I'm trying to provide tools and test scripts to diagnose and reproduce av sync problems in and around
I have a gst pipeline that sends in blip bop and can use my eyes and ears to observe the output, but I would rather have some code to the analysis.
such a thing does exist, but I haven't been able to make it all work smoothly.
create input file:
melt -profile hdv_720_30p blipflash out=90 -consumer avformat:blipflash.ts terminate_on_pause=1
test:
melt avformat:blipflash.ts -consumer blipflash:results.txt terminate_on_pause=1
cat results.txt
0 0.00
30 0.00
60 0.00
90 0.00
Each line is the frame the tone was detected, and how far off the flash is.
does gst have anything like this?
If one of the gst visualizers like spacescope could give me a full white frame on beep, that would get me most of the way there.
This gives me my white frame:
but some of them get lost :(
quoting my MR:
"""I am seeing 46.88fps on a 30 fps stream, so I think many of the white frames are getting lost.
I can make this work by playing with the new audiotestsrc parameters,
but maybe this blipbop generator should be written from scratch as a single plugin that generates both.
"""
Can someone point me at some code that does a/v based on the system clock?
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