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

tasos tasoss at trigonongroup.com
Wed Aug 2 01:22:11 EEST 2017


Hello and thanks for replying.
This is what ffprobe gives me(i should have mentioned it earlier)

>     Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(tv, 
> bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 5593 kb/s, 50 fps, 25 
> tbr, 50 tbn, 50 tbc


On 8/2/2017 1:01 AM, Simon Brown wrote:
> 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
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