ffmpeg -i rtsp://ip/videoSub
 -i rtsp://ip/videoSub -filter_complex "nullsrc=size=320x480 [base]; [0:v] setpts=PTS-STARTP
TS, scale=320x240 [upperleft]; [1:v] setpts=PTS-STARTPTS, scale=320x240 [lowerleft]; [base][upperleft] overlay=shortest=
1 [tmp1]; [tmp1][lowerleft] overlay=shortest=1:y=240" -c:v libx264 -f mpegts udp://239.101.101.1:1234
ffmpeg version N-67227-g39680ca Copyright (c) 2000-2014 the FFmpeg developers
  built on Oct 27 2014 22:10:36 with gcc 4.9.1 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfi
g --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-lib
opencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
r --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-zlib
  libavutil      54. 11.100 / 54. 11.100
  libavcodec     56. 10.100 / 56. 10.100
  libavformat    56. 11.100 / 56. 11.100
  libavdevice    56.  2.100 / 56.  2.100
  libavfilter     5.  2.100 /  5.  2.100
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[rtsp @ 0000000002b11120] decoding for stream 0 failed
Guessed Channel Layout for  Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://ip/videoSub':
  Metadata:
    title           : IP Camera Video
    comment         : videoSub
  Duration: N/A, start: 0.000000, bitrate: 64 kb/s
    Stream #0:0: Video: h264 (Baseline), yuv420p, 320x240, 90k tbr, 90k tbn, 180k tbc
    Stream #0:1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
Guessed Channel Layout for  Input Stream #1.1 : mono
Input #1, rtsp, from 'rtsp://ip/videoSub':
  Metadata:
    title           : IP Camera Video
    comment         : videoSub
  Duration: N/A, start: 0.000000, bitrate: 64 kb/s
    Stream #1:0: Video: h264 (Baseline), yuv420p, 320x240, 90k tbr, 90k tbn, 180k tbc
    Stream #1:1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
[libx264 @ 00000000052f1020] using SAR=1/1
[libx264 @ 00000000052f1020] using cpu capabilities: MMX2 SSE2Fast LZCNT
[libx264 @ 00000000052f1020] profile High, level 2.1
Output #0, mpegts, to 'udp://239.101.101.1:1234':
  Metadata:
    title           : IP Camera Video
    comment         : videoSub
    encoder         : Lavf56.11.100
    Stream #0:0: Video: h264 (libx264), yuv420p, 320x480 [SAR 1:1 DAR 2:3], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc56.10.100 libx264
    Stream #0:1: Audio: mp2, 16000 Hz, mono, s16, 160 kb/s
    Metadata:
      encoder         : Lavc56.10.100 mp2
Stream mapping:
  Stream #0:0 (h264) -> setpts (graph 0)
  Stream #1:0 (h264) -> setpts (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (pcm_mulaw (native) -> mp2 (native))
Press [q] to stop, [?] for help
[mpegts @ 00000000052f00c0] Non-monotonous DTS in output stream 0:1; previous: 189996, current: 185484; changing to 1899
97. This may result in incorrect timestamps in the output file.
[mpegts @ 00000000052f00c0] Packets poorly interleaved, failed to avoid negative timestamp -4494 in stream 0
try -max_interleave_delta 0 as a possible workaround
[mpegts @ 00000000052f00c0] Packets poorly interleaved, failed to avoid negative timestamp -894 in stream 0
try -max_interleave_delta 0 as a possible workaround
frame=  295 fps= 26 q=-1.0 Lsize=     632kB time=00:00:21.70 bitrate= 238.4kbits/s
video:108kB audio:428kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 17.846645%
[libx264 @ 00000000052f1020] frame I:2     Avg QP:17.52  size: 34120
[libx264 @ 00000000052f1020] frame P:74    Avg QP:19.45  size:   456
[libx264 @ 00000000052f1020] frame B:219   Avg QP:33.62  size:    41
[libx264 @ 00000000052f1020] consecutive B-frames:  1.0%  0.0%  0.0% 99.0%
[libx264 @ 00000000052f1020] mb I  I16..4: 11.1% 23.5% 65.4%
[libx264 @ 00000000052f1020] mb P  I16..4:  0.1%  0.0%  0.0%  P16..4: 17.0%  1.0%  1.0%  0.0%  0.0%    skip:80.8%
[libx264 @ 00000000052f1020] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  4.8%  0.0%  0.0%  direct: 0.0%  skip:95.2%  L0:25
.9% L1:74.1% BI: 0.0%
[libx264 @ 00000000052f1020] 8x8 transform intra:22.8% inter:75.5%
[libx264 @ 00000000052f1020] coded y,uvDC,uvAC intra: 89.2% 47.7% 37.9% inter: 0.7% 3.1% 0.6%
[libx264 @ 00000000052f1020] i16 v,h,dc,p: 10%  5% 12% 73%
[libx264 @ 00000000052f1020] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27%  7% 13%  8%  7%  8%  7% 12% 12%
[libx264 @ 00000000052f1020] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 14% 15% 11%  8%  6%  8%  9%  8%
[libx264 @ 00000000052f1020] i8c dc,h,v,p: 79%  9%  8%  4%
[libx264 @ 00000000052f1020] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 00000000052f1020] ref P L0: 76.0%  0.9% 15.6%  7.5%
[libx264 @ 00000000052f1020] ref B L0: 91.1%  8.6%  0.3%
[libx264 @ 00000000052f1020] ref B L1: 90.6%  9.4%
[libx264 @ 00000000052f1020] kb/s:75.27
Received signal 2: terminating.

C:\Users\c\Desktop\ffmpeg-20141028-git-39680ca-win64-static\bin>