Posts by nvdias

    For LE9 i use the "Raspberry Pi VNC" addon ( which uses dispmanx)

    But as referred by CvH, VNC stopped working in LE10.

    A side note: In Raspberry Official OS, Real VNC works fine, don't know if it is possible to port it to LE10 ....

    well ... I don't know in fact what to say...

    I understand the difficulties and the need to wait.

    I will probably continue with 9.2.8 in my main RPI4 andm and keep LE10 in the RPI4 testing.

    For movie watching, netflix, tv series, LE10 is just great.

    But for live TV, I've tried to disable DRM PRIME and force (software) deinterlacing, but

    but unless I'm doing something wrong, it is not watcheable

    there's an obvious lag, and probably the RPI4 is not able do do software deinterlacing with 1080i @ 50hz live tv.

    Any sugestions / tweaks ?

    I've been using this pack for a while. small, simple, without external dependencies or versions.

    It does the job.

    A great compliment for tvheadend on-the-fly transcoding.

    With a transcoding web interface.

    ffmpeg and nginx compiled with the more recent official sources.

    Though it was a good idea to share it with the community.

    You are free to use (or not).



    This addon is more than ffmpeg:

    It is a full transcode server with a ready to use configuration and user interface to help you serve your local content to an external device (example: stream from your pi --> ipad on the run).

    It includes ffmpeg and nginx in order to have everything together in just one add-on without external dependencies.

    isn't the included ffmpegx (ffpge-tools) already compiled with everything that it works with rpi transcode ?

    For what I've seen in the past, omx and mmal weren't included.

    Pi Foundation folks are currently focussed on finishing the 10/12-bit video and 4K60 work. This will firm up the kernel/DRM side of the puzzle and allow some ffmpeg cleanup, which needs to happen before more complication (with deinterlace) is added. It's vacation season so all of the above is running about 3/4 speed right now. IMHO the current software deinterlace capability is quite usable (not perfect, but usable).

    Yes. it is of course acceptable to wait for deinterlacing,

    But in my opinion and taste, the software deinterlace with RPi4 is not a good viewing experience.

    At least for TV Reception of full-hd [email protected] fps soccer games - there's a movement lag that feels somehow "unnatural". And gives an uncomfortable viewing sensation (probably the RPi4 is not powerful enough to do software deinterlace).

    But that's only my opinion, of course.

    when deinterlace is not needed LE10 is great ;)



    I've mounted a transcoding server with a simple web control interface to help viewing your videos in a compatible web browser.

    It includes ffmpeg own compilation ready to do real time transcode in rpi 3 and rpi 4 using omx and mmal.

    It also works great spawned by tvheadend

    Also includes nginx specific compile to help the transcoding process.

    You can even add nginx additional configurations.

    add-on will be identified as service.ffmpeg in kodi.

    Download here:…_rFJARjn23rKJNsOLoWQMI_Hw


    FFmpeg TRANSCODING Server for Raspberry Pi

    This add-on includes:

    1 ffmpeg with omx and mmal support for Pi, and also libx264 with presets (for fast transcoding).

    can be used in a tvheadend profile (see bellow).

    2 nginx with rtmp and hls for transcoding services.

    nginx can also publish your custom sites.

    3 A small transcoding web based service - you can transcode your local stored movies across the network.

    even when on low bandwidth.

    Compatible with vlc player and chrome (must install a m3u8 extension for playing streams).


    After install go to add-on settings in kodi:

    - Change user and pass (defaults to user / pass)

    Access to the User interface with a web-browser:


    in which path_to_transcode is the directory path that contains video contents to be browsed and transcoded.

    use linux format (example: /media/hdd/movies)


    1 FFmpeg

    ffmpeg is used as the encoding for the server,

    but it is also usable trought command-line.

    just call as:



    If you use tvheadend, you may define a profile that pipes video streams trough ffmpeg before delivering.

    The following example uses x264 to live transocde with a Rapsberry Pi4.

    Assuming ffmpeg server kodi add-on installed in LibreELEC:

    - tvheadend / configuration / stream / stream profiles / add

    - create and enable new stream profiles with the followig:

    . enabled = true

    . Data timeout = 0

    . Restart on error = true

    . Continue if descrambling fails = true

    . Descrambling timeout = 10000

    . Command Line

    /storage/.kodi/addons/service.ffmpeg/bin/ffmpeg -loglevel quiet -i pipe:0 -vcodec libx264 -preset faster -s 640x480 -vb 512k -bufsize 1024k -g 100 -af "aresample=async=1:first_pts=0" -acodec aac -ab 128k -f mpegts pipe:1

    . Kill signal = SIGTERM

    . Kill timeout = 15

    - The ffmpeg provided command will do live transcode with the major setup:

    . video codec : libx264

    . preset : faster

    . frame size : 640x480

    . video bitrate : 512k

    . audio codec : aac

    . audio bitrate : 128k

    . audio sync with video (to handle received lost frames)


    As nginx is being used, you can define additional servers in:


    Or by samba as:



    - TRANSCODING CONTROL PORT : Defaults to 9996.

    Simple CTRL GUI : http://ip:port/cgi-bin/movies.cgi

    Start Transcode : http://ip:port/cgi-bin/transcode.cgi

    Stop Transcode : http://ip:port/cgi-bin/stop-transcode.cgi

    Play stream : http://ip:port/hls/movie.m3u8

    Movies will default transcode to 640x480 @ 512kbps.

    Publishing is made to rtmp://localhost/hls/movie (internal port 1935)


    User and password defaults to "user" and "pass".

    Should be changed in kodi's add-on configuration screen.


    In the add-on configuration screen, you can define:

    - Server port (defaults to 9996);

    - Transcoded streaming video frame size (defaults to 640 x 480);

    - Transcoded streaming video bitrate (defaults to 512 Kbps);

    - User and password to access the control site;

    - Control GUI:

    Should be called with the local server directory with movies to transcode.



    This interface allows choosing the movie, start transcoding, start playback and stop transcoding.

    m3u8 can be watched in chrome by installing an extension. VLC Plays them directly.


    transcode.cgi can be called directly by giving the movie FULL PATH NAME WITHIN THE SERVER,

    and several optional arguments.

    The example bellow uses the default options:


    All arguments are self explanatory, except "caller",

    which is an optional address to transfer execution after the transcoding is started.

    If "caller" is not passed as argument,

    transcode.cgi will stay in browser with a small simple interface to playback and stop the stream.


    ffmpeg and nginx were compiled using the following flags:

    ffmpeg version N-103035 Copyright (c) 2000-2021 the FFmpeg developers

    built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516


    --prefix=/usr --enable-gpl --enable-libx264

    --enable-omx --enable-omx-rpi --enable-mmal --disable-ffplay

    --disable-ffprobe --disable-doc --disable-libxcb --disable-libxcb-shm

    --disable-libxcb-xfixes --disable-libxcb-shape

    --enable-libx265 --enable-openssl --enable-nonfree

    nginx version: nginx/1.21.1

    built by gcc 6.3.0 20170516 (Raspbian 6.3.0-18+rpi1+deb9u1)

    built with OpenSSL 1.1.0l 10 Sep 2019

    TLS SNI support enabled

    configure arguments:

    --add-module=../nginx-rtmp-module --with-http_ssl_module

    --with-http_dav_module --with-http_flv_module --with-http_mp4_module

    --with-http_gunzip_module --with-http_gzip_static_module


    I'm not using it either!

    It simply comes with every release from the past weeks,, but my rpi4 simply crashes at boot if I have it selected.

    I have to manualy disable it, placing the sc-card in my pc and manually editing distroconfig.txt.

    Is cma-512 needed ?

    could it be possible to NOT being enabled by default ?


    I've lost some hours to understand why my RPi4 started to crash at boot after installing newer le10 nightly builds.

    After some tests I've noticed that the line in distroconfig.txt:


    Is the one to blame.

    If I remove cma-512 from distroconfig.txt, Le10 works just fine.

    I have a RPi4 with 4 GB RAM.

    What could be happening ? (the previous le10 builds did not had cma-512 and also worked ok).

    No one else had the same problem ?

    Thanks :)

    SNR 28 db

    strenght -78 dBm

    Well ... assuming those are DVB-C signals, I will suggest you to try a different connection.

    do you have a way to connect to 1 of the first cable wall plugs ?

    Or even directly in the cable that enters your home ?

    (just to make sure you are not getting a big signal drop in your home cabling, and assure that that is not the reason for your breaks)

    Further testing and it looks like issue is with my streams and even recordings...ffmpeg is showing many errors while transcoding both live tv and recordings..strange thing is these corrupt segments are not teally visible when watching live tv and not even on reception is a bit on the low side tough..about 43%..

    Have you've been successful meanwhile ?

    When you say 43%, can you report the SNR ? (in tvheadend's interface, status/stream).

    For your reference, in average I have:
    cable - SNR 36.3 dBm ; Signal strength 51.0 dBm.
    sat - SNR 15. dBm ; -30.5 dBm.

    Using a TBS 5520 SE combo receiver.

    About your error:

    is strange, I use libreelec 9.2.6 and my ffmpeg works ok. is in /usr/lib/

    Have you tried executing ffmpeg from a ssh shell ?

    About clients:

    I do my tests with vlc in PC to connect to tvheadend in my Rpi trough a m3u list got from http://tvheadend_ip_address:9981/playlist/channels

    This transcoding, takes some seconds to start, after starting 5 to 10s after it stops for 2 seconds (buffering), but then it plays all the time without issues, providing I have a good network connection. of course.

    There is also a nice free tvheadend client for iOS devices that works great, and it is easy to select a codec profile from it.

    This is very strange.

    I use the exact same approach with a RPi3 and a RPi4, but I have none of those issues.

    As I've posted in another thread, this is my ffmpeg command line,

    /storage/.kodi/addons/service.ffmpeg/bin/ffmpeg -loglevel quiet -i pipe:0 -vf scale=640:360 -vcodec h264_omx -vb 512k -bufsize 2048k -g 100 -af "aresample=async=1:first_pts=0" -acodec aac -ab 128k -f mpegts pipe:1

    The major diferences are that I'm not forcing the frame rate nor the pixel format and I use a different ffmpeg version.

    I use a ffmpeg version compiled directly in my RPi3 from the official ffmpeg sources.

    If you want to test with it, just download from this link:…qANOIuTPIUIAtSfNVEoInPmL8

    Install the add-on directly from libreelec's kodi interface.

    ffmpeg path is:


    Note: Also take a look into gpu_mem in /flash/config.txt (i'm using 256 in my RPi3, and 512 imnRPi4)

    Note: It is a personal add-on that I've not yet released, which includes ffmpeg to help nginx to serve as a transcode server

    (if you are interested in knowing more, just read the txt file inside the add-on, or take a look at http://RPi_ip_address:9996/cgi-bin/movies.cgi?/storage after install - user/pass)

    Another thing: What client are you using to test the stream ?

    Gonna try your have some code I never tryed before..

    what is this for?

    -g 100 -af "aresample=async=1:first_pts=0"

    Still stopping on my setup..max it plays is 10 minutes...are you using FFMPEG addon from Libreelec repo?

    Your 10 mins, might be a memory problem.

    I am not using ffmpeg from libreelec. I've made a ffmpeg compilation with omx serving nginx server for live web transcoding of recordings - I might share it in the forum but I do not believe that is the issue.

    -g 100 is the GOP length. 100 is recommended for mpeg streams.

    -af "aresample=async=1:first_pts=0", helps audio resampling when there are interruptions in tv reception and solving audio de-syncs.

    -bufsize 2048k increases the buffer size to help again handling interruptions in reception.

    These had been very helpfull for me in receiving steady streams.

    • For your tests I suggest you use an unencrypted channel.
    • Also confirm you have a good cable connection (of course).
    • And depending in your device, as I have a Raspberry Pi4 with 4GB, I have dedicated 512 KB to the GPU, which has been helpfull in timeshift buffering and fast-forward and rewiding recordings (gpu_mem=512 in /flash/config.txt)
    • About timeshift, i only use RAM for timeshift, never disk, which also increases stability, as less disk access when watching tv.