Problems building WebRTC native code for Android with ffmpeg H264 Software Video Decoder

[baayal_dev]

Now i know that the H264 ffmpeg Decoder is not officially supported on the Android platform but still i am trying to get it working so bear with me please.

I am working with the example AppRTC Application and i have already created the necessary JNI API for creating the
ffmpeg decoder from the Java code. I have also set the necessary flags for compiling and including the ffmpeg library.
Flags i have set:

-target_os="android"

-target_cpu="arm"
-rtc_use_h264=true
-ffmpeg_branding="Chrome"
-use_openh264=true
-proprietary_codecs=true


I have also modified the ffmpeg_generated.ini to include the same source files as the linux configuration.

But when finally running the application and connecting to a client it tries to create the decoder but fails 
with this error: 

E/h264_decoder_impl.cc: (line 198): FFmpeg H.264 decoder not found.

I know the error basically means that the library was not build/included correctly but I dont know what else i can do so if someone has an Idea that could help me that would be great.

[李晓帆]

Hi,

1.enable openh264 by set 'rtc_use_h264 = true ffmpeg_branding = "Chrome" '

2.after this you need modify  third_party/ffmpeg/chromium/config/Chrome/android/arm-neon/libavcodec/parser_list.c and third_party/ffmpeg//chromium/config/Chrome/android/arm-neon/libavcodec/codec_list.c files, add h264 parse, like:

--- a/chromium/config/Chrome/android/arm-neon/libavcodec/parser_list.c

+++ b/chromium/config/Chrome/android/arm-neon/libavcodec/parser_list.c

@@ -4,4 +4,5 @@ static const AVCodecParser * const parser_list[] = {

     &ff_mpegaudio_parser,

     &ff_opus_parser,

     &ff_vorbis_parser,

+    &ff_h264_parser,

     NULL };

--- a/chromium/config/Chrome/android/arm-neon/libavcodec/codec_list.c

+++ b/chromium/config/Chrome/android/arm-neon/libavcodec/codec_list.c

@@ -13,4 +13,5 @@ static const AVCodec * const codec_list[] = {

     &ff_pcm_s32le_decoder,

     &ff_pcm_u8_decoder,

     &ff_libopus_decoder,

+    &ff_h264_decoder,

     NULL };

Your error was caused by step 2, if I am correct ^_^

baayal_dev <frok...@gmail.com> 于2019年3月21日周四 下午8:38写道：

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[baayal_dev]

wow thank you ! It works now. have a great day :)

[Xu Yu]

Hi, baayal_dev, I met the same problem, could you please tell me how to implement sw decode H.264 through Java?

I create peerconnection but there is no H264 description in local sdp. Thank u very much~

在 2019年3月21日星期四 UTC+8下午8:38:26，baayal_dev写道：

[hieu...@tamdongtam.vn]

Sorry for my post, becaus I report issue on github but no one care, 
Anyone who deploy apprtc successfully?
I have an Issue that android app cannot connect to my server but chrome is OK, here is log:
https://github.com/webrtc/apprtc/issues/619

I understand some of deploy step, any question with me, welcome!

[Piasy Xu]

Maybe you can try this: https://github.com/Piasy/WebRTC-Docker

在 2019年4月11日星期四 UTC+8下午10:57:38，hieu...@tamdongtam.vn写道：

[Hieu than hieu]

Thank you, I will try this.

 

Sent from Mail for Windows 10

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[Xu Yu]

Hi, baayal_dev, I met same problem with you, could you please tell me how to implement sw decode H.264 through Java ?

I create peerconnection but there is no H264 description in local sdp. Thank u very much~

在 2019年3月21日星期四 UTC+8下午8:38:26，baayal_dev写道：

Now i know that the H264 ffmpeg Decoder is not officially supported on the Android platform but still i am trying to get it working so bear with me please.

[Rohit N]

That was highly specific answer to a highly specific question! Thanks a lot! Saved me a lot of hours!  

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