вс, 11 янв. 2026 г., 21:39 AVLinux via Cin <cin@lists.cinelerra-gg.org>:

Hi Cinners (lol)

Recently at my request you added H.264 Video codec options for MOV and
MKV containers and things are working well in general, I certainly don't
think further changes need to be made to Cin but for my own use and
workflow I'm thinking some further H.264 tweaks might be useful..?

I don't generally don't assemble long projects in Cin itself, I prefer
to make individual clips and put them together losslessly later with
some ffmpeg concatenation File Actions in AV Linux, or using the
'append' feature in Avidemux or even using TMPGEnc SmartRender 6 (in
Windows). As you know when you assemble clips this way they need to have
the same codecs and settings in order to assemble without re-encoding
and I would like to ensure that I'm able to use the H.264 Video from Cin
Rendering all the way to assembling. If I look at the H.264 options in
Cin the new H.264 options for MOV and MKV don't match the MP4 settings.
For example MKV and MOV have 'profile=high' and H.264 in MP4 doesn't use
the high profile and it has some keyint settings so when assembling I
get some reported errors because the H.264 Video clips I created with
MKV differ from clips I have made with MP4. I am not an H.264 guru or
expert so is there any reason that I can't combine the profile=high and
keyint settings and use the same H.264 settings across MP4, MKV and MOV?
Lastly, I am now hosting my Videos for streaming on my own website due
to numerous factors but mostly the proliferation of AI scraping by the
large tech companies, is there an extra setting I should be using in the
H.264 options to enhance streaming? Is this what the 'faststart' option
is for?

Oh, forgot about this part!

I think faststart helps if you files streamed as-is via html5 video element for example? More complex streaming schemas use bunch of fragments assembled by javascript in browser ... Lesser load on server, more on clients. Not really tried any of this, but at some point in time GPAC software/framework was only one that was able to put pcm sound inside mp4 container, alongside with h264 video. Nowadays ffmpeg should allow this too. Not sure if browsers will play this ... may be they hardwired to aac/opus as sound codecs?

Advice appreciated! Thanks for the continued work on Cin, having also
used both Davinci Resolve (on Windows) and Kdenlive over the past few
years I still have the best productivity with Cin!

Best, Glen

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