On Tue, Feb 13, 2024 at 7:21 PM Mark Filipak <markfilipak.i...@gmail.com> wrote:
> On 13/02/2024 03.24, Paul B Mahol wrote: > > On Tue, Feb 13, 2024 at 12:37 AM Carl Zwanzig <c...@tuunq.com> wrote: > > Paul, Carl, I assume you are both familiar with the source code. I'm not. > > Fact: '-ss'-before-'-i' and '-i'-before-'-ss' _do_ give different results. > I suggested that the > difference might result from the way that FFmpeg is designed. > Not fact, your logic and math skills are really poor, reconsider additional real educational summer camp. > > I mentioned dynamic versus static architectures. When thinking about > dynamic versus static think > "build up/tear down" versus "call". "Build up/tear down" versus "call" has > to do with implementation > -- how FFmpeg runs jobs -- not whether the job is streaming or real-time. > In H.222, ISO & ITU imply > (to me) that they had "build up/tear down" in mind when they created the > system model they created. > > The question is this: Should '-ss'-before-'-i' and '-i'-before-'-ss' give > different results? They > _do_, but _should_ they? > No, it might or might not give different results. > > Set aside for the moment that '-ss'-before-'-i' and '-i'-before-'-ss' make > differing cuts (at > differing PTSs) that are hundreds of frames different. > Set aside for the moment that '-ss'-before-'-i' honors '-muxdelay 0' but > '-i'-before-'-ss' doesn't. > Set aside for the moment that both of them cut the 'earliest' audio > packets but both leave some > 'too-early' audio packets in their results. > Set aside for the moment that both of them include video packets that have > 'too-early' PTSs that > should have been cut. > > None of that matters for now. > > I can't submit a bug ticket unless I know whether '-ss'-before-'-i' and > '-i'-before-'-ss' should > give the same results. After that is established and I submit a ticket, > assuming the answer is that > they should be the same, then all the other details will be hashed out and > all the fighting will > occur in ... github? Is it github? I think so. > There is nothing to fix, bug is not here. > > Please help with this if you can. > > --Mark. > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".