[FFmpeg-user] 答复: Can someone point me to a libavformat file

[Robert Clove]

Meng,

Thanks for the detailed reply.
I have one more question for you, i have dump of decrypted rtp(video)
packets, i want to generate the .h264 from that.
I know we cannot directly give the file to ffmpeg, any idea on what all
needs to be done for the same ?

Regards


On Fri, Jun 1, 2018 at 2:05 PM, 刘 猛 <meng.work at outlook.com> wrote:

>
> run : ffmpeg -i flame.avi  ,then the output is:
>
> ffmpeg version 2.8.14-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg
> developers
>   built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
>   configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1
> --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl
> --enable-shared --disable-stripping --disable-decoder=libopenjpeg
> --disable-decoder=libschroedinger --enable-avresample --enable-avisynth
> --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray
> --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame
> --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp
> --enable-libschroedinger --enable-libshine --enable-libsnappy
> --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora
> --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack
> --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi
> --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394
> --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264
> --enable-libopencv
>   libavutil      54. 31.100 / 54. 31.100
>   libavcodec     56. 60.100 / 56. 60.100
>   libavformat    56. 40.101 / 56. 40.101
>   libavdevice    56.  4.100 / 56.  4.100
>   libavfilter     5. 40.101 /  5. 40.101
>   libavresample   2.  1.  0 /  2.  1.  0
>   libswscale      3.  1.101 /  3.  1.101
>   libswresample   1.  2.101 /  1.  2.101
>   libpostproc    53.  3.100 / 53.  3.100
> Input #0, avi, from 'flame.avi':
>   Duration: 00:00:03.14, start: 0.000000, bitrate: 736 kb/s
>     Stream #0:0: Video: indeo4 (IV41 / 0x31345649), yuv410p, 256x240, 731
> kb/s, 35 fps, 35 tbr, 35 tbn, 35 tbc
>
> From the output, we can konw that the codec of video in flame.avi is not
> h264. So, you can not use  -vcodec copy .
>
> try this:
> ffmpeg -i flame.avi -c:v libx264 -f h264 stream1.h264
>
>
> ________________________________
> 发件人: ffmpeg-user <ffmpeg-user-bounces at ffmpeg.org> 代表 Robert Clove <
> cloverobert at gmail.com>
> 发送时间: 2018年6月1日 1:11
> 收件人: FFmpeg user questions
> 主题: Re: [FFmpeg-user] Can someone point me to a libavformat file
>
> Thanks for the reply.
> i downloaded the avi file from here
> engr.colostate.edu/me/facil/dynamics/avis.htm
> <http://www.engr.colostate.edu/me/facil/dynamics/avis.htm> and did this
> [http://www.engr.colostate.edu/me/facil/dynamics/images/cbw3.jpg]<
> http://www.engr.colostate.edu/me/facil/dynamics/avis.htm>
>
> High Speed Camera Sample AVI's - Home - Walter Scott, Jr ...<
> http://www.engr.colostate.edu/me/facil/dynamics/avis.htm>
> www.engr.colostate.edu
> High Speed Camera Sample AVI's drop.avi (660K) flame.avi (282K) bird.avi
> (1.42MB) cbw3.avi (817KB)
>
>
>
> ffmpeg.exe -i flame.avi -an -vcodec copy stream1.h264, i am getting error
> on this.
>
> On Fri, Jun 1, 2018 at 1:26 PM, Moritz Barsnick <barsnick at gmx.net> wrote:
>
> > On Fri, Jun 01, 2018 at 11:33:26 +0530, Robert Clove wrote:
> > > Can someone point me to a libavformat file for which i can use the
> >
> > What is a libavformat file? You probably mean an AVI file?
> >
> > > following command ffmpeg -i abc.avi -an -vcodec copy stream.264
> >
> > Provided your ffmpeg supports H.264 encoding, e.g. with libx264, you
> > can create your own:
> >
> > $ ffmpeg -f lavfi -i testsrc2=d=10 -c:v libx264 abc.avi
> >
> > Cheers,
> > Moritz
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