[FFmpeg-user] Trying to stream to rtmp from my rsp4 and a GoPro

[Mike Soultanian]

On 2/14/2021 8:57 AM, Carl Eugen Hoyos wrote:
> Am So., 14. Feb. 2021 um 17:53 Uhr schrieb Mike Soultanian
> <mike at soultanian.com>:
>> On 2/14/2021 3:27 AM, Carl Eugen Hoyos wrote:
>>> Please provide this command line including complete, uncut console
>>> output to allow us understanding what's going on:
>>> $ ffmpeg -ts abs -i /dev/video0 -f alsa -ac 2 -i hw:CARD=capture,DEV=0
> Any difference if you use mono2abs instead of abs? 


Unfortunately no - same results.  So as sanity check, and I'm annoyed 
(and I apologize) that I didn't try this sooner (I blame it on 
ffmpg/audio/video brain overload), I plugged in my Logitech c920 webcam 
and ran similar commands and it was able to record audio and video, so 
I'm guessing that there is an issue with this capture card (that's my 
best guess).  Last night I ordered an Elgato Camlink 4k as I saw an 
article that used that capture card (and they specifically say it needs 
to be UVC/UAC-compatible) and it should be here this evening.  Lemme 
give that whirl and see if it produces better results.  I was hoping not 
to purchase yet another capture card, but that camlink is pretty 
well-respected and I'm sure I'll get use out of it for other stuff as well.

Should ffmpeg be able to capture from any capture card, or are there 
hardware limitations that would cause these kinds of issues to the point 
where you just say it's not even possible with that particular device, 
or have you tried to make ffmpeg robust enough to handle anything?  The 
capture device is a generic "ezcap" chipset that's rebranded for 
different manufacturers that I found on Amazon - they don't even have 
the specific item listed that I purchased any more...

Thanks!

Mike