:3480:gst_base_src_start_complete:<source> pad not activated yet
>> 0:00:09.266319062 16592 000001F366DECAC0 WARN                 basesrc
>> gstbasesrc.c:2389:gst_base_src_update_length:<source> processing at or past
>> EOS
>> 0:00:09.268796277 16592 000001F366F6A500 FIXME           videodecoder
>> gstvideodecoder.c:928:gst_video_decoder_drain_out:<jpegdec9> Sub-class
>> should implement drain()
>> 0:00:09.273111438 16592 000001F366F6A500 FIXME           videodecoder
>> gstvideodecoder.c:928:gst_video_decoder_drain_out:<jpegdec9> Sub-class
>> should implement drain()
>> 0:00:09.274373567 16592 000001F366F6A500 WARN            videodecoder
>> gstvideodecoder.c:2438:gst_video_decoder_chain:<jpegdec9> Received buffer
>> without a new-segment. Assuming timestamps start from 0.
>> 0:00:09.313360990 16592 000001F366CFBD00 WARN                GST_PADS
>> gstpad.c:4161:gst_pad_peer_query:<queue11:src> could not send sticky events
>> 0:00:09.315771835 16592 000001F366DE7D00 WARN              aggregator
>> gstaggregator.c:1397:gst_aggregator_query_latency_unlocked:<gessmartmixer0-compositor>
>> Latency query failed
>>
>>
>> Does anybody know how I might fix the problem with scenario #2?
>>
>
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