On 13/12/13 19:49, Jeremy Hansen wrote: > > On Dec 13, 2013, at 5:25 AM, Luca Barbato <[email protected]> wrote: > >> On 12/12/13 05:10, Jeremy Hansen wrote: >>> >>> >>> On Dec 11, 2013, at 5:32 AM, Luca Barbato <[email protected]> wrote: >>> >>>> On 11/12/13 03:41, Jeremy Hansen wrote: >>>>> >>>>> Right now I’m using avconv to capture video from a BlackMagic Design Mini >>>>> Recorder PCIe card. This is working great. My next step is to trying to >>>>> stream live to a rtmp server (Using nginx and the rtmp module). >>>>> >>>>> Here’s my current command line: >>>>> >>>>> bmdcapture -C 0 -m 14 -V 3 -A 2 -F nut -f pipe:1 | \ >>>>> avconv -y -i - -c:v libx264 -c:a aac -ar 44100 -strict experimental -s >>>>> 640x360 -b:a 160k /pub/video/"$SHOW"_$TIME.mp4 >>>>> >>>>> What would I have to do to stream to rtmp as well? >>>>> >>>> >>>> Have a rtmp server somewhere (crtmpd is my current favourite) and >>>> replace /pub/video/"$SHOW"_$TIME.mp4 with rtmp://serverhost/app/path/ >>> >>> Understood, but I’m trying to write to both a file and a stream >>> simultaneously. >>> >>> I have this working…meaning, it starts, but rapidly fails after a few >>> moments. Here’s my current command line: >>> >>> bmdcapture -C 0 -m 14 -V 3 -A 2 -F nut -f pipe:1 | avconv -y -i - -copytb >>> -c:v libx264 -c:a aac -ar 44100 -strict experimental -s 640x360 -b:a 160k >>> /pub/video/"$SHOW"_$TIME.mp4 -f flv -c:v libx264 -c:a aac -ar 22050 >>> -strict experimental -s 384x216 -b:a 64k rtmp://live.mysite.com/myapp/video >>> >>> But it fails after some moments with this error: >>> >>> Stopping Capture 22 q=28.0 q=31.0 size= 5138kB time=62.48 bitrate= >>> 673.6kbits/s >>> Failed to update header with correct duration.0kB time=62.96 bitrate= >>> 672.7kbits/s >>> [flv @ 0x248b7c0] Failed to update header with correct file size. >>> >>> Any clues as to what this is? >> >> Your system is too probably slow, add -preset ultrafast so x264 won’t >> tax it too much. > > Thanks. Do I add this to the first x264 for the file or for the rtmp stream > or both? >
Start with both then crank up the preset till it can be sustained. lu _______________________________________________ libav-tools mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-tools
