[FFmpeg-user] playing av1 converted media files in android.

[Guddla Rupesh]

Hi I am Rupesh from India and I have android tablet and smartphone, Linux
pc. I have downloaded high quality youtube MP4 video files and it's size is
upto 60 gb. I have converted these files to av1 codec using ffmpeg and
libaom but I can't play these videos in android smartphone or tablet.

Here I am providing huge explanation as it tries to track the exact issue.

I have downloaded some youtube videos and some files are of size upto 60 mb
to 100 mb with duration upto 15 minutes. I have converted these files to
av1 codec using ffmpeg and used libaom for video, libopus for audio. 100 mb
avc video file is converted to av1 of size 24 mb.

Here youtube videos are downloaded in Linux terminal emulator using a
program called yt-dlp which is an youtube downloader. This program tries to
download original youtube videos uploaded without converting to another
video file. Some of the other youtube downloaders are videoder, TubeMate,
newpipe, snaptube etc.,.

All YouTube downloaders like videoder TubeMate newpipe snaptube etc first
download a video and converts to other video and save the output file which
results in the quality loss. But yt-dlp and youtube-dl download youtube
videos without converting to another video file.

The input video file provided to ffmpeg tool consists of avc or x264 codec
for video and aac codec for audio. I have created a small shell script to
convert all avc video files to av1 files. Now if I pass a 100 mb avc video
file to this script an av1 video file is generated of size 24 mb.

Here input video file consists of avc or x264 for video and aac codec for
audio. The output file converted consists of av1 codec for video and opus
for audio.

All the files converted by ffmpeg and libaom are being played in android
smartphone or tablet but few others can't especially the splitted ones.

Some of the youtube videos downloaded are of size 1 gb to 1.4 gb with high
quality video and audio with duration 3 hours.

I have splitted these large size 1.3 gb avc video file into 8 equal parts
using qwinff which is a gui for ffmpeg. I have passed splitted 130 mb to
the same ffmpeg script.

All the avc video files converted to av1 files successfully without any
errors. Here the issue is the converted output av1 video files are unable
to play using vlc media player especially in android smartphone and tablet
but they are playing properly in Linux system.

Here upon conversion to av1 there's huge reduction in disk space and audio
and video quality are acceptable to me but can't play properly in android
devices.

These videos are unable to play means suppose I open any video file I am
able to see video with audio and if I move the seek button to say 20 mins
then the vlc media player stops video at that time but audio will be
running. Here there is no continuous play without any jurk.

I heard that av1 codec has less support in all platforms and in future it
may be supported by all devices. I have even enabled full acceleration etc
and even no use.

Kindly try to suggest how to play these videos in android smartphone or
tablet using vlc media player or any other player. If it's not possible
take it easy.

Regards,
Rupesh.