Homebrew Homebrew app [Release] Video player for 3DS

[AleronIves]

There's no point to that. The way to get optimal 3DS video quality is to use a sharp scaler to resize your video to 800x240 (SAR 1:2) before you encode it for use on the 3DS.

 

[DragonW]

I'm not sure I understand what you mean by a sharp scaler, but in my testing 960x540 (as an example) looks way better after being downsampled with bilinear filtering than it does being downsampled to 800x240.

Maybe I'm just not aware of the tricks to use but generally I just feed my 3DS 540p and let the linear filtering setting provide an anti-aliasing effect.

 

[AleronIves]

Bilinear is the worst (least sharp/most blurry) scaler, so it's not surprising that you get blurry results. You want to downscale with a sharp scaler like Lanczos, Blackman, or Spline36 (in AviSynth). Bicubic is less bad than Bilinear but still bad.

 

[DragonW]

Could the 4:2:0 color space be making the image look lower rez than it needs to be at 800x240? From reading this it seems like yuvj4:2:0 is the only format the 3DS supports.

 

[AleronIves]

Chroma subsampling is always employed in consumer video, so that's not it. Do you have 800px mode enabled? It's possible that you find the downscaling algorithm visually appealing, but using 960x540 on the 3DS wastes a lot of space and doesn't give you extra quality on the 800x240 screen. It will also wear the battery down faster, since it's harder to decode.

 

[DragonW]

Yes, 800px mode is enabled. I mostly notice the artifacts when a video has a lot of red in it, almost like the resolution of the color is half rez or something no matter what scaler I've used (Nearest, Bilinear, Lanczos).

Super sampling down from resolutions higher than native makes that particular issue go away, though in recent testing it doesn't seem to make too much difference beyond that when I use good scaler.

 

[AleronIves]

Chroma subsampling does indeed mean that chroma is quarter resolution. A 1920x1080 image has 960x540 colour resolution with 4:2:0 subsampling. There are no sources of 4:4:4 video available to you (DVD, BD, YouTube, etc.), so you can't fix that.

 

[jamespoo]

does this support playback of downloaded youtube that are h.264 240p?

 

[Core_2_Extreme]

Any way the "Correct Aspect Ratio" function could support 1600x480 (for supersampling) video? should be the same aspect as 800x240.

I think it is supported.
Did you encounter a problem?

 

[Core_2_Extreme]

does this support playback of downloaded youtube that are h.264 240p?

Yes.
But on OLD3DS use 144p because the resolution is too high for OLD3DS to decode.

 

[jamespoo]

Yes.
But on OLD3DS use 144p because the resolution is too high for OLD3DS to decode.

thanks

 

[withthelemons]

Yes, 800px mode is enabled. I mostly notice the artifacts when a video has a lot of red in it, almost like the resolution of the color is half rez or something no matter what scaler I've used (Nearest, Bilinear, Lanczos).

Super sampling down from resolutions higher than native makes that particular issue go away, though in recent testing it doesn't seem to make too much difference beyond that when I use good scaler.

What you are describing might be so called "bitstarved chroma" (first google image result will show you what it looks like)
It can be fixed by encoding at higher bitrate/lower crf or setting lower chroma qp offset (which will result in more bits allocated for chroma)

-x264-params chroma-qp-offset=-1

 

[Memedew]

Video player for 3DS

Discord channel : https://discord.gg/MMsAXvetpR

If you want to watch youtube video on your 3ds, you can use thirdtube (developed by @windows_server_2003)

On NEW 3(2)DS, it is recommended to use patched Luma3DS for better performance.​

v1.5.2

Changes​

Ignore unsupported codec so that you can play supported codec only
(e.g. You can now play videos that contain unsupported subtitles/audio)

Fixed bugs​

Hardware decoder won't play videos that contain B-frames smoothly has been fixed
(It means you don't have to care about B-frames when encoding to H.264 videos)
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.5.2

v1.5.1

Added features​

Screen update frequency in audio only files have been increased
Performance has been improved by adding DMA
Video playback is automatically paused when runs out of buffer
(You can change threshold by changing 'Restart playback threshold' settings)
Seeking speed has been improved

Changes​

Disallow sleep when only headset is connected
(allow sleep if headset is disconnected during playback)
App directory has been changed from sdmc:/Video_player/ to sdmc:/3ds/Video_player/
(App will automatically move folder)
Simplified Chinese(简体中文) translation has been updated
Enabled 'correct aspect ratio option' by default

Fixed bugs​

Crashes in hw decoder in some videos have been fixed
Automatically enter full screen mode even file explorer is opened has been fixed
App will freeze if you seek after EOF has been fixed
Unable to pause/resume in tagged mp3 has been fixed
Video position won't be saved in some cases have been fixed
Glitch on video in full screen mode has been fixed
Some directories can't be entered have been fixed
Some videos won't be played at correct speed has been fixed
Frame desync in some 3D videos have been fixed
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.5.1

v1.5.0
Subtitles have been supported (*0)
Disable video, audio and subtitle have been added
Audio desync has been fixed
AV1 videos have been supported
The problem some video won't play smoothly in sw decoder has been fixed
Screen brightness adjustment function has been added (DPAD "↑" and "↓")
Other minor changes
*0 No style support, only plain text
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.5.0

v1.4.2
Unexpected touch in Nintendo's home menu has been fixed
Multi-threaded decoding stability has been fixed and it is enabled by default
Seeking stability has been fixed
Repeat, in order, random playback mode have been added
Other minor changes
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.4.2

v1.4.1
The "FSUSER_OpenFile() failed" error has been fixed
Adjusted font and button size in settings menu
Multi-threaded decoding is disabled by default because it has stability problem
Polish(Polski) translation has been added (by JustScratchCoder)
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.4.1

v1.4.0
Decoded image(raw) buffer has been added and it makes playback
much much much much better (especially on OLD3DS)
Spanish(español) translation has been added (by Cookiee)
Romanian(Română) translation has been added (by Tescu48)
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.4.0

v1.3.3
'aspect ratio 10:3 mode' has been changed to 'correct aspect ratio mode' (follow sar value(*0))
Color conversion speed has been improved
Simplified Chinese(简体中文) translation has been added (by LITTOMA)
Italian(italiano) translation has been added (by dixy52-beep)
*0 if video size is 800x240 and no sar value is set, it autmatically apply sar 1:2
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.3.3

v1.3.2
Added aspect ratio 10:3 mode (for 800x240 videos)
Added disable resize and move video mode
Added remember video pos mode (resume from that pos next time)
Other minor changes
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.3.2

v1.3.1
Volume adjustment has been added (from 0% to 999%)
Direction pad seeking has been added (from 1 second to 99 seconds)
Hungarian(magyar) translation has been added (by vargaviktor)
Other minor changes
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.3.1

v1.3.0
The video that has more than one audio tracks has been supported (Press Y key-> select audio track to select track)
Multi-threaded decoding has been supported (Press Y key-> use multi-threaded decoding to toggle)
Hardware decoder has been merged (Press Y key-> use hw decoder to toggle)
Full screen mode has been supported (Press select key to toggle)
Other minor changes
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.3.0

v1.2.0
Hardware decoding won't work in .cia has been fixed
Hardware decoding won't work in some resolution has been fixed
Added hardware color conversion for software decoder
Added 3D video support(*)
Other minor changes and optimization

* New 3DS or 3DS only, software decoder only, in order to see 3D video as 3D you need to enable 3D mode in settings(settings->LCD->Screen mode->3D)
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.2.0

v1.1.1
Video will not be decoded correctly in hardware decoder has been fixed
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.1.1

v1.1.0
Added hardware decoder (β)
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.1.0

v1.0.1
Added allow skip frames option
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.0.1

v1.0.0
Initial release
Download : https://github.com/Core-2-Extreme/Video_player_for_3DS/releases/tag/v1.0.0

Source : https://github.com/Core-2-Extreme/Video_player_for_3DS

View attachment 255791

Features
Hardware accelerated decoding(*0)
Hardware accelerated color conversion
Multiple video codec support(MPEG4, H.264, H.265, Motion Jpeg)
Multiple audio codec support(mp1, mp2, mp3, ac3, aac, ogg, pcm audio)
Seek
3D video(*1)
Zoom in/out video
Move video
File explorer

*0 New 3DS and New 2DS only
*1 New 3DS and 3DS only, software decoder only, in order to see 3D video as 3D
you need to enable 3D mode in settings(settings->LCD->Screen mode->3D)
How to convert your 3d video for 3DS : https://gbatemp.net/threads/release-video-player-for-3ds.586094/page-10#post-9575227 (by T0biasCZe)

Performance
Decoding speed depends on encoder option, video type, video scene, etc...
This table shows average fps, so you may hear stutter audio if you use this framerate.
(Lower video resolution or framerate in that case)
Software decoding in this table uses only one thread not multi-threaded decoding.

MPEG1video​

MPEG1video test file was encoded following command :
ffmpeg -i {input_file_name} -acodec copy -vcodec mpeg1video -s {width}x{height} -r 30 -q:v 15 {output_file_name}

MPEG1video	256x144 (144p)	426x240 (240p)	640x360 (360p)	800x240	854x480 (480p)
OLD3DS Software decoding	69.0fps	39.9fps	24.0fps	27.4fps	16.7fps
NEW3DS Software decoding	532.0fps	267.2fps	119.8fps	158.0fps	69.4fps

​

MPEG2video​

MPEG2video test file was encoded following command :
ffmpeg -i {input_file_name} -acodec copy -vcodec mpeg2video -s {width}x{height} -r 30 -q:v 15 {output_file_name}

MPEG2video	256x144 (144p)	426x240 (240p)	640x360 (360p)	800x240	854x480 (480p)
OLD3DS Software decoding	67.1fps	37.6fps	22.3fps	26.3fps	15.4fps
NEW3DS Software decoding	518.8fps	254.2fps	113.9fps	145.7fps	65.9fps

H263+​

H263+ test file was encoded following command :
ffmpeg -i {input_file_name} -acodec copy -vcodec h263p -s {width}x{height} -r 30 -q:v 15 {output_file_name}

H263+	256x144 (144p)	424x240 (240p)	640x360 (360p)	800x240	856x480 (480p)
OLD3DS Software decoding	62.8fps	35.6fps	21.1fps	24.6fps	8.7fps
NEW3DS Software decoding	527.9fps	257.8fps	113.1fps	144.2fps	33.9fps

H264​

H264 test file was encoded following command :
ffmpeg -i {input_file_name} -acodec copy -vcodec libx264 -s {width}x{height} -r 30 -preset fast -profile:v baseline {output_file_name}

H264	256x144 (144p)	426x240 (240p)	640x360 (360p)	800x240	854x480 (480p)
OLD3DS Software decoding	30.7fps	15.9fps	8.8fps	10.2fps	5.4fps
NEW3DS Software decoding	226.7fps	95.1fps	43.4fps	53.2fps	25.1fps
NEW3DS Hardware decoding	560.6fps	338.7fps	206.0fps	235.3fps	114.7fps

H265​

H265 test file was encoded following command :
ffmpeg -i {input_file_name} -acodec copy -vcodec libx265 -s {width}x{height} -r 30 -preset fast -profile:v main {output_file_name}

H265	256x144 (144p)	426x240 (240p)	640x360 (360p)	800x240	854x480 (480p)
OLD3DS Software decoding	22.4fps	11.3fps	6.2fps	7.2fps	3.9fps
NEW3DS Software decoding	136.8fps	55.7fps	26.4fps	30.9fps	15.3fps

Supported video codec
Motion jpeg
MPEG4 (MPEG4 part2)
MPEG1video
MPEG2video
H.263
H.263+
H.264 (MPEG4 part10)
H.265 (HEVC)

Supported audio codec
mp1 (MPEG audio layer 1)
mp2 (MPEG audio layer 2)
mp3 (MPEG audio layer 3)
ac3
aac (Advanced audio coding)
ogg (Vorbis)
pcm audio

Controls
A : Play/Pause
B : Stop
Y : Debug
X : Select file
R : Zoom in
L : Zoom out
C/DPAD : Move video
touch the bar : Seek

Hello, is there any way to make a video work with the 3DS's 3d? I can't find anything about it.

Post automatically merged: Oct 28, 2022

3D conversion guide V2
i fully automated the command so you only need to change the INPUT and it will do everything else for you

if you have nvidia maxwell gpus or newer (+- GTX 960 and newer) you can use hardware acceleration version of commands to speed up the converting a lot.
replace the INPUT at the beggining with your movie file name. dont change ANYTHING else.
it will spit you out movie1.avi and movie2.avi
For videos and films longer than 1 hour and 30 minutes, use these commands:

ffmpeg -i INPUT -vf scale=800:240:flags=neighbor scaled.mkv && ffmpeg -i scaled.mkv -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[r]stereo3d=sbsl:mr[right]" -map [left] -map 0:a -c:a copy left.mkv -map [right] -map 0:a -c:a copy right.mkv && mkdir 1 && mkdir 2 && ffmpeg -to 1:30:00 -i right.mkv -c:v copy -c:a copy .\1\right.mkv && ffmpeg -to 1:30:00 -i left.mkv -c:v copy -c:a copy .\1\left.mkv && ffmpeg -ss 1:30:00 -to 3:00:00 -i right.mkv -c:v copy -c:a copy .\2\right.mkv && ffmpeg -ss 1:30:00 -to 3:00:00 -i left.mkv -c:v copy -c:a copy .\2\left.mkv && ffmpeg -i .\1\left.mkv -i .\1\right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -b:v 3M -ac 2 movie1.avi && ffmpeg -i .\2\left.mkv -i .\2\right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -b:v 3M -ac 2 movie2.avi

Hardware accelerated version:

ffmpeg -i INPUT -vf scale=800:240:flags=neighbor  -c:v h264_nvenc -maxrate 100M -b:v 12M -minrate 6M scaled.mkv && ffmpeg -i scaled.mkv -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[r]stereo3d=sbsl:mr[right]" -map [left] -map 0:a -c:a copy -c:v h264_nvenc -maxrate 100M -b:v 12M -minrate 6M left.mkv -map [right] -map 0:a -c:a copy r-c:v h264_nvenc -maxrate 100M -b:v 12M -minrate 6M ight.mkv && mkdir 1 && mkdir 2 && ffmpeg -to 1:30:00 -i right.mkv -c:v copy -c:a copy .\1\right.mkv && ffmpeg -to 1:30:00 -i left.mkv -c:v copy -c:a copy .\1\left.mkv && ffmpeg -ss 1:30:00 -i right.mkv -c:v copy -c:a copy .\2\right.mkv && ffmpeg -ss 1:30:00 -i left.mkv -c:v copy -c:a copy .\2\left.mkv && ffmpeg -i .\1\left.mkv -i .\1\right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -b:v 3M -ac 2 movie1.avi && ffmpeg -i .\2\left.mkv -i .\2\right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -b:v 3M -ac 2 movie2.avi

if you have video shorter than 1 hour and 30 minutes use these commands

ffmpeg -i INPUT -vf scale=800:240:flags=neighbor scaled.mkv && ffmpeg -i scaled.mkv -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[r]stereo3d=sbsl:mr[right]" -map [left] -map 0:a -c:a copy left.mkv -map [right] -map 0:a -c:a copy right.mkv && ffmpeg -i left.mkv -i right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -b:v 3M -ac 2 movie.avi

hardware accelerated version:

ffmpeg -i INPUT -vf scale=800:240:flags=neighbor -c:v h264_nvenc -maxrate 100M -b:v 12M -minrate 6M scaled.mkv && ffmpeg -i scaled.mkv -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[r]stereo3d=sbsl:mr[right]" -map [left] -map 0:a -c:a copy -c:v h264_nvenc -maxrate 100M -b:v 12M -minrate 6M left.mkv -map [right] -map 0:a -c:a copy  -c:v h264_nvenc -maxrate 100M -b:v 12M -minrate 6M right.mkv && ffmpeg -i left.mkv -i right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -b:v 3M -ac 2 movie.avi

And if you wonder why it needs to be split in two, why not just lower the bitrate...
If you put the 3hour movie into the 4GB, it would look like this...

Nice JPEG ヾ(•ω•`)o
that why it needs to be split into two

if you have MacOS or Linux, you need to convert it manually

Spoiler: OLD GUIDE

SPLITTING (skip if your movie is shorter than 1 hour and 30 minutes)
3DS uses Fat32 which has max 4GB file size. Avi needs at least 3Mb/s with the resolution that 3ds uses to look averagely good (6Mb/s with the 2 video tracks)
with that bitrate, it can fit only fit 1 hour and 30 minutes. but most movies are longer. so we need to split it. use these commands

ffmpeg -to 1:30:00 -i YOURMOVIE -vf scale=852:240:flags=neighbor -c:a copy part1.mkv

ffmpeg -ss 1:30:00 -i YOURMOVIE -vf scale=852:240:flags=neighbor -c:a copy part2.mkv

hardware accelerated version

ffmpeg -to 1:30:00 -i YOURMOVIE -vf scale=852:240:flags=neighbor  -c:a copy -c:v h264_nvenc -minrate 5M -b:v 12M -maxrate 100M part1.mkv

ffmpeg -ss 1:30:00 -i YOURMOVIE -vf scale=852:240:flags=neighbor  -c:a copy -c:v h264_nvenc -minrate 5M -b:v 12M -maxrate 100M part2.mkv

do the following commands to both parts of your movie
3d in video files is side by side in one video track. we first need to extract the 3D into two separate video track so we can convert it to the format that 3ds needs
select either the side by side command or top/bottom command based on your source video

side by side video:
open command prompt in the same directory as your media file, and copy the command, and change INPUT to your video files

ffmpeg -i INPUT -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[r]stereo3d=sbsl:mr[right]" -map [left] -map 0:a -c:a copy left.mkv -map [right] -map 0:a -c:a copy right.mkv

hardware accelerated version:

ffmpeg -i INPUT -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[r]stereo3d=sbsl:mr[right]" -map [left] -map 0:a -c:a copy -c:v h264_nvenc -maxrate 100m -b:v 18m -minrate 10m left.mkv -map [right] -map 0:a -c:a copy -c:v h264_nvenc -maxrate 100m -b:v 18m -minrate 10m right.mkv

top/bottom video

We need to convert the top bottom video to side by side video

ffmpeg -i INPUT -vf stereo3d=abl:sbsl -c:a copy output.mp4

hardware accelerated version:

ffmpeg -i INPUT -vf stereo3d=abl:sbsl -c:a copy -c:v h264_nvenc -b:v 20m -maxrate 100m -minrate 10m output.mp4

now you have side by side video. use the command in "side by side video" section to separate it


now we have the separate left eye video track and right eye video track
The actual conversion
in this step, we take the left eye video and right eye video and put it into 1 file with two video tracks that the 3DS consumes

ffmpeg -i left.mkv -i right.mkv -map 0:v:0 -map 0:a:0 -map 1:v:0 -vcodec mjpeg -s 426x240 -b:v 3M -ac 2 movie.avi

Copy the output file onto your SD card and play it

Cropping the leterboxing so its 16:10 and fill whole screen (OPTIONAL] (DONT DO THIS IF YOU ARE NOT WELL FAMILIAR WITH FFMPEG!)
the video will be stretched, but will fill the whole screen
first, export some frame from the left/right video. then open the frame with gimp (can be photoshop). select everything except the black borders
copy the information about the selection, and paste it into this command (replace out_x with the selection width, out_y with selection heigh, X and Y with the start position of the selection)(replace the LEFTRIGHTVIDEO with your source movie source):

ffmpeg -i LEFTRIGHTVIDEO -vf "crop=out_x:out_y:x:y:" crop.mp4

follow the code in left/right video to separate the files into left right files

[/SPOILER]

Hey, i've tried running your line of code, it managed to convert the files to "3d" but for some reason, when i run the movie.avi on my o3ds and turn the 3D on, The left.mkv & right.mkv are swapped, basically the left is on the right and the right is on the left. Any help?

 

[T0biasCZe]

Would people be interested in "GUI" version of the 3D convertor? And it could also convert 2D videos into the correct format? (so you dont need to duck with ffmpeg?) https://gbatemp.net/threads/release-video-player-for-3ds.586094/post-9575227

Well, 4 months after promising the GUI, i finally got time to do it
it will be able to take input video, and convert it to standard video, hori hd video, and 3ds video, and it can take both left/right and up/down 3D videos. It can also output to mjpeg, mpeg and h264.
you can also select which downscale do you want to use, either lanczos, nearest neighbor, or "mix" (downscales to double of 3ds resolution with lanczos, and then downscales to 3ds resolution with neighbor)
In the future, i am gonna also add a wii mode, which converts videos for WiiMC

Small disadvantage is that its Windows only (since its made in C# and Windows Forms), but if someone uses linux, he propably knows how to use command line...

 

[AleronIves]

You might want to add either H.262 or XviD for O3DS support, since O3DS is too slow to play 240p H.264.

 

[T0biasCZe]

There is mpeg2 and mjpeg
also, i have a question, what are the rules for posting windows programs/executables on gbatemp?

 

[AleronIves]

Oops, I misread MPEG2 as MJPEG2(000).

 

[T0biasCZe]

i found bug in v1.5.2, when i play 24fps H264 3D video on New 3DS, the video runs at double the speed... (in vlc it runs correctly) @Core_2_Extreme

Post automatically merged: Dec 9, 2022

Well, 4 months after promising the GUI, i finally got time to do it
it will be able to take input video, and convert it to standard video, hori hd video, and 3ds video, and it can take both left/right and up/down 3D videos. It can also output to mjpeg, mpeg and h264.
you can also select which downscale do you want to use, either lanczos, nearest neighbor, or "mix" (downscales to double of 3ds resolution with lanczos, and then downscales to 3ds resolution with neighbor)
In the future, i am gonna also add a wii mode, which converts videos for WiiMC
View attachment 342036
Small disadvantage is that its Windows only (since its made in C# and Windows Forms), but if someone uses linux, he propably knows how to use command line...

OK, its done, here is download. If you have any question about the convertor/converting the videos ask.
https://gbatemp.net/threads/nintendo-video-convertor-video-convertor-for-3ds-and-wii.622972/

 

[Core_2_Extreme]

i found bug in v1.5.2, when i play 24fps H264 3D video on New 3DS, the video runs at double the speed... (in vlc it runs correctly)

What command line did you use to encode your videos?

 

[T0biasCZe]

ffmpeg -i "C:\Users\user\Videos\Avatar2_trailer_SBS_3D.mkv" -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[left]scale=800:336:flags=lanczos[left];[left]scale=400:168:flags=neighbor[left];[r]stereo3d=sbsl:mr[right];[right]scale=800:336:flags=lanczos[right];[right]scale=400:168:flags=neighbor[right]" -map [left] -map 0:a -c:a aac -b:a 128k -b:v 2000k -c:v libx264 -bsf:v "h264_metadata=sample_aspect_ratio=1" left.mp4 -map [right] -an -b:v 2000k -c:v libx264 -bsf:v "h264_metadata=sample_aspect_ratio=1" right.mp4 && ffmpeg -i left.mp4 -i right.mp4 -map 0:v:0 -map 0:a:0 -map 1:v:0 -c:v copy -c:a copy "C:\Users\user\Videos\3ds_Avatar2_trailer_SBS_3D.mkv.mp4"
and even on the bottom screen where it shows the time, the timer is running fast
and if i run the same command except with mjpeg, it runs at correct speed
ffmpeg -i "C:\Users\user\Videos\Avatar2_trailer_SBS_3D.mkv" -filter_complex "split[l][r];[l]stereo3d=sbsl:ml[left];[left]scale=800:336:flags=lanczos[left];[left]scale=400:168:flags=neighbor[left];[r]stereo3d=sbsl:mr[right];[right]scale=800:336:flags=lanczos[right];[right]scale=400:168:flags=neighbor[right]" -map [left] -map 0:a -c:a aac -b:a 128k -b:v 2000k -c:v mjpeg -huffman optimal left.mp4 -map [right] -an -b:v 2000k -c:v mjpeg -huffman optimal right.mp4 && ffmpeg -i left.mp4 -i right.mp4 -map 0:v:0 -map 0:a:0 -map 1:v:0 -c:v copy -c:a copy "C:\Users\user\Videos\3ds_Avatar2_trailer_SBS_3D.mkv.mp4"