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• Send H.264 encoded stream through RTMP using FFmpeg

  15 novembre 2016, par Galaxy

  I followed this to encode a sequences images to h.264 video.

  Here is outputting part of my code :

  int srcstride = outwidth*4;
  
  sws_scale(convertCtx, src_data, &srcstride, 0, outheight, pic_in.img.plane, pic_in.img.i_stride);
  
  x264_nal_t* nals;
  
  int i_nals;
  
  int frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
  
  if (frame_size) {
  
      fwrite(nals[0].p_payload, frame_size, 1, fp);
  
  }

  This is in a loop to process frames and write them into a file.

  Now, I’m trying to stream these encoded frames through RTMP. As I know, the container for the RTMP is FLV. So I used command line as a trial :

  ffmpeg -i test.h264 -vcodec copy -f flv rtmp://localhost:1935/hls/test

  This one works well as streaming a h.264 encoded video file.

  But how can I implement it as C++ code and stream the frames at the same time when they are generated, just like what I did to stream my Facetime camera.

  ffmpeg -f avfoundation -pix_fmt uyvy422  -video_size 1280x720 -framerate 30 -i "1:0" -pix_fmt yuv420p -vcodec libx264 -preset veryfast -acodec libvo_aacenc -f flv -framerate 30 rtmp://localhost:1935/hls/test

  This may be a common and practical topic. But I’m stuck here for days, really need some relevant exprience. Thank you !

• Send H.264 encoded stream through RTMP using FFmpeg

  15 novembre 2016, par Galaxy

  I followed this to encode a sequences images to h.264 video.

  Here is outputting part of my code :

  int srcstride = outwidth*4;
  
  sws_scale(convertCtx, src_data, &srcstride, 0, outheight, pic_in.img.plane, pic_in.img.i_stride);
  
  x264_nal_t* nals;
  
  int i_nals;
  
  int frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
  
  if (frame_size) {
  
      fwrite(nals[0].p_payload, frame_size, 1, fp);
  
  }

  This is in a loop to process frames and write them into a file.

  Now, I’m trying to stream these encoded frames through RTMP. As I know, the container for the RTMP is FLV. So I used command line as a trial :

  ffmpeg -i test.h264 -vcodec copy -f flv rtmp://localhost:1935/hls/test

  This one works well as streaming a h.264 encoded video file.

  But how can I implement it as C++ code and stream the frames at the same time when they are generated, just like what I did to stream my Facetime camera.

  ffmpeg -f avfoundation -pix_fmt uyvy422  -video_size 1280x720 -framerate 30 -i "1:0" -pix_fmt yuv420p -vcodec libx264 -preset veryfast -acodec libvo_aacenc -f flv -framerate 30 rtmp://localhost:1935/hls/test

  This may be a common and practical topic. But I’m stuck here for days, really need some relevant exprience. Thank you !

• How to generate an MP4 for use with Media Source Extensions using ffmpeg ?

  21 novembre 2014, par Pablo Montilla

  I’m using ffmpeg to generate a fragmented mp4 stream that will be consumed by an HTML5 player using MSE. I think I have a correctly formatted mp4 stream of data with an empty moov at the start and a series of moof+mdat for the video fragments. What I’m stuck is with the codec that’s being received by Chrome.

  chrome ://media-internals has this to say :

  00:00:00 00 pipeline_state  kCreated
  
  00:00:00 00 EVENT           PIPELINE_CREATED
  
  00:00:00 00 EVENT           WEBMEDIAPLAYER_CREATED
  
  00:00:00 00 url             blob:http%3A//localhost/3388b7f1-5567-4d76-a585-0b247affd16a
  
  00:00:00 00 pipeline_state  kInitDemuxer
  
  00:00:07 68 error           Video codec: avc1.4d401e

  From which I gather the problem is with the encoded data, which should be in avc1.4d0020 as its specified in the javascript.

  I’ve seen the answer to html5 video tag codecs attribute, which tells me I need to reset profile_compatibility and AVCLevelIndication, but I couldn’t find an option to do that.

  Here’s the command line I’m using (the pipe is read and sent to the web page using web sockets) :

  ffmpeg -re -i Input.mp4 -map 0:0 -y -c:v libx264 -preset veryslow -x264opts intra-refresh=1 -tune psnr -refs 1 -b:v 1500k -bf 0 -g 8 -b-pyramid none -f mp4 -movflags empty_moov+omit_tfhd_offset+frag_keyframe -frag_duration 1000000 -profile:v main -iods_video_profile 0 -flags +loop \\.\pipe\FeedPipe