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

[Gisbert Haas]

Hi Mike,


can you post the full output please.

I had the similar issues and curious if your output looks similar to mine.

Btw, in your command line you miss the audio input.


Gis.


On 2/13/21 1:23 AM, Mike Soultanian wrote:
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> Hey Everyone,
>
> I'm trying to stream from my GoPro into a USB capture device through my
> Raspberry Pi 4 and send the feed up to Twitch or my rtmp server. After
> a lot of head banging I realized that there were two things that were
> messing me up: 1) specifying an audio input seems to break things and 2)
> trying to use the h264_v4l2m2m hardware encoder also seems to mess
> things up.   After finding the ffmpeg streaming wiki here:
>
> https://trac.ffmpeg.org/wiki/EncodingForStreamingSites
>
> I was finally able to cobble this command-line together and get it
> working... kinda:
>
> *ffmpeg -f v4l2 -video_size 1280x720 -framerate 30 -i /dev/video0 -c:v
> libx264 -preset veryfast -b:v 1984k -maxrate 1984k -bufsize 3968k -vf
> "format=yuv420p" -g 60 -c:a aac -b:a 128k -ar 44100 -f flv
> rtmp://sfo.contribute.live-video.net/app/[my key]*
>
> I say kinda because I can't seem to get audio working.  Now, I just want
> to say that using the QT v4l2 test utility I'm able to get audio and
> video simultaneously, so I know that the capture feed from my GoPro is
> healthy, and using ffmpeg I'm able to record either video from
> */dev/video0* or audio from *plughw:2,0*, but it seems like whenever I
> add *-f alsa -i plughw:2,0* in addition to *-i /dev/video0*, it won't
> stream anything (or record anything during my recording attempts).
>
> Am I missing something obvious here?  I was hoping that I'm just doing
> something stupid, but even looking on that wiki listed above it looks
> like all I need to do is add *-f alsa -ac 2 -i plughw:2,0* and it should
> work, but it just seems to kill the stream or record nothing.
>
> Also, I'd love to be able to use the hardware encoder, so any thoughts
> on that would be appreciated, but getting both audio and video is the
> main priority.
>
> Btw, if you're curious about what I'm doing, I'm trying to build a DIY
> mobile streaming rig that I can take hangliding/paragliding with me so
> people can watch.  I thought it would be a fun project but this portion
> has turned out to be quite challenging!!
>
> Thanks!
>
> Mike
>
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