Title : RTSP/RTP stream from anjvision ipcameraĭuration: N/A, start: 0.083000, bitrate: N/A attempted to set receive buffer to size 393216 but it only ended up set as 327680 What am I doing wrong? How can I get ffmpeg to work with the hardware decoder?Įxample output of ffmpeg (generating snapshots of a video stream) ffmpeg -c:v h264_mmal -i 'rtsp://192.168.1.87/stream0:554?username=admin&password=admin' -vf fps=1/60 img%03d.jpgįfmpeg version git-56df829 Copyright (c) 2000-2020 the FFmpeg developersĬonfiguration: -arch=armel -target-os=linux -enable-gpl -enable-omx -enable-omx-rpi -enable-nonfree -enable-mmal However, omxplayer does successfully play the video and seems to be using hardware-assisted decoding, as the CPU usage is much lower than ffmpeg on software decoder. Example output below.Īlso, if I use ffplay to play the same video, it plays fine using the software decoder (but uses high CPU, due to software decoding), but when I add the -c:v h264_mmal tag to enable hardware decoding, I get nothing (never loads a video window, etc). I have re-compiled ffmpeg from the latest source, using the -enable-mmal flag, but it still only outputs what appear to be blank frames.

However, on the RPi 4, when I include the -c:v h264_mmal directive, it appears to generate blank frames, as if the decoder never outputs any data. I have had good success on the RPi 3 using ffmpeg to decode h.264 streams from various Ethernet video sources.

Ffmpeg decoder