[FFmpeg-devel] [PATCH] Calculate and store mov bitrate

[haim alon]

Hi,

On Sat, Sep 26, 2009 at 11:13 PM, Baptiste Coudurier <
baptiste.coudurier at gmail.com> wrote:

> Hi,
>
> On 08/20/2009 06:47 AM, haim alon wrote:
>
>> Hi,
>> This patch calculates the actual bitrate of a mov file and stores it in
>> the
>> AVCodecContext structure.
>> Regards
>> Haim.
>>
>>
>> ffmpeg.bitrate.patch
>>
>>
>> Index: libavformat/mov.c
>> ===================================================================
>> --- libavformat/mov.c   (revision 19667)
>> +++ libavformat/mov.c   (working copy)
>> @@ -1399,6 +1399,8 @@
>>      unsigned int stss_index = 0;
>>      unsigned int stps_index = 0;
>>      unsigned int i, j;
>> +    int64_t stream_size = 0;
>> +    double duration;
>>
>> [...]
>>
> >
>
>> @@ -1468,6 +1471,8 @@
>>                  }
>>              }
>>          }
>> +        duration = (st->duration/(double)mov->time_scale);
>> +        st->codec->bit_rate = (stream_size*8.0)/duration;
>>
>
> You don't need a duration variable and mov->time_scale is wrong.
>
>
Can you recommend any alternative way to get the stream duration (in
seconds) ?

-- 
> Baptiste COUDURIER
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> FFmpeg maintainer                                  http://www.ffmpeg.org
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Thanks,
Haim.