FFmpeg, ffplayer; No sounds with game Katrain

Anthony_Craig · 16 November 2023 01:12

Hi. When I play the game Katrain, I have no sounds of stones being placed on the board. I have had this issue since the upgrade to Jammy and have posted to Discord a long time before this post. I found the following article on this website discussing how to install FFmpeg and libavcodec; Synaptic says that package of libavcodec-extra and libavcodec-extra58 will be removed if I try to install libavcodec58. The libavcodec58 seems to be precursers to the other two packages. On this machine, there are no other sound issues, other than sometimes having to open the PulseAudio Volume Control because I have sound through the hdmi rather than internal. So I want to be careful not to mess the machine up when it is good.

I took the following screenshot of the error reported by the terminal when Katrain was supposed to have sounds.

This article I found on this site I was thinking that I don't need to follow the steps because I already have ffmpeg installed (see Synaptic screenshot) and if I try to add libavcodec-58, then the other *-extra58 and *-extra will be removed.

I installed Katrain with Kivy--my last post was about solving the installation problem for the game using the command of kivy.
Does anyone have any ideas for me? The terminal says patches would be welcome, but I don't want to uninstall packages that may be needed; as I said, everything else is good.

tkn · 16 November 2023 14:02

It is a bug in katrain/kivy, according to this page

I am getting the same on linux, as well as font problems in Korean. Unfortunately this is a case of kivy shipping with unstable/misconfigured backends and then blaming said backends.
e.g. kivy/kivy#6601 kivy/kivy#6512
KIVY_AUDIO=[some other backend] as described here: Controlling the environment — Kivy 2.2.1 documentation might work

According to this link, you might have some success with the following instructions:

In case the sound is not working, or there is no available wheel for your OS or Python version, try building kivy locally using:
pip3 uninstall kivy 
pip3 install kivy --no-binary kivy
You can now start KaTrain by running python3 -m katrain

ironfoot · 17 November 2023 19:03

Your program log suggests that error is coming from ffpyplayer module.

github.com/matham/ffpyplayer

Audio thread error for version >= 4.4: Channel layout change is not supported

opened 09:10AM - 02 Aug 23 UTC

blsqr

Hi there, and first of all thanks for ffpyplayer! It's very powerful to have …these bindings :) I noticed an issue with the latest version (4.5) of ffpyplayer relating to playing the audio streams from _certain_ video files: When starting to play the video, no audio can be heard and the following error is logged: ``` [ffpyplayer_abuffersink @ 0x600003f30210] Channel layout change is not supported Audio thread error: Not yet implemented in FFmpeg, patches welcome ``` As hinted upon in [this reddit thread](https://www.reddit.com/r/kivy/comments/13x8p4y/ubuntu_audio_problems/), downgrading to 4.3.5 indeed helped: The audio plays as expected, emitting only the following log message in place of the one above: ``` [ffpyplayer_abuffersink @ 0x600002fe8790] Removing channel layout 0x3, redundant with 2 channels ``` The video plays fine via `ffplay`, including audio, so I would have expected ffpyplayer to also play it without issues. Is there something between v4.3.5 and 4.5 that might have caused this error? Was this a deliberate change? I don't know the codebase really, but I'm happy to dive into this, if it helps. --- Python 3.10.12, macOS 13.4.1 ```python ffpyplayer.player.MediaPlayer( video_url, lib_opts={}, ff_opts=dict(sync="audio", ss=0, infbuf=True), ) ``` ``` $ ffprobe video.mp4 ffprobe version 6.0 Copyright (c) 2007-2023 the FFmpeg developers built with Apple clang version 14.0.3 (clang-1403.0.22.14.1) configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon libavutil 58. 2.100 / 58. 2.100 libavcodec 60. 3.100 / 60. 3.100 libavformat 60. 3.100 / 60. 3.100 libavdevice 60. 1.100 / 60. 1.100 libavfilter 9. 3.100 / 9. 3.100 libswscale 7. 1.100 / 7. 1.100 libswresample 4. 10.100 / 4. 10.100 libpostproc 57. 1.100 / 57. 1.100 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x13c804ae0] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1000 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x13c804ae0] st: 0 edit list 1 Cannot find an index entry before timestamp: 1000. Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4': Metadata: major_brand : XAVC minor_version : 16785407 compatible_brands: XAVCmp42iso2 creation_time : 2023-05-16T22:35:07.000000Z Duration: 00:02:23.04, start: 0.000000, bitrate: 98555 kb/s Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4, progressive), 3840x2160 [SAR 1:1 DAR 16:9], 96812 kb/s, 25 fps, 25 tbr, 25k tbn (default) Metadata: creation_time : 2023-05-16T22:35:07.000000Z handler_name : Video Media Handler vendor_id : [0][0][0][0] encoder : AVC Coding Stream #0:1[0x2](und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, 2 channels, s16, 1536 kb/s (default) Metadata: creation_time : 2023-05-16T22:35:07.000000Z handler_name : Sound Media Handler vendor_id : [0][0][0][0] Stream #0:2[0x3](und): Data: none (rtmd / 0x646D7472), 204 kb/s (default) Metadata: creation_time : 2023-05-16T22:35:07.000000Z handler_name : Timed Metadata Media Handler timecode : 14:54:11:01 Unsupported codec with id 0 for input stream 2 ```

The solution at the moment is to rollback ffpyplayer to version 4.3.5 :
pip3 install 'ffpyplayer==4.3.5' --force-reinstall

As a side note, installing Python packages globally using pip3 is not recommended. You shall study a concept of virtual environment in Python and install your Python packages inside virtual environment(s).

Anthony_Craig · 20 November 2023 22:56

Hi. When I try the pip3 command to install ffplayer 4.3.5, I get this error.

My online searches always pull up ffmpeg. I tried Synaptic, but there was no ffplayer package.

mendy · 20 November 2023 23:11

your screenshot seems to be missing the py in @ironfoot 's command

pip3 install 'ffpyplayer==4.3.5' --force-reinstall

mendy · 30 November 2023 14:46

Glad it worked but the solution to your question was provided by @ironfoot.
Not sure how to change it, maybe if solution arrows show up in post click on it under the correct solution. That's why it is best to copy the posted command to eliminate errors. Changing accepted solution is doable and should go to the one providing the solution.

Anthony_Craig · 30 November 2023 16:14

Hi mendy. Thanks for the error-catching. I will copy-and-paste from now on. I don't think I marked a solution when I saw your post about the miss appearing--I only marked a solution when browsing this site yesterday and looking for topics of mine that didn't have a solution marked. I will try to mark as solution ironfoot's post. Thanks again.