[FFmpeg-user] Drawtext overlay without denuding and decoding

Axes-techsa stephen at axes-techsa.co.za
Thu Jan 1 09:45:26 CET 2015


I am using a Samsung exynos and my plan was to overlay text on live rtsp for an IP camera and sink it to another rtsp server so the h264 feed will have test from a 

Stephen Valentine
Mobile 079-107-3493
E-mail stephen at axes-techsa.co.za


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> On 31 Dec 2014, at 05:16, Yafes Sahin <yafes7-at-yahoo.de at ffmpeg.org> wrote:
> Hi Everybody, 
> i am on a windows machine, attached to it a decklink SDI Card, where i get a uyvy422(TV) signal over dshow. To see where latency happens, i wanted to stream raw without encoding this feed.  I used the command:
> ffmpeg -f dshow -i video="Blackmagic WDM Capture"  -r 25 -codec copy -an -f mpegts udp://
> However is this command supposed to work? with FFPLAY i get "circular buffer" error, mPlay "MPEG: FATAL: EOF while searching for sequence header."
> removing "-f mpegts" ffmpeg complains about wrong output "Unable to find a suitable output format for"
> So what is the right way of streaming raw-input from a camera or any raw-video source.
> Regards
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