[FFmpeg-user] ffmpeg reported fps different than actual file's

[Simon Brown]

On 1 August 2017 at 22:59, tasos <tasoss at trigonongroup.com> wrote:

> Hello.
> I get a video file with
>
> ffmpeg -y       -i /dev/dvb/adapter0/dvr0 -c:v copy -c:a copy   foo.avi
>>
> This file is displayed  on vlc  as a 50fps video file.
>
> Input #0, mpegts, from '/dev/dvb/adapter0/dvr0':
>>   Duration: N/A, start: 7972.129344, bitrate: N/A
>>   Program 1
>>     Stream #0:0[0x6e]: Video: h264 (High) ([27][0][0][0] / 0x001B),
>> yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25
>> tbr, 90k tbn, 50 tbc
>>     Stream #0:1[0x78]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
>> stereo, s16p, 128 kb/s
>>     Stream #0:2[0x82]: Audio: mp3 ([3][0][0][0] / 0x0003), 0 channels,
>> s16p
>>
> 25 fps,25 tbr.
> So my question is,is this correct?
> Thanks!
>
> My guess is that VLC is misreporting it, and it's 50 fields per second,
interlaced, and so FFMpeg is reporting it as 25 frames per second correctly.

I have seen something similar myself between the two.
Regards,
Simon