Supported Filetypes

The New Spark Platform transcoder accepts just about anything you can throw at it. We strive to support all consumer devices and myriad configurations, and our file conversion success rate is over 99%.

Below is a list of media types supported by the platform.

Image formats


Supported extension(s) Name
bmp Bitmap
eps Encapsulated PostScript
jpg,jpeg Joint Photographic Experts Group
gif Graphics Interchange Format
pdf * Portable Document Format
png Portable Network Graphics
psd Photoshop
tiff,tif Tagged Image File Format
Raw Formats( Supported as Of September 15, 2014)
crw,cr2,dng Canon Raw
nef,nrw Nikon Raw
mrw Minolta Raw
raf Fuji Raw
arw Sony Raw
pef,dng Pentax Raw
orf Olympus Raw
kdc Kodak Raw
orf Olympus Raw
3fr Hasselblad Raw


* Note: Only PDFs encoded with supported compression formats (ie. jpeg) are supported. Only the first page of a PDF document is transcoded.

Media formats / containers

This list of file formats are common wrappers/containers for video and audio streams. In some cases a wrapper indicates also which codecs are embedded (mp3 for example), but a file has an .mov wrapper does not necessarily mean we also support its audio or video codecs.


Common extension(s) Description
3g2 3GP2 Format
3gp 3GPP Format
ac3 Raw AC3
aac Advanced Audio Coding
aiff Audio Interchange File Format
amr 3GPP AMR Format
asf ASF Format
au Sun AU format
avi AVI format
dirac Raw Dirac format
dv DV format
flav Raw FLAC
flv Flash Video
mkv Matroska format
mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG-4/Motion JPEG 2000 format
mp2 MPEG audio layer 2
mp3 MPEG audio layer 3
mpeg, mpg MPEG format
ogg OGG format
wav WAV format
mts AVCHD multiplexed video/audio stream


Video codecs


Compression type
FLV (H.263/Spark and On2 VP6)
H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
MPEG-4 (part 2)
On2 VP3
On2 VP5
On2 VP6
RealVideo 1.0
RealVideo 2.0
WMV1 (Windows Media Video 7)
WMV2 (Windows Media Video 8)
WMV3 (Windows Media Video 9)



Audio codecs

Compression type
ATSC A/52A (AC-3)
ALAC (Apple Lossless Audio Codec)
AMR (adaptive multi-band rate (narrow and wide-band))
FLAC (Free Lossless Audio Codec)
MP2 (MPEG audio layer 2)
MP3 (MPEG audio layer 3)
Nellymoser (within the FLV format)
Windows Media Audio 1
Windows Media Audio 2


Recommended source file formats

Video Format

We currently have the best support for MPEG-4 H.264/AVC format. We recommend using this format to upload video files. Often these files have .mov or .mp4 extensions. If you intend to use passthrough, make sure the file has .mp4 extension by following the Video Encoding Guidelines.


We re-encode every uploaded audio file to MP3. If you'd like to keep the highest possible quality we recommend uploading in MP3, as these files just pass-through (meaning, we won't reconvert them.)

Some transcoder components, such as the video mixer will resample every incoming audio track (and audio file or an audio stream in a video) to 44100Hz. We recommend using this sampling rate as resampling audiotracks could result in quality degradation.

Files with a mono audio stream will be converted to joint-stereo for most output formats. Multi-channel audio (5.1, DTS, etc...) will be down-mixed to stereo.


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