Play Media in a Web Entity 

Web entities can play a number of different media formats through embedded players.

Supported Media Formats 

Currently, exclusively open source formats are supported:

Container format	Supported codecs	File extension(s)
WebM	Video: VP8, VP9 Audio: Vorbis, Opus	.webm
Matroska	Video: Theora, VP8, VP9 Audio: Vorbis, Opus, FLAC, MP3	.mkv, .mk3d, .mka, .mks
Ogg	Video: Theora, VP8 Audio: Vorbis, Opus, FLAC	.ogg, .oga, .ogv

Video codec	Comments	Supported containers
VP9 (recommended)	Good quality, slow encoding.	WebM, Matroska
VP8	Recommended if your APU has hardware accelerated encoding for VP8, but not VP9. Slightly faster than VP9. Slightly lower quality to compression ratio than VP9.	WebM, Matroska
Theora	Low quality, low compression, outdated.	Matroska

Audio codec	Comments	Supported containers
Opus	Recommended, works well with high and low bitrate.	WebM, Matroska, Ogg
Vorbis	Lower quality to compression ratio than Opus.	WebM, Matroska, Ogg
FLAC	Lossless, bigger files.	Matroska, Ogg
MP3	Lower quality to compression ratio than Opus and Vorbis.	Matroska

Re-encode Media with FFmpeg 

Here are some example commands for reencoding video files using FFmpeg.

Encode	Command	Comments
VP9, Opus, WebM	ffmpeg -i "INPUTFILE" -c:v libvpx-vp9 -b:v 0 -crf 5 -vf scale=-2:600 -cpu-used 5 -row-mt 1 -c:a libopus -b:a 96K "OUTPUTFILE.webm"	"-vf scale=-2:600" scales the video down to 600p vertical resolution while keeping the aspect ratio. "-crf 5" is the video quality from 0 to 63, lower being better. For the constant quality to work the bitrate has to be set to "0" via "-b:v 0".
VP9 (Hardware accelerated), Opus, WebM	ffmpeg -i "INPUTFILE" -c:v vp9_vaapi -b:v 2000k -c:a libopus -b:a 96K "OUTPUTFILE.webm"	VP9 hardware acceleration is currently only supported by Intel Kaby Lake or newer APUs. Hardware accelerated VP9 does not have a constant quality setting, so bitrate needs to be used instead.
VP8 (Hardware accelerated), Opus, WebM	ffmpeg -i "INPUTFILE" -c:v vp8_vaapi -b:v 2000k -vf scale=-2:600 -c:a libopus -b:a 96K "OUTPUTFILE.webm"	VP8 hardware acceleration is currently only supported by Intel Cherryview/Braswell and newer APUs.
Theora, Opus, Matroska	ffmpeg -i "INPUTFILE" -c:v libtheora -q:v 10 -vf scale=-2:600 -c:a libopus -b:a 96K "OUTPUTFILE.mkv"	"-q:v 10" is the quality from 0 to 10, higher being better.

You can use the ffmpeg -codecs command to see supported codecs.

Additional info can be found with the command ffmpeg -h

Alternatively you can explore these links:

Batch Processing 

Here is an example shell script to batch reencode the contents of a folder on Linux using FFmpeg:

You can name it: vircadia_reencode.sh

With this code in it:

# Modified version of https://gist.github.com/ralphcrisostomo/56fc395b1646bd55aeeb2eb442043887
# Usage: ./vircadia_reencode.sh /SourceDirectory /DestinationDirectory

SOURCE=$1
DESTINATION=$2

while IFS= read -d '' -r ITEM
do

  echo $ITEM

  FILE=${ITEM##*/}
  EXT=${ITEM##*.}
  EXT=$(echo $EXT | tr "[:upper:]" "[:lower:]")
  OUTPUT="$DESTINATION/${FILE%.*}.mkv"

  # Create directory
  [[ -d $DESTINATION ]] || mkdir -p $DESTINATION

echo "" | ffmpeg -i "$ITEM" -c:v libvpx-vp9 -b:v 0 -crf 5 -vf scale=-2:600 -cpu-used 5 -row-mt 1 -c:a libopus -b:a 96K "$OUTPUT"

# All files with the listed extensions will be reencoded.
done< <(find "$SOURCE" \( -iname '*.mp4' -or -iname '*.avi'  -or -iname '*.mkv' -or -iname '*.mts' \) -print0) |

참고

Do not forget to set the script as executable on Linux using something like chmod +x vircadia_reencode.sh

Video Player 

You can embed videos using the HTML5 video tag. This example code can be put into an HTML file on a web server and be used in a Web entity.

<video controls="controls" src="EXAMPLEDIRECTORY/EXAMPLEFILE.webm">
    Your browser does not support the HTML5 Video element.
</video>

See Also

Play Media in a Web Entity

Supported Media Formats

Re-encode Media with FFmpeg

Batch Processing

Video Player