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Exported video quality not good as source
Posted: Tue Jun 28, 2016 4:33 pm
by pentavalle
Hi,
I used PIP overlay function in LapTimer 20.0.14, front video is imported from GitUp2 at and rear video from a Soocoo S20W, both at 1920x1080, quality of sources is good but overlay video is not so good, at least in my opinion, take a look at asphalt and clouds in full screen to see differences in colors and artifacts.
Original video from front cam:
https://youtu.be/sjg5ZsV7Q1s
Overlay video with PIP:
https://youtu.be/xKHvE1Vzbss
Export video quality is at maximum (untouched default), what do you think about result? Could it be better?
Re: Exported video quality not good as source
Posted: Tue Jun 28, 2016 5:43 pm
by Harry
Low bandwidth currently, I can't look into the video now. Please add your smartphone type and Android version.
- Harry
Re: RE: Re: Exported video quality not good as source
Posted: Wed Jun 29, 2016 10:49 am
by pentavalle
Harry wrote:Low bandwidth currently, I can't look into the video now. Please add your smartphone type and Android version.
- Harry
Xiaomi MI4C running Android 5.1.1
Inviato dal mio Mi-4c utilizzando Tapatalk
Re: Exported video quality not good as source
Posted: Wed Jun 29, 2016 7:17 pm
by pentavalle
Forgot to mention that I didn't force software encoding on my lollipop, so I used hardware encoding.
Inviato dal mio Mi-4c utilizzando Tapatalk
Re: Exported video quality not good as source
Posted: Wed Jun 29, 2016 8:37 pm
by Harry
When using hardware accelerated encoding, LapTimer does not influence quality beyond setting usual standards for H.264 / AAC videos. So the quality setting in Expert Settings has no influence and a lot depends on the manufacturer's choices for the encoder used. Without having looked into your video, you may try to Force Software Encoding and try the same video to check if this is producing better quality.
- Harry
Re: Exported video quality not good as source
Posted: Thu Jun 30, 2016 9:00 am
by pentavalle
Tried with sw encoding of just 1 lap and quality difference is incredible, file size is higher obviously. I attached Mediainfo output for both files to let you take a look in tech specs. Really sorry if nothing can be done to have better results with hw encoder, because sw encoder is so slow.
Re: Exported video quality not good as source
Posted: Thu Jun 30, 2016 9:56 am
by Harry
The software version used MPEG4/2 encoding - which is by far less space optimized (at the same quality as H.264).
The bitrate applied by the Xiaomi is a bit more aggressive than set (LapTimer sets 8Mbit/s for FullHD videos) and uses 7.2Mbit/s. I will consider adding a bitrate multiplier as an Expert Settings for version 20.1, please watch the release notes for new versions appearing.
- Harry
Re: Exported video quality not good as source
Posted: Thu Jun 30, 2016 12:45 pm
by pentavalle
Wonderful! Thanks!