[FFmpeg-user] framerate issues

[Calvin Arndt]

ffmpeg -y -loglevel 8 -i http://10.17.24.6/mjpg/video.mjpg -filter:v
fps=fps=7 -b 1536k -filter:v scale=720:480 /DVR/Tower/05-30_09-40.avi


ffprobe /DVR/Tower/05-30_09-40.avi
ffprobe version
2.8.15-0ubuntu0.16.04.1 Copyright (c) 2007-2018 the FFmpeg developers

built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 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 '/DVR/Tower/05-30_09-40.avi':
 Metadata:

encoder : Lavf56.40.101
 Duration: N/A, start: 0.000000, bitrate: N/A

Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p,
720x480 [SAR 32:27 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc 

I
specified 7fps yet ffprobe displays 25fps. I think the actual encoding
process is only encoding 7fps because playback is time compressed. 

I
know from previous experience that removing the -loglevel 8 will get
everything back to normal. Something is deeply askew here! 

By the way
this report applies to both head and this old version. 

-- 

 Calvin
Arndt
(217) 377-2979
carndt at macksrecycling.com