Skip to content

nvh264enc : "Requested stream size is larger than the maximum configured size" when encoding a stream who's resolution has increased.

I'm trying to real-time encode an application output into a video stream using the following pipeline in nodejs.

    const pipeline = new gstreamer.Pipeline(
      // scale & convert to RGBA
      `appsrc name=source caps=video/x-raw,format=${gstBufferFormat},width=${width},height=${height},framerate=60/1 ! 
      
      tee name=t ! queue ! 
      glupload ! 
      glcolorconvert ! 
      glshader fragment="
        #version 120
        #ifdef GL_ES
        precision mediump float;
        #endif
        varying vec2 v_texcoord;
        uniform sampler2D tex;
        uniform float time;
        uniform float width;
        uniform float height;

        void main () {
          vec4 pix = texture2D(tex, v_texcoord);
          gl_FragColor = vec4(pix.a,pix.a,pix.a,0);
        }
      " 
      vertex = "
        #version 120
        #ifdef GL_ES
        precision mediump float;
        #endif
        attribute vec4 a_position;
        attribute vec2 a_texcoord;
        varying vec2 v_texcoord;
        
        void main() {
          gl_Position = a_position;
          v_texcoord = a_texcoord;
      }
      " ! 
      glcolorconvert ! video/x-raw(memory:GLMemory),format=NV12 ! 
      nvh264enc gop-size=-1 qp-max=32 preset=low-latency-hp rc-mode=constqp ! 
      video/x-h264,profile=baseline,stream-format=byte-stream,alignment=au,framerate=60/1 ! 
      appsink name=alphasink 
      
      t. ! queue ! 
      glupload ! 
      glcolorconvert ! video/x-raw(memory:GLMemory),format=NV12 ! 
      nvh264enc gop-size=-1 qp-max=32 preset=low-latency-hp rc-mode=constqp ! 
      video/x-h264,profile=baseline,stream-format=byte-stream,alignment=au,framerate=60/1 ! 
      appsink name=sink`
    )

When the application is resized (enlarged), I update the caps of the appsrc input element in the pipeline.

this._src.caps = `video/x-raw,format=${gstBufferFormat},width=${width},height=${height},framerate=60/1`

However I am greeted with this error, after which all encoding stops.

app-endpoint-server_1  | 0:00:10.365270221    26      0x40aee80 WARN                   nvenc gstnvbaseenc.c:1173:gst_nv_base_enc_set_format:<enc> error: Requested stream size is larger than the maximum configured size
app-endpoint-server_1  | 0:00:10.365384370    26      0x40aee80 WARN            videoencoder gstvideoencoder.c:685:gst_video_encoder_setcaps:<enc> rejected caps video/x-raw(memory:GLMemory), format=(string)NV12, width=(int)853, height=(int)699, framerate=(fraction)60/1, interlace-mode=(string)progressive, texture-target=(string)2D
app-endpoint-server_1  | 0:00:10.365513626    26      0x40aee80 WARN                   nvenc gstnvbaseenc.c:1173:gst_nv_base_enc_set_format:<enc> error: Requested stream size is larger than the maximum configured size
app-endpoint-server_1  | 0:00:10.365561478    26      0x40aee80 WARN            videoencoder gstvideoencoder.c:685:gst_video_encoder_setcaps:<enc> rejected caps video/x-raw(memory:GLMemory), format=(string)NV12, width=(int)853, height=(int)699, framerate=(fraction)60/1, interlace-mode=(string)progressive, texture-target=(string)2D
app-endpoint-server_1  | 0:00:10.365593936    26      0x40aee80 WARN                GST_PADS gstpad.c:4230:gst_pad_peer_query:<capsfilter2:src> could not send sticky events

Using the x264enc this pipeline works just fine. What's going on? Am I doing something wrong and/or how can I work around this error?

Edited by Matthew Waters