[Ffmpeg-devel] PTS values
Wed Jan 3 01:23:28 CET 2007
3 jan 2007 kl. 00.25 skrev Anders Moden:
> 19 dec 2006 kl. 23.06 skrev Paul Curtis:
>> Anders Moden wrote:
>>> Is there any docs that explains the various pts values found in
>>> the stream, the image and the codec. i can find at least 4 pts
>>> struct members with various values when decoding?
>> That was my problem, also. The discussion concerned which values
>> were valid after a call to audio_decode or video_decode with
>> "finished" == true. After much experimentation, I found the
>> cur_dts to have a valid, monotonically increasing value that was
>> usable for the encoder.
>> I never did find any docs that explained when each of the pts/dts
>> values were valid ... so I built a small program that did nothing
>> but print the values out. I never got a firm answer on which ones
>> I should use ....
> Too bad. Havn't found the right discussion yet and I haven't tested
> the cur_dts yet. However I think it is really bad this information
> shall be so difficult to find.
> I think the ffmpeg project needs some proper system description !
> My original question was why I got unordered pts values using
> avcodec_decode_video(m_pVideoCodecCtx, m_pFrame, &frameFinished,
> packet.data, packet.size) in the m_pFrame struct ? Please can
> someone answer this if the images I get are unsorted then ?
Ok. Just found a bunch of topics covering PTS etc.
In my case I have a variable fps so interpolating frame time is
difficult. Is the cur_dts the answer to this problem ?
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