Commits on Nov 16, 2021

1. SrsEncoder video reconfigure on fly …

   If you reset MediaCodec in the middle of the stream, then the video  freezes (artifacts) in the players. After the experiments, I seem to understand what the reason is. Not all  predicred frames have time to be sent to the stream (the encoder stops). Therefore, first we complete the sending of all P-frames (this is signaled by the MediaCodec.BUFFER_FLAG_KEY_FRAME), then we reconfigure the encoder with new parameters.
   
   Tested in latest Chrome and FF. The video now changes format and continues to play
   
   Perhaps you will have other thoughts about this. Please give comments
   
   ChunkDemuxer
   Selected FFmpegAudioDecoder for audio decoding, config: codec: aac, profile: unknown, bytes_per_channel: 2, channel_layout: STEREO, channels: 2, samples_per_second: 44100, sample_format: Signed 16-bit, bytes_per_frame: 4, seek_preroll: 0us, codec_delay: 0, has extra data: false, encryption scheme: Unencrypted, discard decoder delay: false, target_output_channel_layout: STEREO, has aac extra data: true
   Video rendering in low delay mode.
   Failed to initialize DecryptingVideoDecoder
   Effective playback rate changed from 0 to 1
   Starting Initialization of DXVAVDA
   Using D3D9 device for DXVA
   Selected VDAVideoDecoder for video decoding, config: codec: h264, profile: h264 baseline, level: not available, alpha_mode: is_opaque, coded size: [480,640], visible rect: [0,0,480,640], natural size: [480,640], has extra data: false, encryption scheme: Unencrypted, rotation: 0°, flipped: 0, color space: {primaries:BT709, transfer:BT709, matrix:BT709, range:LIMITED}
   video decoder config changed midstream, new config: codec: h264, profile: h264 baseline, level: not available, alpha_mode: is_opaque, coded size: [1080,1920], visible rect: [0,0,1080,1920], natural size: [1080,1920], has extra data: false, encryption scheme: Unencrypted, rotation: 0°, flipped: 0, color space: {primaries:BT709, transfer:BT709, matrix:BT709, range:LIMITED}
   Failed to initialize VDAVideoDecoder
   Failed to initialize DecryptingVideoDecoder
   Failed to initialize VDAVideoDecoder
   Failed to initialize VpxVideoDecoder
   Failed to initialize Dav1dVideoDecoder
   Selected FFmpegVideoDecoder for video decoding, config: codec: h264, profile: h264 baseline, level: not available, alpha_mode: is_opaque, coded size: [1080,1920], visible rect: [0,0,1080,1920], natural size: [1080,1920], has extra data: false, encryption scheme: Unencrypted, rotation: 0°, flipped: 0, color space: {primaries:BT709, transfer:BT709, matrix:BT709, range:LIMITED}

   

   thegobot committed Nov 16, 2021
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