[Xvid-devel] I set FPS to 120, encode 240 frames, and the video plays back over some 8-10 seconds

[Elio Blanca]

Further, I would suggest some useful free tools that can tell you many details about the resulting 
stream, such as "mplayer" (it is a command line tool, better results with `mplayer -identify 
video_stream_name'), "avidemux" and "media player classic - home cinema", any of them can report 
which frame rate has been set in the container header in order to clarify where the error lies.




Il 03/06/2014 11:14, Michael Militzer ha scritto:
> Hi,
>
> the first questions are: Which program/API do you use to encode your file?
> And which program do you use to decode/playback?
>
> Note that framerate information is not only written by the encoder into the
> encoded bitstream but container formats (like AVI) have a framerate setting
> in their container headers as well. The framerate as written in the
> container usually precedes the framerate setting that the encoder wrote into
> the bitstream.
>
> In practice this means that if you e.g. write your video into AVI output
> but don't set the framerate of the AVI properly, you can specify whatever
> framerate you want in Xvid encoder settings but it will have no effect when
> playing the file (because the AVI framerate precedes).
>
> Best regards,
> Michael
>
>
> Quoting Robin Colclough <rcc at sentel-advance.com>:
>
>> I´m using the xvid encoder in non-realtime to encode frames, but its
>>   like xvid ignores the FPS I set, and records at the incoming speed.
>>
>> I set the FPS to 120, then encode 240 frames, i.e, 2 seconds of
>> video, put the playback file is wrong, and runs at around the same
>> speed I sent the frames in.
>>
>> Why would this happen?
>> _______________________________________________
>> Xvid-devel mailing list
>> Xvid-devel at xvid.org
>> http://list.xvid.org/mailman/listinfo/xvid-devel
>>
>>
>
>
>
>
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