[FFmpeg-user] About the slow motion with FFmpeg

[PyProg PyProg]

Hi all,

I'm doing a slow motion effect with FFmpeg, but the resulting video is
jerky when read with VLC. This is the original video:

http://glouk.legtux.org/divers/billes_00001.webm

.... here is the video after application of slow motion with FFmpeg
(sorry I had to cut the video because otherwise it does not pass on
the ftp server I use):

http://glouk.legtux.org/divers/billes_ralenti_decoup.avi

What should be done to make the slow motion is well fluid without being choppy?

Here is the result in the terminal:

angelo at angelo-kubuntu:~$
/home/angelo/ekd_toto/linux_dependances_portables/ffmpeg/ffmpeg -i
"/home/angelo/blender/billes_00001.webm" -vf "setpts=3.20*PTS,yadif"
-an -qscale 0 -threads 4 -y
"/home/angelo/a/nouv_EKD/video/version_3/filtres_vidéo/29_12_12_ekd_filtre_ralenti_valeur_320.avi"
ffmpeg version N-47559-gf5d6b0c Copyright (c) 2000-2012 the FFmpeg developers
  built on Dec  7 2012 05:11:34 with gcc 4.6 (Debian 4.6.3-1)
  configuration: --prefix=/root/ffmpeg-static/32bit --arch=x86_32
--extra-cflags='-m32 -I/root/ffmpeg-static/32bit/include -static'
--extra-ldflags='-m32 -L/root/ffmpeg-static/32bit/lib -static'
--extra-libs='-lxml2 -lexpat -lfreetype' --enable-static
--disable-shared --disable-ffserver --disable-doc --enable-bzlib
--enable-zlib --enable-postproc --enable-runtime-cpudetect
--enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis
--enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype
--enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc
--enable-libvo-amrwbenc --enable-version3 --enable-libvpx
  libavutil      52. 11.102 / 52. 11.102
  libavcodec     54. 79.100 / 54. 79.100
  libavformat    54. 47.100 / 54. 47.100
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 25.101 /  3. 25.101
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, matroska,webm, from '/home/angelo/blender/billes_00001.webm':
  Duration: 00:00:10.96, start: 0.000000, bitrate: 1219 kb/s
    Stream #0:0: Video: vp8, yuv420p, 1280x720, SAR 1:1 DAR 16:9, 25
fps, 25 tbr, 1k tbn, 1k tbc (default)
    Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp (default)
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, avi, to
'/home/angelo/a/nouv_EKD/video/version_3/filtres_vidéo/29_12_12_ekd_filtre_ralenti_valeur_320.avi':
  Metadata:
    ISFT            : Lavf54.47.100
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x720
[SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 tbn, 25 tbc (default)
Stream mapping:
  Stream #0:0 -> #0:0 (vp8 -> mpeg4)
Press [q] to stop, [?] for help
frame=  273 fps= 63 q=0.0 Lsize=    7514kB time=00:00:35.00
bitrate=1758.7kbits/s
video:7488kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.350729%

a+

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