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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