Edit Infobox DS Homebrews: MPEG4 Player by Gericom

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MPEG4 Player is a video player for DS and DSi created by Gericom. It is a based on YoutubeDS and was modified into a useable video player. Currently it plays mpeg4 video and aac audio in a mp4 container. ==User guide== ===How to convert video=== Use a recent version of [https://ffmpeg.org ffmpeg]. The player plays 176x144 stretched to widescreen with a little filtering and 256x144. Instead of the normal YUV color space, YCoCg is used because it is faster to convert to rgb (ignore any warnings you get about it; on a PC the colors will look wrong, but it's fine in the player). Recommend settings for DS: <span style="white-space: pre-wrap">ffmpeg -i %1 -f mp4 -s 176x144 -vf ""colorspace=space=ycgco:primaries=bt709:trc=bt709:range=pc:iprimaries=bt709:iall=bt709"" -dst_range 1 -color_range 2 -vcodec mpeg4 -profile:v 0 -level 8 -b:v 350000 -acodec aac -ar 22050 -b:a 64000 -ac 1 -slices 1 -g 50 %2</span> Recommend settings for DSi: <span style="white-space: pre-wrap">ffmpeg -i %1 -f mp4 -s 256x144 -vf ""colorspace=space=ycgco:primaries=bt709:trc=bt709:range=pc:iprimaries=bt709:iall=bt709"" -dst_range 1 -color_range 2 -vcodec mpeg4 -profile:v 0 -level 8 -b:v 500000 -acodec aac -ar 32000 -b:a 128000 -ac 1 -slices 1 -g 50 %2 </span> In both cases replace %1 with your input video (e.g. input.mp4) and %2 with your output video (e.g. output.mp4). ===Parameters/Settings=== * Bitrates - Higher bitrates and such may work, depending on the video. * Framerates - Supported framerates are 23.976 fps and 29.97 fps, although on ds 23.976 will likely give the best results. ** Other framerates are not properly supported, as currently the rate is not completely correctly read from the mp4 container. ** It also seems that the bitstream changes a bit with some rates, which make the decoding fail. ** If your input video doesn't have the right rate, add fps=24000/1001, before colorspace in the commands above. Note that with long videos audio issues may appear after playing for a while. This is related to the precision of the audio timers on arm7. You will have to adjust the video rate so that it matches the amount of increase/decrease in audio rate to fix that (something smaller than 1%, won't be noticable). ===Additional=== * [https://wiki.ds-homebrew.com/ds-index/videoplayers Video players guide] from DS-Homebrew Wiki. * Some helpful notes by [https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095/page-5#post-9352252 mive] and [https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095/post-8726823 Pk11]; how to split video into 5 minute segments by [https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095/page-6#post-9520852 jonjonmia] and [https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095/page-3#post-9268893 mive]. * Alternatively you can use [https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095/page-5#post-9493330 MPEG4DS Assistant], a user-friendly converter made by JustScratchCoder (note that you still need to have ffmpeg installed). * See also [https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095/post-9007621 a mod version] made by Pk11. ==Controls== B (while playing a video) - Return to the file browser ==Compatibility== Works particularly well on DSi. ==Credits== Special thanks to @Pk11 for helping with testing and adding the file browser. ==External links== * GBAtemp - https://gbatemp.net/threads/mpeg4-player-for-ds-and-dsi.544095 * GitHub (Gericom) - https://github.com/Gericom/YoutubeDS/tree/mpeg4player * GitHub (Pk11) - https://github.com/Epicpkmn11/YoutubeDS/tree/mpeg4player-different-font