Raspberry Pi camera only works with mjpeg not h264

[JustinS-B]

Raspberry Pi 5 with freshly installed & fully updated full version of the Raspberry Pi OS 64bit desktop and a Raspberry Pi Camera 3 using 64bit go2rtc downloaded binary. Following the examples in the go2rtc documentation here, I have edited go2rtc.yaml to include the following lines.

streams:
  picam_h264: exec:libcamera-vid -t 0 --codec h264 -o -
  picam_mjpeg: exec:libcamera-vid -t 0 --codec mjpeg -o -

go2rtc starts normally from CLI and if I use the WebUI on port 1984, I can click on the picam_mjpeg stream link and streams to the webpage, exactly as expected.

justin@Pi5:$  ./go2rtc_linux_arm64 
11:27:35.601 INF go2rtc version 1.8.5 linux/arm64
11:27:35.602 INF [api] listen addr=:1984
11:27:35.602 INF [rtsp] listen addr=:8554
11:27:35.602 INF [webrtc] listen addr=:8555

However, if I click on the picam_h264 stream link, the web page is blank grey only displaying the text mse: streams: EOF

The CLI gives the following error:

11:32:31.187 ERR github.com/AlexxIT/go2rtc/internal/mjpeg/init.go:166 > error="streams: EOF"

If I click on the stream.html link, I get a grey video page with the following text:

webrtc/offer: streams: codecs not matched: JPEG => VP8, RTX, VP9, H264, ULPFEC, RED, OPUS, G722, PCMU, PCMA, TELEPHONE-EVENT, S16B, S16L
error

FIXED
However, if I edit go2rtc.yaml to add the switch --libav-format h264 to the picam_h264 stream entry, as below, everything seems to work exactly as it should.

streams:
  picam_h264: exec:libcamera-vid -t 0 --libav-format h264 -o -
  picam_mjpeg: exec:libcamera-vid -t 0 --codec mjpeg -o -

[AlexxIT]

Probably libcamera developers have changed default params

[marcob79]

Probably it is something related to pi5 in particoluar

[AlexxIT]

#881

[AlexxIT]

https://github.com/AlexxIT/go2rtc/releases/tag/v1.9.2

[marcob79]

@JustinS-B how about performance of picamera in h264 mode on pi5 ?
if the stream running smooth even with at least FHD resolution?