#ffmpeg on 2025-04-09 — irc logs at libera.irclog.whitequark.org

2025-03-03 01:06 ChanServ changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.1.1 is released

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00:29 <CHR0N0S> Is it possible to get man pages installed for the library? When I installed OpenSSL for development, I was able to obtain man pages and I can call things like `man OPENSSL_cleanse` and it'll bring me to a man page for this stuff

00:30 <furq> pretty sure the api docs are only in doxygen

00:32 <CHR0N0S> Roger, thanks

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09:37 <derjanni> Any chance one could ever implement svq3 (video) and qdm2 (audio) encoders?

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11:55 <BtbN> patches are always welcome for new formats like that

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12:12 <derjanni> BtbN: is there a guide on how I could get started with it?

12:13 <BtbN> not really. Look at other similar encoders

12:13 <derjanni> Ok :)

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17:01 <derjanni> whats the best solution video/audio codec, transport protocol to encode live TV streams for MacOS 9.2 ?

17:05 <ChocolateArmpits> derjanni, do you want to store them after encoding?

17:05 <derjanni> no

17:05 <derjanni> I just want to watch TV on my MacOS 9 G3 iMac

17:07 <ChocolateArmpits> but you have another system to prepare those streams, right?

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17:08 <derjanni> yup, tons of them.

17:09 <derjanni> Linux, macOS, x86_64, arm64 whatever it takes as long as I can watch TV on MacOS9

17:10 <derjanni> I tried Sorenson 1 (svq1) and (aac) with QuickTime 6 which works for files, but not over HTTP

17:10 <derjanni> I tried Windows Media 7, but that thing only streams over MMS and the MMS protocol spec from Microsoft on their website is from 2017 which is incompatible with WM7/2001

17:10 <another|> Mpeg2, mp2, mpegts ?

17:11 <derjanni> lemme try

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17:14 <furq> m2v or xvid and aac should probably work

17:17 <derjanni> ffmpeg -i tagesschau.mp4 -vf fps=25 -f mpegts -b:v 250k -c:a mp2 -b:a 64k tagesschau.mpegts

17:17 <derjanni> ^ QuickTime says no

17:18 <furq> yeah that's probably a bigger issue

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17:18 <furq> i can guess what the cpu will be able to decode but i have no idea what quicktime will accept

17:18 <ChocolateArmpits> it would be good to check documentation for the quicktime version you're using and see what it natively supports

17:19 <furq> especially for streaming

17:19 <furq> and it's probably nontrivial to get any modern video player on there

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17:20 <ChocolateArmpits> the first document I found does mention support for mpeg-4 streaming (via whatever) and also rtsp, icecast and shoutcast

17:20 <derjanni> ChocolateArmpits: SVQ3 + QDM2 in an mp4 container

17:21 <derjanni> D.AIL. qdm2 QDesign Music Codec 2

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17:21 <ChocolateArmpits> don't you want to stream those channels rather than watch recordings?

17:21 <derjanni> I only want to stream them live, no need for any recording

17:21 <furq> apparently you have to buy m2v support

17:22 <derjanni> D.V.L. svq3 Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3

17:22 <derjanni> ffmpeg has no encoders for SVQ3 + QDM2

17:23 <furq> try xvid/mpeg4 and aac in mp4

17:26 <derjanni> thats a good one, but it did not like the audio

17:27 <furq> qt6 should support all that

17:27 <furq> which is apparently the last version that will run on g3

17:27 <derjanni> ffmpeg -i tagesschau.mp4 -vf fps=25 -f mp4 -c:v libxvid -b:v 250k -c:a aac -b:a 64k tagesschau_mac.mp4

17:27 <derjanni> will try aac_low

17:28 <furq> that's the default

17:29 <furq> you probably also want -af aresample=ochl=stereo

17:31 <derjanni> QuickTime 6 says: An Audio Elementary Stream Descriptor is corrupted. Actual size is 74; size field claims 54 instead.

17:31 <furq> maybe try mov instead of mp4 but i doubt that'll make any difference

17:33 <derjanni> according to qt6 docs its more picky with mov, I tried a ton of different things. It'll essentially only do mov over HTTP with svq3+qdm2

17:33 <derjanni> It does play fine from disk though

17:33 <furq> well streaming mp4 isn't going to work in general

17:33 <furq> i just meant for codec testing

17:33 <furq> i guess you could just try that in ts

17:34 <derjanni> docs: https://developer.apple.com/library/archive/documentation/QuickTime/QT6WhatsNew/qt6_new6.pdf

17:43 <derjanni> ffmpeg -i tagesschau.mp4 -vf fps=25 -f mp4 -c:v libxvid -b:v 250k -an quicktime_noaudio.mp4

17:44 <derjanni> ^ works without audio so I just got to figure out the audio then

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17:48 <ChocolateArmpits> One of the posts here suggests to use Darwnin Streaming Server as an intermediary and then use rtsp for delivery from there https://forum.videolan.org/viewtopic.php?t=23948

17:48 <ChocolateArmpits> also mentioend is the use of "mpga" audio encoder from vlc, probably mpeg-1 audio or mpeg-2 audio

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18:20 <derjanni> ffmpeg -i tagesschau.mp4 -vf fps=25 -f mov -c:v libxvid -b:v 250k -c:a aac -profile:a aac_low -b:a 127k -ac 2 -ar 44100 quicktime.mov

18:20 <derjanni> ^ ridiculuOS - QuickTime 6 accepts this in a MOV container but not in MP4

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18:23 <derjanni> It crashed... even with a beefy 8MB ATI Radeon

18:25 <derjanni> Also weird that QuickTime 6 accepts Xvid/mp4video but not Mr Sorenson the 1st

18:25 <derjanni> over HTTP

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18:32 <another|> Apple is very picky

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18:46 <derjanni> true, also dont want the G3 to fry, switching my testing to my MacOS9 VM now

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20:37 <derjanni> Thanks for your question regarding MS-MMSP. We’ve created case number ************ to track this issue. One of our Open Specifications team members will contact you soon.

20:37 <derjanni> ^ Microsoft Open Specifications Support

20:37 <derjanni> Am I closing in on my "Open Source Windows Media Server 2001" project?

20:37 <derjanni> Project code name "Michaelsoft Binbows Media"

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