[FFmpeg-user] Fault-tolerant multicast UDP streaming
stephen at axes-techsa.co.za
Wed Jan 14 06:39:35 CET 2015
I've had success looking at the issue in a different way
Use fmpeg to save to disk as ffserver to setup a listening connection. So ffserver will serve what fmpeg is saving
If your client connection goes down you fmpeg process is not affected as udp stream from fmpeg is not stopped
E-mail stephen at axes-techsa.co.za
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> On 13 Jan 2015, at 01:52, Sam Gardner <samgardner90 at gmail.com> wrote:
> I am using ffmpeg to capture an input video feed from a capture device,
> save to disk, and relay the feed via udp to a host machine. When the
> network is down, i.e. an unplugged cable, or faulty switch, or the host is
> down, ffmpeg crashes with:
> "[mpeg1video @ 0x2fdcb20] ignoring invalid SAR: 0/0 Last message repeated
> 38 times av_interleaved_write_frame(): Network is unreachable frame= 758
> fps= 25 q=1.0 size= 616kB time=00:00:30.24 bitrate= 166.7kbits/sframe= 758
> fps= 25 q=1.0 Lsize= 616kB time=00:00:30.24 bitrate= 166.7kbits/s
> video:616kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: 0.000000% Conversion failed!"
> When the network crashes, this also crashes the saving to disk.
> Unfortunately my capture device cannot handle multiple simultaneous access
> so I can't split this into two processes (easily).
> I would like to make the UDP streaming fault tolerant to continue trying to
> stream the next frame if it can't send any packets - the process should not
> exit. Surely this has happened to other ffmpeg users who are using headless
> media servers? I don't want to use a daemon to restart the process as this
> will cause more headaches dealing with the frames saved to disk - they
> would be split to separate files on every frame! I have tried the tee muxer
> but I can't make the child processes continue if one of them fails.
> Is there a flag I can set to continue/ignore the "Network is unreachable"
> exception thrown?
> I'd like to do this without making a custom build of ffmpeg, but if anyone
> has tried this before I would appreciate any pointers.
> Sam Gardner
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
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