Supported file formats and codecs

Supported file formats and codecs are the types of files that can be viewed on KLASH. However, you can still upload, store, and create download links for any type of file on the platform. Recommended browsers are Google Chrome on Mac, and Google Chrome or Microsoft Edge on Windows.

Supported input container and file formats (file extensions)

KLASH supports the following file formats and codecs:

• FLV (with H.264 and AAC codecs) (.flv) 

• MXF (.mxf, see MXF profile support below)

• GXF (.gxf)

• MPEG2-PS, MPEG2-TS, 3GP (.ts, .ps, .3gp, .3gpp, .mpg)

• Windows Media Video (WMV)/ASF (.wmv, .asf)

• AVI (Uncompressed 8bit/10bit) (.avi)

• MP4 (.mp4, .m4a, .m4v) with Fast Track¹

• ISMV (.isma, .ismv)

• Microsoft Digital Video Recording(DVR-MS) (.dvr-ms)

• Matroska/WebM (.mkv)

• WAVE/WAV (.wav)

• QuickTime (.mov) with Timecode²

• Images (.png, .jpeg/.jpg, .webp, .psd, .tiff)

• SVG (.svg)

• GIF (.gif)

• PDF (.pdf)

• GLB (.glb)

• FBX (.fbx)

• Text (.txt)

Not supported

KLASH does not support playback of 5.1 mixers, due to the platform being web browser-based and web browsers not supporting it.

Note: Web browsers only support playing one video and one audio track, and it always chooses the first audio track. This track can be either mono or stereo. Make sure that when you export your audio from your editing program, you merge all tracks into the first track.

The following file formats and codecs are not supported:

• Lagarith Lossless Video Codec

• HDR10 & HDR10+

• OBJ (.obj)

• HEIC

HDR

KLASH supports regular HDR files, as long as you are viewing the files on a monitor that supports it. HDR10 and HDR10+ are not supported.

Processing times

The main impact of longer processing times is the size of the file and the bitrate. Low bitrates process faster, while high bitrates can take longer to process. MOV ProRes can have high bitrates and take a long time to process because of it.

The recommendation is to keep bitrates low, around 10 Mbit, to ensure both a good viewing experience when viewing the original file and the speed of transcoding the original file into proxies.

Note: The format and codec of your original file will not matter if the viewer is viewing a proxy that KLASH generated for you.

¹ Fast Track indicates that the video file will be playable immediately after upload. No transcoding is necessary. However, KLASH can still transcode the video to multiple proxies in the form of SD and HD to improve the viewing experience on varying bandwidths.

² When using the SMPTE timecode format in the studio on KLASH, timecode support indicates that the file’s SMPTE timecode TC_IN and TC_OUT will be read and automatically applied.

MXF profiles

This table shows which codecs are supported under each MXF profile. Other profiles not listed here are not supported, such as OP-Atom.