[FFmpeg-user] reduce laltency when streaming udp multicast

[Jacobs]

this is the ffprobe report:

ffprobe started on 2013-04-15 at 13:08:15
Report written to "ffprobe-20130415-130815.log"
Command line:
"d:\\ffmpeg\\ffprobe.exe" udp://224.1.1.1:1234 -report
ffprobe version N-46469-gc995644 Copyright (c) 2007-2012 the FFmpeg
developers
  built on Nov  5 2012 17:58:15 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads
--enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r
--enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut
--enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinger --enable-libspeex --enable-libtheora
--enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs
--enable-libxvid --enable-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[mpegts @ 00000000020df460] Format mpegts probed with size=2048 and
score=100
[mpegts @ 00000000020df460] Unable to seek back to the start
[mpegts @ 00000000020df460] stream=0 stream_type=10 pid=100 prog_reg_desc=
[mpegts @ 00000000020df460] File position before avformat_find_stream_info()
is 9400
[mpeg4 @ 00000000020f0620] hmm, seems the headers are not complete, trying
to guess time_increment_bits
[mpeg4 @ 00000000020f0620] my guess is 4 bits ;)
[mpeg4 @ 00000000020f0620] Error, header damaged or not MPEG4 header
(qscale=0)
[mpegts @ 00000000020df460] invalid dts/pts combination 35476000
[mpeg4 @ 00000000020f0620] looks like this file was encoded with
(divx4/(old)xvid/opendivx) -> forcing low_delay flag
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35486000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35496000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35506000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35516000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35526000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35536000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35546000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35556000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35566000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] invalid dts/pts combination 35576000
[mpeg4 @ 00000000020f0620] [IMGUTILS @ 000000000022f420] Picture size 0x0 is
invalid
[mpeg4 @ 00000000020f0620] video_get_buffer: image parameters invalid
[mpeg4 @ 00000000020f0620] get_buffer() failed (-1 0 0000000000000000)
[mpegts @ 00000000020df460] max_analyze_duration 5000000 reached at 5000000
[mpegts @ 00000000020df460] Estimating duration from bitrate, this may be
inaccurate
[mpegts @ 00000000020df460] File position after avformat_find_stream_info()
is 208680
Input #0, mpegts, from 'udp://224.1.1.1:1234':
  Duration: N/A, start: 394.177778, bitrate: N/A
  Program 1 
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100], 56, 1/90000: Video: mpeg4 (Simple Profile)
([16][0][0][0] / 0x0010), yuv420p, 400x640 [SAR 1:1 DAR 5:8], 9 fps, 9 tbr,
90k tbn, 9 tbc
[mpeg4 @ 00000000020f0620] detected 8 logical cores
[AVIOContext @ 00000000020f02a0] Statistics: 208680 bytes read, 0 seeks




--
View this message in context: http://ffmpeg-users.933282.n4.nabble.com/reduce-laltency-when-streaming-udp-multicast-tp4658488p4658489.html
Sent from the FFmpeg-users mailing list archive at Nabble.com.