[vlc-devel] [Android] Hi, I'm not from the vlc team, but I really appreciate your help with writing a module to vlc

[Dafna Hirschfeld]

Hi,

I was able to solve the problem.

I added my custom file extension to *vlc-android/AndroidManifest.xml*
But I found out that I also have to add it to the array *videoExtensions* in
the file *libvlc/src/org/videolan/libvlc/util/Extensions.java *

Dafna



On Thu, Aug 17, 2017 at 2:56 AM, Dafna Hirschfeld <dafna3 at gmail.com> wrote:

> Hi,
> I write a video decoder module for vlc on android.
> The decoder is for a custom encoding format that I developed myself.
> The files with my encoding are mp4 , but they I have a custom fourcc (say
> "abcd" ) and a different file extension.
>
> When I click the file from the app, the app does not play it , instead
> there is the vlc icon rulling around. looking at the logs, I see:
>
> [*b84a40f8/58c6] mp4 demux: ISO Media (isom) version 512.*
> *[b84a40f8/58c6] mp4 demux: found 1 tracks*
> *[b84a40f8/58c6] mp4 demux: elst box found*
> *[b84a40f8/58c6] mp4 demux:    - [0] duration=33ms media time=-1ms)
> rate=1.0*
> *[b84a40f8/58c6] mp4 demux:    - [1] duration=19253ms media time=0ms)
> rate=1.0*
> *[b84a40f8/58c6] mp4 demux: track[Id 0x1] read 3 chunk*
> *[b84a40f8/58c6] mp4 demux: STTS table of 2 entries*
> *[b84a40f8/58c6] mp4 demux: track[Id 0x1] read 578 samples length:19s*
> *[b84a40f8/58c6] essetup demux: Unrecognized FourCC abcd*
> *[b87af180/58c6] core input: selecting program id=0*
> *[b84a40f8/58c6] mp4 demux: adding track[Id 0x1] video (enable) language
> undef*
> *[b84a40f8/58c6] core demux: using demux module "mp4"*
> *[b87af180/58c6] core input: looking for a subtitle file in
> /storage/emulated/0/*
> *[b87af180/58c6] core input: video is disabled, not selecting ES 0x0*
> *[b8685fd0/58c6] core demux meta: looking for meta reader module matching
> "any": 2 candidates*
> *[b8685fd0/58c6] lua demux meta: Trying Lua scripts in
> /data/user/0/org.videolan.vlc.debug/app_vlc/.share/lua/meta/reader*
> *[b8685fd0/58c6] lua demux meta: Trying Lua playlist script
> /data/user/0/org.videolan.vlc.debug/app_vlc/.share/lua/meta/reader/filename.lua*
> *[b8685fd0/58c6] lua demux meta: Trying Lua scripts in
> /system/usr/share/lua/meta/reader*
> *[b8685fd0/58c6] core demux meta: no meta reader modules matched*
> *[b87af180/58c6] core input:
> `file:///storage/emulated/0/pinwheel_abcd_fourcc.abcd' successfully opened*
> *[b87af180/58c6] core input: EOF reached*
> *[b84a40f8/58c6] core demux: removing module "mp4"*
>
>
> the red line seems to indicate the problem, looking at the code, this log
> comes from the function *static void EsSelect( es_out_t *out, es_out_id_t
> *es )* in the file *vlc/src/input/es_out.c*
> and the code is:
>
> *if( es->fmt.i_cat == VIDEO_ES || es->fmt.i_cat == SPU_ES )*
> *        {*
> *            if( !var_GetBool( p_input, b_sout ? "sout-video" : "video" )
> )*
> *            {*
> *                msg_Dbg( p_input, "video is disabled, not selecting ES
> 0x%x",*
> *                         es->i_id );*
> *                return;*
> *            }*
> *        }*
>
> If I comment out the *return * command, it fixes the problem and the
> video is played with my decoder.
> I added some debug logs and the found out that the *b_sout *is 0 so the *var_GetBool
> * return the value of the *"video" *
>
> the places that I found related to it are:
>
> *vlc/src/input/var.c:436:        var_Create( p_input, "video",
> VLC_VAR_BOOL | VLC_VAR_DOINHERIT );*
> *vlc/src/input/var.c:771:        var_SetBool( p_input, "video", true );*
>
> in more debug prints that I added , the first line sets *"video"* to
> 0x8020
> and the second lines does called.
>
> I'm a bit stuck with that and really appreciate any help.
>
> Thanks a lot
> Dafna Hirschfeld
>
>
>
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