Codecs and formats we support

Note: you can upload all codecs and formats but see the lists down below for the ones that we support. The ones that are not supported can’t be viewed in KLASH, only downloaded and uploaded.

For best viewing experience in KLASH, the recommended browser for playback is Google Chrome on Windows or Mac, or Microsoft Edge on Windows.

The main impact to longer processing speeds is the size of the file which is affected by the bitrate. Low bitrate will always process faster. MOV ProRes has a tendency to use huge bitrates and can take a long time to process because of it.
We recommend keeping bitrates low, around 10 Mbit, to ensure both a good viewing experience (when viewing the original file) and speed of processing (for proxies).

Note that whatever settings you use on your originals will not matter if the viewer is viewing a proxy that we generate.

Input container/file formats

File formats (file extensions) Supported

✅ FLV (with H.264 and AAC codecs) (.flv)
✅ MXF (.mxf)
✅ 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
❌ Lagarith Lossless Video Codec
✅ Images (.png, .jpeg/.jpg, .webp, .psd, .tiff)
✅ SVG (.svg
✅ GIF (.gif)
✅ PDF (.pdf)
✅ GLB (.glb)
❌ OBJ, FBX (.obj, .fbx)
✅ Text (.txt)

¹ Fast Track indicates that the file will be playable immediately after upload. No transcoding will be necessary, however we will transcode the video to multiple proxies (SD & HD) to support varying bandwidths for better experience while playing.

² Timecode support indicates the file’s SMPTE timecode TC_IN and TC_OUT will be read and automatically applied in the Klash video player when using SMPTE timecode format in the player.