[FFmpeg-user] Wrong TC read with doubled Framenumber read out when input is 50p
Björn Büchel
bjoernbuechel at me.com
Sun Nov 6 22:35:47 EET 2022
Hi Bouke,
Thanks for the reply. You are right, that makes no sense. But this is what I found out.
I checked the TC with Avid Media Composer as well as with Resolve and Premiere.
In all three Apps the TC is identical.
Björn
—-
Björn Büchel
Am Hüpplingsgraben 5
42799 Leichlingen
0152 / 051 051 00
bjoernbuechel at me.com
> Am 06.11.2022 um 11:10 schrieb Bouke / Videotoolshed <bouke at videotoolshed.com>:
>
>
>>
>> On 6 Nov 2022, at 08:42, Björn Büchel via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:
>>
>> Hi, when I pass a 50p h264 or h265 Video to "ffmpeg -i" without any further code the console shows the "TC In" of the Video. But the Frame coloumn of the File is doubled so the output has the wrong TC.
>> e.g.
>> orginial File TC: 10:00:00:05
>> ffmpeg -i shows: 10:00:00:10
>>
>> or e.g.
>> orginial File TC: 10:00:00:45
>> ffmpeg -i shows: 10:00:01:40
>>
>> Is this a known issue or does anyone have a workaround?
>
> This I’ve never seen. I know that the TC is written as frames in Mov, Mp4 and MXF, so you need the frame rate to convert to HH MM SS FF
> This sometimes goes wrong, so different apps calculate different TC values, but that is always the entire number doubled / halved.
> In your case only the frames are doubled, this makes no sense, a frames to tc routine will not use a different FPS for hours / minutes / seconds and frames.
>
> When you say ‘original File TC’, what makes you so sure that is indeed correct? What software tells you that? Did you try other apps? (Resolve / Premiere / Avid / Quicktime player / whatever you have.)
>
> Bouke
>
>
>> I would appreciate your help.
>> Björn
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>> To unsubscribe, visit link above, or email
>> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
>
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
More information about the ffmpeg-user
mailing list