Table of Contents
Check for the available Gstreamer elements. #
root@imx8mm-trux-q01:~# gst-inspect-1.0
output:
video4linux2: v4l2src: Video (video4linux2) Source video4linux2: v4l2sink: Video (video4linux2) Sink video4linux2: v4l2radio: Radio (video4linux2) Tuner video4linux2: v4l2deviceprovider (GstDeviceProviderFactory) videoscale: videoscale: Video scaler mpg123: mpg123audiodec: mpg123 mp3 decoder matroska: webmmux: WebM muxer matroska: matroskamux: Matroska muxer matroska: matroskaparse: Matroska parser matroska: matroskademux: Matroska demuxer apetag: apedemux: APE tag demuxer vulkan: vulkanupload: Vulkan Uploader vulkan: vulkansink: Vulkan video sink auparse: auparse: AU audio demuxer uvch264: uvch264src: UVC H264 Source uvch264: uvch264mjpgdemux: UVC H264 MJPG Demuxer monoscope: monoscope: Monoscope flac: flactag: FLAC tagger flac: flacdec: FLAC audio decoder flac: flacenc: FLAC audio encoder equalizer: equalizer-10bands: 10 Band Equalizer equalizer: equalizer-3bands: 3 Band Equalizer equalizer: equalizer-nbands: N Band Equalizer audiomixmatrix: audiomixmatrix: Matrix audio mix segmentclip: videosegmentclip: Video buffer segment clipper segmentclip: audiosegmentclip: Audio buffer segment clipper . . .
The basic elements used for video playback are playbin and filesrc
Testing Video Playback #
We use gst-launch-1.0 to play video from device, following are the commands using playbin and filesrc elements.
1.)
root@imx8mm-trux-q01:~# gst-launch-1.0 playbin uri=file:/home/root/test_video.mp4
output:
Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ====== AIUR: 4.5.5 build on May 22 2020 09:21:03. ====== Core: MPEG4PARSER_06.16.09 build on May 12 2020 06:02:51 file: /usr/lib/imx-mm/parser/lib_mp4_parser_arm_elinux.so.3.2 ------------------------ Track 00 [video_0] Enabled Duration: 0:01:30.000000000 Language: und Mime: video/x-h264, parsed=(boolean)true, alignment=(string)au, stream-format=(string)avc, width=(int)4096, height=(int)2160, framerate=(fraction)24/1, codec_data=(buffer)014d4033ffe10018674d4033e980200021f60 ------------------------ ====== VPUDEC: 4.5.5 build on May 22 2020 09:21:03. ====== wrapper: 3.0.0 (VPUWRAPPER_ARM64_LINUX Build on May 22 2020 09:24:53) vpulib: 1.1.1 firmware: 1.1.1.0 ------------------------ Track 01 [audio_0] Enabled Duration: 0:01:29.954000000 Language: und Mime: audio/mpeg, mpegversion=(int)4, channels=(int)2, rate=(int)44100, bitrate=(int)288952, stream-format=(string)raw, codec_data=(buffer)121056e500 ------------------------ ====== BEEP: 4.5.5 build on May 22 2020 09:21:03. ====== Core: AAC decoder Wrapper build on Dec 7 2017 18:13:51 file: /usr/lib/imx-mm/audio-codec/wrap/lib_aacd_wrap_arm_elinux.so.3 CODEC: BLN_MAD-MMCODECS_AACD_ARM_03.09.00_ARMV8 build on Sep 20 2017 15:02:50. Redistribute latency... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstAudioSinkClock
2.)
root@imx8mm-trux-q01:~# gst-launch-1.0 filesrc location=/home/root/test_video.mp4 typefind=true ! video/quicktime ! aiurdemux ! queue max-size-time=0 ! vpudec ! autovideosink
output:
Setting pipeline to PAUSED ... ====== VPUDEC: 4.5.5 build on May 22 2020 09:21:03. ====== wrapper: 3.0.0 (VPUWRAPPER_ARM64_LINUX Build on May 22 2020 09:24:53) vpulib: 1.1.1 firmware: 1.1.1.0 Pipeline is PREROLLING ... ====== AIUR: 4.5.5 build on May 22 2020 09:21:03. ====== Core: MPEG4PARSER_06.16.09 build on May 12 2020 06:02:51 file: /usr/lib/imx-mm/parser/lib_mp4_parser_arm_elinux.so.3.2 ------------------------ Track 00 [video_0] Enabled Duration: 0:01:30.000000000 Language: und Mime: video/x-h264, parsed=(boolean)true, alignment=(string)au, stream-format=(string)avc, width=(int)4096, height=(int)2160, framerate=(fraction)24/1, codec_data=(buffer)014d4033ffe10018674d4033e980200021f60 ------------------------ ------------------------ Track 01 [audio_0] Enabled Duration: 0:01:29.954000000 Language: und Mime: audio/mpeg, mpegversion=(int)4, channels=(int)2, rate=(int)44100, bitrate=(int)288952, stream-format=(string)raw, codec_data=(buffer)121056e500 ------------------------ Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock
