[FFmpeg-user] Video Conversion Issues

[Govind Raj]

After trying to execute the syntax u said above i got the following
output(error). May i know what version u r using, i highlighted my version
here.

C:\Users\Administrator\Desktop\Kodak\FFmpeg-N-49957-g8c95d17\FFmpeg-N-49957-g8c9
5d17>ffmpeg -i sampleWMV.wmv -codec:v libx264 -crf 18 -preset veryslow
-tune fli
m -codec:a libfaac -ab 128k out.flv
*ffmpeg version N-58015-g8cdf4e0 Copyright (c) 2000-2013 the FFmpeg
developers*
*  built on Nov 10 2013 18:07:36 with gcc 4.8.2 (GCC)*
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 52.100 / 52. 52.100
  libavcodec     55. 41.100 / 55. 41.100
  libavformat    55. 21.100 / 55. 21.100
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 90.102 /  3. 90.102
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
[h264 @ 0000000003f27720] missing picture in access unit with size 9
    Last message repeated 39 times
Input #0, asf, from 'sampleWMV.wmv':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isomavc1
    encoder         : Lavf55.21.100
  Duration: 01:38:36.99, start: 0.000000, bitrate: 1091 kb/s
    Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv,
bt709), 128
0x544 [SAR 1:1 DAR 40:17], 24.42 fps, 23.98 tbr, 1k tbn, 47.95 tbc
    Stream #0:1: Audio: aac ([255][0][0][0] / 0x00FF), 48000 Hz, stereo,
fltp, 9
3 kb/s
Unknown encoder 'libfaac'


On Thu, Nov 14, 2013 at 10:32 PM, Tom Evans <tevans.uk at googlemail.com>wrote:

> On Thu, Nov 14, 2013 at 4:43 PM, Govind Raj <govind.durai at gmail.com>
> wrote:
> > May i know the syntax to convert WMV to FLV and MPG to FLV
> >
>
> You need to choose those options for yourself. The FLV format supports
> multiple video and audio codecs, you will need to choose codecs for
> both audio and video and tune the options so that the right size and
> quality of transcode is produced.
>
> Purely as an example, FLV supports H264 and AAC audio, so this might
> work, depending upon the source file:
>
> ffmpeg -i source.wmv \
>   -codec:v libx264 -crf 18 -preset veryslow -tune film \
>   -codec:a libfaac -ab 128k out.flv
>
> For more details on what options you can use, you can refer to the
> documention:
>
> http://ffmpeg.org/ffmpeg.html
>
> Cheers
>
> Tom
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