[Ffmpeg-devel] Re: [PATCH] x264 avc encoding, movenc avcC, ctts

[Baptiste COUDURIER]

Michael Niedermayer wrote:
> [...]
> 
> 
> use trk->cluster[cl][id].cts= (pkt->pts - pkt->dts) * enc->time_base.num;
> 

Humm. Here is what I get:

from generated sample (using pkt->pts - pkt->dts) * enc->time_base.num

timescale : 25
stts : count 22 duration 1

count 1, duration 3600
count 1, duration 10800
count 2, duration 0
count 1, duration 10800
count 2, duration 0
count 1, duration 10800
count 2, duration 0
count 1, duration 7200
count 1, duration 0
count 1, duration 3600
count 1, duration 10800
count 2, duration 0
count 1, duration 10800

...

from H264_GOP125.mp4 generated by FCP:

timescale : 2500
stts : count 201 duration 100

count 1, duration 100
count 1, duration 200
count 1, duration 0
count 1, duration 200
count 1, duration 0
count 1, duration 200
count 1, duration 0
count 1, duration 200
count 1, duration 0
count 1, duration 200
count 1, duration 0

...

pkt->dts - pkt->pts is a multiple of pkt->duration, the latter being 3600.

If I rescale I will get the right values. I must be missing something.

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Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
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