Termux•12mo ago

problem with installing ffmpeg with --enable-libxcb in termux

hello, is there any way to enable libxcb when installing ffmpeg on termux?

i can't seem to directly enable this when installing ffmpeg in termux (

pkg i ffmpeg

pkg i ffmpeg

), so i resort to rebuilding it from the git repo. but for some reason

Error: libxcb is requested, but not found

Error: libxcb is requested, but not found

even though checking on the installed packages, there is libxcb!!!

so i am currently stuck, if anyone have any fixes or ways for this i would appreciate it. thanks!

qlufoOP•1/2/25, 6:31 AM

There are some sources stating that --enable-libxcb set as true by default when installing ffmpeg

even just plain doesn't work

Screenshot_2025-01-02-13-30-32-34_84d3000e3f4017145260f7618db1d683.jpg

Qqlufo There are some sources stating that --enable-libxcb set as true by default when ...

TomIO•1/2/25, 6:37 AM

If you're trying to build on-device you're gonna have a bad time.
It's a very complex package with a lot of compile time dependencies.

Looks like we're not currently building with .
We do have a package, so let me make a pull request to enable it on our FFMPEG package.

It looks like is only used by the x11grab input device type.
Which seems to do a "direct" capture of the specified X11 display.
Should probably work if enabled.

I'll report back when the PR is open.

qlufoOP•1/2/25, 6:42 AM

indeed
i am using ffmpeg as a "direct" capture in an x11 desktop environment. some might suggest to just use the android's build-in recorder, but its far convenient to just record it directly (and how usually i don't have access to keyboard or mouse peripherals, so it will look janky).

i have a prior script that records the x11 using ffmpeg on my proot, it works really great! but i since moved to use termux directly instead of proot, and using the provided package available in termux doesn't seem to be as smooth as ffmpeg

thanks for the help, and I'll be waiting for the new update/fix to this

TomIO•1/2/25, 6:54 AM

The build script could use a little cleanup while I'm here...
Give me like 15 minutes to do some build tests.

TomIO•1/2/25, 7:15 AM

PR is up.
https://github.com/termux/termux-packages/pull/22738

GitHub

Ffmpeg enable `libxcb` support. by TomJo2000 · Pull Request #22738 ...

This was requested by user qlufotera in Discord.
https://discord.com/channels/641256914684084234/1324260321371885608/1324260321371885608
libxcb is used by the x11grab input device type, used to dir...

TomIO•1/2/25, 7:18 AM

Yep that worked.

TomIO•1/2/25, 7:19 AM

Haven't tested the actual input type.
If you'd like to test the package before it is merged I have left instructions in the PR.

TTomIO Yep that worked.

qlufoOP•1/2/25, 7:55 AM

Awesome
unfortunately as i test it... uhh...

Screenshot_2025-01-02-14-54-47-04_00df01c412509efb9bd6450c382822af.jpg

TomIO•1/2/25, 7:56 AM

What was the command you used for testing?

qlufoOP•1/2/25, 7:56 AM

oh yeah.
apologies, but i forgot ffmpeg also has pulseaudio option for capturing the audio

Screenshot_2025-01-02-14-54-13-97_00df01c412509efb9bd6450c382822af.jpg

TTomIO What was the command you used for testing?

qlufoOP•1/2/25, 7:58 AM

here you go

Qqlufo oh yeah. apologies, but i forgot ffmpeg also has pulseaudio option for capturing...

TomIO•1/2/25, 7:58 AM

Please be aware that your local copy of the FFMPEG source repo is not going to reflect the flags we use for building the package.

But yeah PulseAudio is also not currently enabled on our FFMPEG package, and would likely require additional patching to work properly.
It's worth a try though.

Qqlufo here you go ``` ffmpeg -video_size 1280x720 -framerate 20 -f xcbgrab -i :0.0 -f...

TomIO•1/2/25, 7:59 AM

What does return?

TTomIO What does `echo $DISPLAY` return?

qlufoOP•1/2/25, 8:00 AM

still
even switching it to target

qlufoOP•1/2/25, 8:00 AM

doesn't seem to work

TomIO•1/2/25, 8:00 AM

Same error?

qlufoOP•1/2/25, 8:00 AM

spits out the same error...

TomIO•1/2/25, 8:01 AM

Oh I think I see the problem.
The input format is called not

TTomIO Oh I think I see the problem. The input format is called `x11grab` not `xcbgrab`

qlufoOP•1/2/25, 8:02 AM

oh yeah
i got this script with the help of the internet and tweak it a bit (lol)
i used this script on proot, yes it did work great and functional. after moving it to termux, i searched the problem related to that on the internet

qlufoOP•1/2/25, 8:02 AM

apparently is deprecated on newer ffmpeg versions

TomIO•1/2/25, 8:03 AM

Not surprising.

qlufoOP•1/2/25, 8:05 AM

is there anything yet that i might've missed?

TomIO•1/2/25, 8:05 AM

doesn't seem to exist from what I can tell.

qlufoOP•1/2/25, 8:06 AM

ahh

qlufoOP•1/2/25, 8:07 AM

perhaps i should change my script a bit

TomIO•1/2/25, 8:07 AM

Using a video codec that exists wouldn't be a bad start.

TomIO•1/2/25, 8:09 AM

V4L2 would likely be a non-starter on Termux regardless as Android doesn't usually ship the Video for Linux v2 kernel module.

TTomIO V4L2 would likely be a non-starter on Termux regardless as Android doesn't usual...

qlufoOP•1/2/25, 8:11 AM

Alright
used
sadly... same error

qlufoOP•1/2/25, 8:11 AM

TomIO•1/2/25, 8:11 AM

I'm no FFMPEG wizard unfortunately.

Qqlufo Awesome unfortunately as i test it... uhh...

qlufoOP•1/2/25, 8:12 AM

i understand
but it still questions me how it's not recognized here...

TomIO•1/2/25, 8:14 AM

Here's the example from the FFMPEG documentation.

TomIO•1/2/25, 8:14 AM

Does that do anything?

qlufoOP•1/2/25, 8:17 AM

Alright ill try

TTomIO Here's the example from the FFMPEG documentation. ``` ffmpeg -f x11grab -framera...

qlufoOP•1/2/25, 8:19 AM

Oof same error

qlufoOP•1/2/25, 8:20 AM

Unknown input format

TomIO•1/2/25, 8:23 AM

What's spit out?

TTomIO What's `ffmpeg -devices` spit out?

qlufoOP•1/2/25, 8:25 AM

TomIO•1/2/25, 8:25 AM

Did you have to cut off the rest or is that all?

qlufoOP•1/2/25, 8:25 AM

Thats all

TomIO•1/2/25, 8:26 AM

That's a whole lot of not much.

TTomIO That's a whole lot of not much.

qlufoOP•1/2/25, 8:26 AM

oh...

TomIO•1/2/25, 8:26 AM

Here's what I get on my PC's version of FFMPEG.

TTomIO Here's what I get on my PC's version of FFMPEG. ``` # [...] compiler options omi...

qlufoOP•1/2/25, 8:27 AM

Hmm
so what can i do to resolve this?

TomIO•1/2/25, 8:28 AM

I'm gonna guess nothing.
This is gonna need further troubleshooting by the looks of it.

TTomIO Here's what I get on my PC's version of FFMPEG. ``` # [...] compiler options omi...

qlufoOP•1/2/25, 8:29 AM

How about your own mobile device? (Termux)

qlufoOP•1/2/25, 8:29 AM

Since you explicitly said your PC one?

TomIO•1/2/25, 8:29 AM

Only getting on my phone.

ffmpeg version 7.1 Copyright (c) 2000-2024 the FFmpeg developers built with Android (12470979, +pgo, +bolt, +lto, +mlgo, based on r522817c) clang version 18.0.3 (https://android.googlesource.com/toolchain/llvm-project d8003a456d14a3deb8054cdaa529ffbf02d9b262) configuration: --arch=aarch64 --as=aarch64-linux-android-clang --cc=aarch64-linux-android-clang --cxx=aarch64-linux-android-clang++ --nm=llvm-nm --ar=llvm-ar --ranlib=llvm-ranlib --pkg-config=/home/builder/.termux-build/_cache/android-r27c-api-24-v1/bin/pkg-config --strip=llvm-strip --cross-prefix=aarch64-linux-android- --disable-indevs --disable-outdevs --enable-indev=lavfi --disable-static --disable-symver --enable-cross-compile --enable-gnutls --enable-gpl --enable-version3 --enable-jni --enable-lcms2 --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libharfbuzz --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenmpt --enable-libopus --enable-librav1e --enable-librubberband --enable-libsoxr --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-mediacodec --enable-opencl --enable-shared --prefix=/data/data/com.termux/files/usr --target-os=android --extra-libs=-landroid-glob --disable-vulkan --enable-neon --disable-libfdk-aac libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.100 / 61. 19.100 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100 libpostproc 58. 3.100 / 58. 3.100 Devices: D. = Demuxing supported .E = Muxing supported --- D lavfi Libavfilter virtual input device