[FFmpeg-user] Possible to encode a file with a broken header?

[Mr M]

On Sun, Nov 25, 2012 at 4:00 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Mr M <redpenguinmail <at> gmail.com> writes:
>
>> On Sun, Nov 25, 2012 at 3:16 AM, Carl Eugen Hoyos wrote:
>> > Mr M <redpenguinmail <at> gmail.com> writes:
>> >
>> >> I uploaded my file CI-No-Video-Sample.flv to the mplayer ftp server
>> >
>> > I get no audio for that sample...
>> >
>> >> and my command I am trying to use is:
>> >>
>> >> ffmpeg -i FILE.flv -vcodec libxvid -b:v 981k -r 29.970 -acodec
>> >> libmp3lame -b:a 128k -async 1 FILE.avi
>> >
>> > Complete, uncut console output missing.
>
>> http://pastebin.com/xre4s2S0
>
> Please do not use external resources to explain a problem
> (they tend to disappear), post all necessary information
> on the mailing list (especially if the output is as short
> as in your case).
>
>> Stream #0:1: Audio: mp3, 22050 Hz, stereo, s16, 48 kb/s
>
> I can't reproduce this line here, are you sure you tested
> the same sample that you uploaded?
>
> Carl Eugen
>
>

It appeared to be some problem with duration.

I looked up the message about analyzeduration and probesize and found this page:

http://stackoverflow.com/questions/11659267/fresh-ffmpeg-on-10-04-could-not-find-codec-parameters

and increasing both values to a bigger size, ffmpeg now reports there is video.