i.MX 95 GStreamer Support: Example Pipelines

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NXP i.MX95

Table of Contents [Sticky]

• Introduction
  • What is i.MX95?
  • Why choosing RidgeRun for your i.MX95 software?
• Carrier Boards
  • Verdin Development Board
    • Yocto Support
      • Setup Yocto Environment
      • Building an image
      • Flashing the Board
      • Getting into the Board
    • Toradex Easy Installer
      • Hardware Setup
      • Installing a pre-built image using GUI
      • Offline Installation of a pre-built image using GUI
      • Re-Installing Toradex Easy Installer
• Torizon OS
  • Overview
  • Installing Torizon OS Pre-Built Image
  • Containers in Torizon OS
  • Torizon Core Builder
  • Customizing an image with Torizon Core Builder
• GStreamer Support
  • Example Pipelines
• Multimedia Support
  • Audio
  • Streaming
    • RTSP Streaming
    • UDP Streaming
  • Video Capture
    • Capture Subsystem
    • Testing Camera Capture
  • Video Processing Unit-VPU
• Neural Processing Unit-NPU
  • eIQ Neutron NPU overview
  • Machine Learning Software Stack
  • Enabling NPU software with Yocto
  • Testing ML demos
• Contact Us

Audio Only Playback

An audio-only playback pipeline looks like the one below. This pipeline reads an ID3 container with MP3 audio file, demux and decodes the audio to finally play it back in the default audio device.

gst-launch-1.0 filesrc location=file_example_MP3_1MG.mp3 ! id3demux ! mpegaudioparse ! mpg123audiodec ! queue ! autoaudiosink

NOTE: For Verdin i.M95 EVK if you want to use the headphones, verify the position of the S3 switch. Check Verdin Audio Switch section.

Video Only Playback

Video-only playback consists of taking a containerized video file and rendering it on the display. 

H.264

This example playback an AVI file container with H.264 encoded video.

 gst-launch-1.0 filesrc location=vid_only_h264.avi ! avidemux ! h264parse ! v4l2h264dec ! queue ! waylandsink

H.265

This example reproduces an MP4 file container with H.265 encoded video.

gst-launch-1.0 filesrc location=vid_only_h265.avi ! avidemux ! h265parse ! v4l2h265dec ! queue ! waylandsink

VPU Downscaling

This example uses VPU to downscale video from 1920x1080 to 720x480, downscaling takes place in the decoder.

Using fakesink:

gst-launch-1.0 filesrc location=video-only-h264.avi ! avidemux ! h264parse ! v4l2h264dec ! video/x-raw,width=720,height=480 ! v4l2h264enc ! h264parse ! waylandsink

Save downscaled version to playable file:

gst-launch-1.0 filesrc location=vid_only_AVI_1920_2_3MG.avi ! avidemux ! h264parse ! v4l2h264dec ! video/x-raw,width=720,height=480 ! v4l2h264enc ! h264parse ! mp4mux ! filesink location=downscaled_720x480.mp4

Audio/Video Playback X

An audio and video playback pipeline looks like the one below. This pipeline reads the MP4 file, demux it, extracting the audio and video stream, decode them and reproduce them on display and audio outputs

gst-launch-1.0 filesrc location=outro_h264_vid_aud.mp4 ! qtdemux name=demux \
demux.video_0 ! queue ! h264parse ! v4l2h264dec ! fakesink \
demux.audio_0 ! queue ! decodebin ! audioconvert ! audioresample ! autoaudiosink

Audio Recording

An audio-only recording pipeline looks like the one below. This pipeline records audio from a audiotestsrc encoded in MP3 format. You can change the encoder to any audio encoder available.

gst-launch-1.0 audiotestsrc ! lamemp3enc ! filesink location=output.mp3

NOTE: For Verdin i.M95 EVK if you want to use the headphones, verify the position of the S3 switch. Check Verdin Audio Switch section.

Video Recording

Video recording examples get a video test pattern, encode and containerize it and save it to a file. The encoder might be H.264 or H.265 as shown below.

H.264

gst-launch-1.0 videotestsrc is-live=true ! video/x-raw,width=1920,height=1080 ! queue ! v4l2h264enc ! h264parse ! queue ! qtmux ! filesink location=output.mp4 -e

H.265

gst-launch-1.0 videotestsrc is-live=true pattern=ball ! video/x-raw,width=1920,height=1080 ! queue ! v4l2h265enc ! h265parse ! queue ! matroskamux ! filesink location=output.mkv

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