RivediLa7: video problem

in our addon RivediLa7 https://github.com/luivit/plugin.video.rivedila7
when you start any video, first runs for one / two seconds, then stops and starts again, from this moment on it works regularly.

In the logfile I read:

11:26:54.047 T:9920  NOTICE: VideoPlayer: Opening: http://la7-vh.akamaihd.net/i/,/content/e...aster.m3u8

11:26:54.047 T:9920 WARNING: CDVDMessageQueue(player):ut MSGQ_NOT_INITIALIZED

11:26:54.264 T:9920   ERROR: DXVA::CProcessorHD::IsFormatSupported: Unsupported format 104 for 1.

11:26:54.264 T:9920   ERROR: DXVA::CProcessorHD::IsFormatSupported: Unsupported format 105 for 1.

11:26:54.264 T:11884  NOTICE: Creating InputStream

11:26:54.372 T:11884  NOTICE: Creating Demuxer

11:26:55.643 T:11884  NOTICE: Opening stream: 3 source: 256

11:26:55.643 T:11884  NOTICE: Creating video codec with codec id: 28

11:26:55.643 T:11884  NOTICE: CDVDVideoCodecFFmpeg::Open() Using codec: H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10

11:26:55.643 T:11884  NOTICE: Creating video thread

11:26:55.643 T:11884  NOTICE: Opening stream: 4 source: 256

11:26:55.643 T:11884  NOTICE: Finding audio codec for: 86018

11:26:55.643 T:7148  NOTICE: running thread: video_thread

11:26:55.644 T:11884  NOTICE: Creating audio thread

11:26:55.644 T:7704  NOTICE: running thread: CVideoPlayerAudio:rocess()

11:26:55.646 T:7148  NOTICE: CDVDVideoCodecFFmpeg::GetFormat - Creating DXVA(720x576)

11:26:55.654 T:7148   ERROR: CDVDVideoCodecFFmpeg:ecode - avcodec_decode_video returned failure

11:26:55.655 T:7704   ERROR: Previous line repeats 2 times.

11:26:55.655 T:7704  NOTICE: Creating audio stream (codec id: 86018, channels: 2, sample rate: 48000, no pass-through)

11:26:55.655 T:7148   ERROR: CDVDVideoCodecFFmpeg:ecode - avcodec_decode_video returned failure

11:26:55.668 T:9920   ERROR: Previous line repeats 12 times.

11:26:55.668 T:9920   ERROR: XFILE::CDirectory::GetDirectory - Error getting plugin://plugin.video.rivedila7/?mode=tutti_programmi&play=http%3a%2f%2fwww.la7.it%2ftgla7%2frivedila7%2ftg-la7-08-04-2018-238610&plot=Informazione%20a%20cura%20della%20redazione%20del%20TG%20LA7.&thumb=http%3a%2f%2fkdam.iltrovatore.it%2fp%2f103%2fsp%2f10300%2fthumbnail%2fentry_id%2f0_bfyndj48%2ftype%2f5%2fwidth%2f600%2fheight%2f360%2fquality%2f100%2fname%2f0_bfyndj48.jpg&titolo=TG%20LA7%5bI%5d%20-%20(Puntata%20del%2008%2f04%2f2018)%5b%2fI%5d

11:26:55.670 T:9920   ERROR: CGUIMediaWindow::GetDirectory(plugin://plugin.video.rivedila7/?mode=tutti_programmi&play=http%3a%2f%2fwww.la7.it%2ftgla7%2frivedila7%2ftg-la7-08-04-2018-238610&plot=Informazione%20a%20cura%20della%20redazione%20del%20TG%20LA7.&thumb=http%3a%2f%2fkdam.iltrovatore.it%2fp%2f103%2fsp%2f10300%2fthumbnail%2fentry_id%2f0_bfyndj48%2ftype%2f5%2fwidth%2f600%2fheight%2f360%2fquality%2f100%2fname%2f0_bfyndj48.jpg&titolo=TG%20LA7%5bI%5d%20-%20(Puntata%20del%2008%2f04%2f2018)%5b%2fI%5d) failed

11:26:55.710 T:9920  NOTICE: D3D: rendering method forced to DXVA processor

11:26:55.710 T:9920  NOTICE: DXVA::CProcessorHD::InitProcessor: Supported deinterlace methods: Blend:yes, Bob:yes, Adaptive:yes, MoComp:no.

11:26:55.711 T:9920 WARNING: CWinRenderer::UpdateVideoFilter - chosen scaling method 1 is not supported by renderer

11:26:56.369 T:7148 WARNING: CRenderManager::WaitForBuffer - timeout waiting for buffer

11:26:56.702 T:7148  NOTICE: CDVDVideoCodecFFmpeg::CDropControl: calculated diff time: 40727