GAVF-DEMUX(1)

GAVF-DEMUX 💅✨

okay so bestie, welcome to gavf-demux — yes it's section 1 of the User Manuals, yes it's the Gavf Demultiplexer, and yes we're gonna go through the whole thing together because you deserve to actually understand it 🫶

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🌸 NAME 🌸

gavf-demux — the Gavf Demultiplexer. that's it, that's the name, she's iconic, she does one thing and she does it 💖

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✨ SYNOPSIS ✨

gavf-demux [options]

just the command and whatever options you're feeling today. no positional args, no drama 💅

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🦋 DESCRIPTION 🦋

gavf demuxer. literally that. she demuxes gavf. main character energy, zero filler 😌

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🎀 OPTIONS 🎀

okay this is the big section, grab a snack 🍓

• -i <input_file> — the input file or location. where the good stuff comes from 💖
• -iopt param1=val1[&param2=val2...] — input options, chained together with & like a little friendship bracelet of parameters. here's what you can pass:
  • dh=[1|0] (default: 0) — dump gavf headers. use this for debugging 🐛
  • dp=[1|0] (default: 0) — dump gavf packets. use this for debugging 🐛
  • dm=[1|0] (default: 0) — dump inline metadata. use this for debugging 🐛
  • to=<number> (500..100000, default: 5000) — timeout, in milliseconds ⏱️
  • nomsg=[1|0] (default: 0) — no messages. don't even try to make a back-channel for messages. forward messages might still be sent tho, so don't come for her 👀
• -as <stream_selector> — comma separated list of characters: 'd' (decode), 'm' (mute) or 'c' (read compressed). audio stream selector, pick your fighters 💜
• -vs <stream_selector> — same deal, comma separated list of 'd' (decode), 'm' (mute) or 'c' (read compressed). this one's for video 🎬
• -ts <stream_selector> — comma separated list of characters, but text only gets 'm' (mute) or 'c' (read). no 'd' here, she's built different ✍️
• -os <stream_selector> — comma separated list of 'd' (decode), 'm' (mute) or 'c' (read compressed). overlays, slay 🦋
• -oa <output> — output file or location for audio. use this option multiple times to add more outputs, she's polyamorous with files 💅
• -ov <output> — output file or location for video. also stackable, use it multiple times for more outputs 🎥
• -ot <output> — output file or location for text. yep, multiple times, multiple outputs 📝
• -oo <output> — output file or location for overlays. multiple times, more outputs, no cap 🎨
• -pre <prefix> — output file prefix. the little name-tag every output gets 🏷️
• -oopt param1=val1[&param2=val2...] — output options, again chained with &. here's the menu:
  • shm=<number> (default: 1024) — SHM threshold. this selects the minimum packet size for using shared memory for a stream. non-positive values disable shared memory completely ⚠️
  • to=<number> (500..100000, default: 5000) — timeout, in milliseconds ⏱️
  • dp=[1|0] (default: 0) — dump gavf packets. use this for debugging 🐛

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💜 GENERIC OPTIONS 💜

these ones are the shared besties — the following generic options are available for all gmerlin applications 🌈

• -help — print this help message and exit. bye 👋
• -help-man — print this help message as a manual page and exit 📖
• -help-texi — print this help message in texinfo format and exit 📚
• -version — print version info and exit 🏷️
• -v level — set verbosity level (0..4). pick your volume, queen 🔊
• -syslog name — log to syslog under the specified name 📡
• -stderr — always log to stderr. old reliable 💅

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🧚 FILES 🧚

where she keeps her stuff:

• ~/.gmerlin/plugins.xml — cache of the plugin registry (shared by all applications, so everybody's in on it) 🫶
• ~/.gmerlin/generic/cfg.xml — default plugin parameters are read from there. use gmerlin_plugincfg to change them ✨

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real talk: those dh, dp and dm flags are debugging tools — they're there to help you see what's going on, not to be your everyday vibe 😭

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and that's the whole page, bestie!! this beauty comes to you from Gmerlin, dated 2025-09-26 — go forth, demux responsibly, and remember: every flag counts, no skipping, periodt 💖👑✨