On 2021-03-02 16:34, Jim DeLaHunt wrote:
On 2021-03-02 13:13, Mark Filipak (ffmpeg) wrote:
On 2021-03-02 15:18, Carl Eugen Hoyos wrote:
…timebase is not 64bit, I believe this was already mentioned.
No, it has not been mentioned.
Mark, I can point to three times it has been mentioned, in the last month, in threads which you
initiated.
1. https://lists.ffmpeg.org/pipermail/ffmpeg-user/2021-February/051961.html
On 2021-02-14 17:28, Paul B Mahol wrote:
You need TB aka timebase too.
TB is rational.
PTS is 64bit integer.
2. https://lists.ffmpeg.org/pipermail/ffmpeg-user/2021-February/052097.html
On 2021-02-22 21:01, Jim DeLaHunt wrote:
The Presentation Time Stamp (PTS) value which FFmpeg associates with video frames and audio data
is a 64-bit integer. There is an associated time base attribute for each video or audio stream,
which gives the number of seconds between successive values of PTS. This time base might be
thought of as the resolution of PTS. Thus if you have two PTS values pts1 and pts2, then the
difference in seconds between them is (pts2-pts1)*time_base. The time base can be represented as a
rational number, e.g. 1001/30000.…
3. https://lists.ffmpeg.org/pipermail/ffmpeg-user/2021-February/052161.html
On 2021-02-26 17:32, Jim DeLaHunt wrote:
As I told you back on 23. February, ffmpeg uses a timebase that is a rational number, and is an
attribute of the video stream, and can take various values. The timebase could be 1/360000, or
1/24, or 1001/24000.
Thank you, Jim. To the best of my knowledge, rational is not a 'C' datatype. I need to know the
dimension (or 'C' datatype) of TB as it is used in PTC calculations.
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