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• Stream to / from FLV

  18 août 2015, par MKN Web Solutions

  Is it possible to stream to an FLV (via exec ffmpeg) and have a client from from that FLV for real time stream (http).

  I’m not sure if this is something of RTMPT, but I’ve seen sites that use FLV to stream. I currently already use HLS and DASH, I’m just trying to experiment with other channels.

• Camera Rendering Buffers and Stutters When Large Video Files Being Processd with FFmpeg

  20 avril 2023, par TIANYU HU

  When rendering a real-time camera, I use ffmpeg to process a large video file(like 4G or even larger) at the same time. I noticed that the video frames are buffering and stuttering.

  


  Pipeline :

  


  DISPLAY=:0 gst-launch-1.0 filesrc location=/home/user/jellyfish-120-mbps-4k-uhd-hevc-10bit.mkv ! matroskademux name=demux demux.video_0 ! queue ! h265parse ! nvv4l2decoder ! nvvidconv ! xvimagesink

  


  FFmpeg command :

  


  ffmpeg -i ${file_name} -c copy -f segment -segment_time 600 -segment_format_options movflags=+faststart -reset_timestamps 1 ./${file_name}_%02d.mp4 -y

  


  And there are some warning indicated that “a lot of buffers are being dropped” duration stuttering.
pipeline warning picture

  


  The requirement can be summarized as “real-time video rendering has higher priority, and the low rate of large file processing is accepted”, are there any possible solutions of this issue from your perspective ? Thanks in advance.

  


• Adaptive bit rate streaming of mp4 of different gop size using media source api

  25 décembre 2018, par wahab khurram

  I want the adaptive bitrate streaming of the mp4 video of different gop keyframe size.

  I know there are couple of options for multi bitrate streaming i.e hls, dash etc

  But I already uploaded the videos on the server each video have the 360p, 480p and 720p mp4 file and each video are having different keyframe intervals.

  So the real challenge is to make the own multi bitrate mp4 media player using the media source api

  I have brain storming all aspect.

  We can only cut the h264 at keyframe

  So my real challenge is to know the video each keyframe, the keyframe chunk duration, the offset duration and the offset byte position in the mp4 file.

  So my question is how I can get these following using ffmpeg, ffprobe or any other software.

  1- Keyframe chunk duration

  2- Offset video duration

  3- Offset byte position in video.

  The following ffprobe command give the detailed info of the each keyframe, maybe this will help

  ffprobe -i "1080p.mp4" -select_streams v -skip_frame nokey -show_frames

  Thanks !