Alex Lin wrote:
Hi all,
I am using Windows 7 64 bit, and I downloaded the 64 bit version of
ffmpeg: ffmpeg-20140916-git-b76d613-win64-static.7z
I have spent the entire day experimenting with ffmpeg today but I haven't
quite figure out if ffmpeg is the right solution to my problem yet, so I
would like to get some opinions.
I am receiving H264 encoded packets through RTP with sample rate of 90,000,
and I need to record these packets. The file format doesn't really matter
at this point.
Currently, I have a server sending the H264 packets to port 50002 of my
machine (192.168.1.200), so I run the following ffmpeg command on my
machine:
ffmpeg -i udp://192.168.1.200:50002 -f mp4 hello.mp4
I might be tempted to set both video and audio codec to copy, and save in a .TS
file without -f at all.
If that works you can capture the information and then play with it from the
file. I am a Linux user,
so you may need guidance for Windows issues from an expert, but if you can
capture the data you
eliminate some possible problems by not reformatting the data at capture.
Then the following shows
ffmpeg version N-66289-gb76d613 Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 15 2014 22:11:04 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme
--enable-libgsm --enable-
libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
--enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvo-aacenc --
enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
The server starts sending video packets, and nothing happens on the command
prompt with the ffmpeg command.
The server stops sending video packets, and nothing happens still (I waited
for at least 5 minutes), so I pressed Ctrl+C, then I see this
udp://192.168.1.200:50002: Invalid data found when processing input
Received signal 2: terminating.
am I using ffmpeg correctly? and are the H264 packets I am receiving not
supported?
I have looked around and did not see any debug log generated by ffmpeg, so
I don't really know where else to look.
If it is necessary, I can provide a packet capture with the H264 packets.
--
bill davidsen <david...@tmr.com>
CTO TMR Associates, Inc
Unsigned numbers may not be negative. However, unsigned numbers may be
less than zero for suffiently large values of zero.
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