[FFmpeg-devel] Short last frame with movenc

[Al Crate]

Sadly not, I was using the API directly.

To reproduce the error you have to use the ffmpeg API, so you can 
specify the time_base in the format I mentioned, this causes the 
avformat mov handler to get upset and write out odd atoms in the 
quicktime it produces.

I'm now currently using libquicktime instead, this is using the latest 
version of ffmpeg for compression, but writing the quicktime container 
itself, this works correctly.


On 06/10/12 04:13, Michael Niedermayer wrote:
> On Thu, Sep 20, 2012 at 04:41:51PM +0100, Al Crate wrote:
>> Hi, I`m trying to encoded a prores movie into a mov container.
>>
>> This works fine with
>>
>> time_base.den = 24
>> time_base.num = 1
>>
>> But if I try
>>
>> time_base.den = 600
>> time_base.num = 25
>>
>> I get problems with moveenc setting the duration of the last frame
>> to 1, instead of 25.
>>
>> It looks like oformat->write_header() which is called in
>> avformat_write_header is setting the AVStream time_base to 600:1
>> instead of 600:25.
>>
>> Can some one reproduce this, I did a packet dump and the durations
>> are all 0.0002, whereas using 24/1 they come out with the correct
>> duration of 0.042.
>
> can you provide the input file you used and the command line so it
> can be reproduced ?
> i had no luck with a quick try with a random file
>
>
> [...]
>
>
>
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