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

qlufo · 2025-01-02T06:17:44.182Z

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

Q

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

make

make

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 ...

T

TomIO•1/2/25, 6:37 AM

If you're trying to build

ffmpeg

ffmpeg

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

ffmpeg

ffmpeg

with

--enable-libxcb

--enable-libxcb

--enable-libxcb

--enable-libxcb.
We do have a

libxb

libxb

libxb

libxb package, so let me make a pull request to enable it on our FFMPEG package.

It looks like

libxcb

libxcb

libxcb

libxcb 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.

Q

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

recordmydesktop

recordmydesktop

recordmydesktop

recordmydesktop 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

T

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.

T

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...

T

TomIO•1/2/25, 7:18 AM

Yep that worked.

T

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.

Q

qlufoOP•1/2/25, 7:55 AM

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

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

T

TomIO•1/2/25, 7:56 AM

What was the command you used for testing?

Q

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?

Q

qlufoOP•1/2/25, 7:58 AM

here you go

ffmpeg -video_size 1280x720 -framerate 20 -f xcbgrab -i :0.0 -f pulse -i default -vf scale=854:480 -c:v h264_v4l2m2m -preset ultrafast -pix_fmt yuv420p -c:a aac -b:a 128k -async 1 "$HOME/Videos/recording_$(date '+%Y-%m-%d_%H-%M-%S').mp4"

ffmpeg -video_size 1280x720 -framerate 20 -f xcbgrab -i :0.0 -f pulse -i default -vf scale=854:480 -c:v h264_v4l2m2m -preset ultrafast -pix_fmt yuv420p -c:a aac -b:a 128k -async 1 "$HOME/Videos/recording_$(date '+%Y-%m-%d_%H-%M-%S').mp4"

ffmpeg -video_size 1280x720 -framerate 20 -f xcbgrab -i :0.0 -f pulse -i default -vf scale=854:480 -c:v h264_v4l2m2m -preset ultrafast -pix_fmt yuv420p -c:a aac -b:a 128k -async 1 "$HOME/Videos/recording_$(date '+%Y-%m-%d_%H-%M-%S').mp4"

ffmpeg -video_size 1280x720 -framerate 20 -f xcbgrab -i :0.0 -f pulse -i default -vf scale=854:480 -c:v h264_v4l2m2m -preset ultrafast -pix_fmt yuv420p -c:a aac -b:a 128k -async 1 "$HOME/Videos/recording_$(date '+%Y-%m-%d_%H-%M-%S').mp4"

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

T

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...

T

TomIO•1/2/25, 7:59 AM

What does

echo $DISPLAY

echo $DISPLAY

echo $DISPLAY

echo $DISPLAY return?

TTomIO What does `echo $DISPLAY` return?

Q

qlufoOP•1/2/25, 8:00 AM

:1

:1

:1

:1

Q

qlufoOP•1/2/25, 8:00 AM

still
even switching it to target

:1

:1

:1

:1

Q

qlufoOP•1/2/25, 8:00 AM

doesn't seem to work

T

TomIO•1/2/25, 8:00 AM

Same error?

Q

qlufoOP•1/2/25, 8:00 AM

spits out the same error...

T

TomIO•1/2/25, 8:01 AM

Oh I think I see the problem.
The input format is called

x11grab

x11grab

x11grab

x11grab not

xcbgrab

xcbgrab

xcbgrab

xcbgrab

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

Q

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

Q

qlufoOP•1/2/25, 8:02 AM

apparently

x11grab

x11grab

x11grab

x11grab is deprecated on newer ffmpeg versions

T

TomIO•1/2/25, 8:03 AM

Not surprising.

Q

qlufoOP•1/2/25, 8:05 AM

is there anything yet that i might've missed?

T

TomIO•1/2/25, 8:05 AM

-c:v h264_v4l2m2m

-c:v h264_v4l2m2m

-c:v h264_v4l2m2m

-c:v h264_v4l2m2m doesn't seem to exist from what I can tell.

Q

qlufoOP•1/2/25, 8:06 AM

ahh

Q

qlufoOP•1/2/25, 8:07 AM

perhaps i should change my script a bit

T

TomIO•1/2/25, 8:07 AM

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

T

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...

Q

qlufoOP•1/2/25, 8:11 AM

Alright
used

libx264

libx264

libx264

libx264
sadly... same error

Q

qlufoOP•1/2/25, 8:11 AM

T

TomIO•1/2/25, 8:11 AM

I'm no FFMPEG wizard unfortunately.

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

Q

qlufoOP•1/2/25, 8:12 AM

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

T

TomIO•1/2/25, 8:14 AM

Here's the example from the FFMPEG documentation.

ffmpeg -f x11grab -framerate 25 -video_size cif -i "$DISPLAY" out.mpg

ffmpeg -f x11grab -framerate 25 -video_size cif -i "$DISPLAY" out.mpg

ffmpeg -f x11grab -framerate 25 -video_size cif -i "$DISPLAY" out.mpg

ffmpeg -f x11grab -framerate 25 -video_size cif -i "$DISPLAY" out.mpg

T

TomIO•1/2/25, 8:14 AM

Does that do anything?

Q

qlufoOP•1/2/25, 8:17 AM

Alright ill try

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

Q

qlufoOP•1/2/25, 8:19 AM

Oof same error

Q

qlufoOP•1/2/25, 8:20 AM

Unknown input format

T

TomIO•1/2/25, 8:23 AM

What's

ffmpeg -devices

ffmpeg -devices

ffmpeg -devices

ffmpeg -devices spit out?

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

Q

qlufoOP•1/2/25, 8:25 AM

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

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

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

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

T

TomIO•1/2/25, 8:25 AM

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

Q

qlufoOP•1/2/25, 8:25 AM

Thats all

T

TomIO•1/2/25, 8:26 AM

That's a whole lot of not much.

TTomIO That's a whole lot of not much.

Q

qlufoOP•1/2/25, 8:26 AM

oh...

T

TomIO•1/2/25, 8:26 AM

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

# [...] compiler options omitted for brevity
Devices:
 D. = Demuxing supported
 .E = Muxing supported
 ---
 DE alsa            ALSA audio output
 DE fbdev           Linux framebuffer
 D  iec61883        libiec61883 (new DV1394) A/V input device
 D  jack            JACK Audio Connection Kit
 D  kmsgrab         KMS screen capture
 D  lavfi           Libavfilter virtual input device
  E opengl          OpenGL output
 DE oss             OSS (Open Sound System) playback
 DE pulse           Pulse audio output
  E sdl,sdl2        SDL2 output device
 DE video4linux2,v4l2 Video4Linux2 output device
 D  x11grab         X11 screen capture, using XCB
  E xv              XV (XVideo) output device

# [...] compiler options omitted for brevity
Devices:
 D. = Demuxing supported
 .E = Muxing supported
 ---
 DE alsa            ALSA audio output
 DE fbdev           Linux framebuffer
 D  iec61883        libiec61883 (new DV1394) A/V input device
 D  jack            JACK Audio Connection Kit
 D  kmsgrab         KMS screen capture
 D  lavfi           Libavfilter virtual input device
  E opengl          OpenGL output
 DE oss             OSS (Open Sound System) playback
 DE pulse           Pulse audio output
  E sdl,sdl2        SDL2 output device
 DE video4linux2,v4l2 Video4Linux2 output device
 D  x11grab         X11 screen capture, using XCB
  E xv              XV (XVideo) output device

# [...] compiler options omitted for brevity
Devices:
 D. = Demuxing supported
 .E = Muxing supported
 ---
 DE alsa            ALSA audio output
 DE fbdev           Linux framebuffer
 D  iec61883        libiec61883 (new DV1394) A/V input device
 D  jack            JACK Audio Connection Kit
 D  kmsgrab         KMS screen capture
 D  lavfi           Libavfilter virtual input device
  E opengl          OpenGL output
 DE oss             OSS (Open Sound System) playback
 DE pulse           Pulse audio output
  E sdl,sdl2        SDL2 output device
 DE video4linux2,v4l2 Video4Linux2 output device
 D  x11grab         X11 screen capture, using XCB
  E xv              XV (XVideo) output device

# [...] compiler options omitted for brevity
Devices:
 D. = Demuxing supported
 .E = Muxing supported
 ---
 DE alsa            ALSA audio output
 DE fbdev           Linux framebuffer
 D  iec61883        libiec61883 (new DV1394) A/V input device
 D  jack            JACK Audio Connection Kit
 D  kmsgrab         KMS screen capture
 D  lavfi           Libavfilter virtual input device
  E opengl          OpenGL output
 DE oss             OSS (Open Sound System) playback
 DE pulse           Pulse audio output
  E sdl,sdl2        SDL2 output device
 DE video4linux2,v4l2 Video4Linux2 output device
 D  x11grab         X11 screen capture, using XCB
  E xv              XV (XVideo) output device

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

Q

qlufoOP•1/2/25, 8:27 AM

Hmm
so what can i do to resolve this?

T

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...

Q

qlufoOP•1/2/25, 8:29 AM

How about your own mobile device? (Termux)

Q

qlufoOP•1/2/25, 8:29 AM

Since you explicitly said your PC one?

T

TomIO•1/2/25, 8:29 AM

Only getting

lavfi

lavfi

lavfi

lavfi on my phone.