[FFmpeg-user] ffmpeg -i reports a video of length 03:17.53, but splitting into frames at 2 fps only results in one frame

[Ted Park]

> On Jul 16, 2019, at 3:29 AM, Gyan <ffmpeg at gyani.pro> wrote:
> 
> On 16-07-2019 12:05 PM, Carl Eugen Hoyos wrote:
>> 
>> Am 16.07.2019 um 03:26 schrieb Ted Park <kumowoon1025 at gmail.com>:
>> 
>>>> $ ffmpeg -i video.mpg
>>>> ...
>>>> Input #0, mpeg, from 'video.mpg':
>>>> Duration: 00:03:17.53, start: 95444.217689, bitrate: 3602 kb/s
>>> The start time on the input file seems strange.
>> Start times != 0 are not uncommon for an MPEG stream.
> 
> This start time suggests an overflow.  2^33 / 90000 =  ~95443.718769 (26h 30m 43s).
> 
> Could be due to relative PTS offset of 0.5 s.
> 
> Gyan
> 

Indeed I meant the number seemed too big. But could you elaborate on how a “relative PTS offset of 0.5 s.” could lead to this? Just curious.