[FFmpeg-devel] Fwd: Transcode VP8 RTP stream to mpeg1 video frames.

[Ronald S. Bultje]

Hi,

On Wed, May 20, 2015 at 7:15 AM, Ajay Choudary <ajay6ft at gmail.com> wrote:

> Hi Ronald,
>
> Thank you for your quick response, i was new to ffmeg mailing lists.
> I tried with sdp_file option as shown in below command,
> # ffmpeg -vcodec vp8 -sdp_file file.sdp -i rtp://192.168.1.93:15000  -f
> mpeg1video -b: 400k -r 30  http://192.168.1.11:8082/url/640/480/
> ffmpeg version n2.5.6-3-ga2ad7fd Copyright (c) 2000-2015 the FFmpeg
> developers
>   built on May  1 2015 13:18:01 with gcc 4.4.7 (GCC) 20120313 (Red Hat
> 4.4.7-11)
>   configuration: --enable-nonfree --enable-gpl --enable-libvpx
> --enable-decoder=aac --enable-libx264 --enable-demuxer=mov --enable-x11grab
> --enable-zlib --enable-protocol=http --enable-filter=aformat
> --enable-filter=volume --enable-filter=aresample --prefix=/usr/
> --libdir=/usr/lib64/
>   libavutil      54. 15.100 / 54. 15.100
>   libavcodec     56. 13.100 / 56. 13.100
>   libavformat    56. 15.102 / 56. 15.102
>   libavdevice    56.  3.100 / 56.  3.100
>   libavfilter     5.  2.103 /  5.  2.103
>   libswscale      3.  1.101 /  3.  1.101
>   libswresample   1.  1.100 /  1.  1.100
>   libpostproc    53.  3.100 / 53.  3.100
> *Unrecognized option 'sdp_file'.*
> Error splitting the argument list: Option not found.
>
> i searched ffmpeg source code, no where they are processing -sdp_file
> option.


I think you open the sdp file (-i file.sdp, perhaps also use -f sdp to
force sdp if it doesn't figure that out automatically). The sdp is then
assumed to describe the rtp stream.

Ronald