Why some formats are accepted; some are not?

Most of the time, I take the files straight from my Sony camera and uploads them. Pond5 accepts them beautify while some other websites reject them. This is queer. Does anyone know why?

Because Sony outputs video in many cases as a proprietary format, and Pond5 has a more all-encompassing acceptance. If you are talking RAW stills, by the way, same with those ... I think Lightroom even needs a special plugin to load Sony .arw files. Best to encode to PJPEG or (better) ProRes/ProREsHQ. Your files will not be rejected for format in any agency I know of. You can also encode to high aspect h.264 ... see other recent threads regarding that .. make sure to use very high bit rate! (200-300mb/s)

Oh, that makes sense. Thanks Mizamook!

Why to use very high bitrate when using h.264 codec if your original material is filmed with much lower bitrate?

For example if I record with my SLR HD videoclip which has a max of 40Mbit rate ain't it best option to save space and use that bitrate to save h.264 mp4?

TIA for the answers.

LRTimelapse codecs are rejected too, it's the most efficient timelapse rendering programme

@ OliverM That's your opinion as being the most efficient program.

@Miz - Adobe products have been supporting all Sony codecs without issue since any new ones have come out. A sony .arw file only applies to photographs and is also fully supported since its release. As far as Sony "proprietary format" as you call it, this is not the case. It is standard MP4, and again all adobe products work without issue. As far as lightroom is concerned; you simply need to have the latest RAW processor as well as lightroom installed. It all works without any issue. Of course if an individual decides to not keep up to date on such products, they may be missing out on such compatibility. Adobe has been very fast at updating its RAW components over the last couple of years. I have only had one time where I waited a few days for a new update to arrive that would work with the Sony arw files. Sony is a standard. Canon is a standard. Many others also create their standards (Red for example) The software guys know this and immediately release components whenever there is a change, new Codec etc. As far as the encoding side of things, certain codecs only make sense if the data is there. ProRes may not always be the best solution as it may actually produce garbage due to lack of data. Pjpeg is at least a good "neutral" way to go and never gives any issues even as far back as when we had interlaced footage. It is important to provide correct information and/or at least links to correct information as many newcombers and even oldcombers really don't spend a lot of time trying to understand how this all works, they just want to know what works. So the correct answer for Pond5 acceptance would be: https://help.pond5.com/hc/en-us/categories/200073753-CONTRIBUTOR-FAQ and look under "Media Upload Specifications". Eash Agency has such information and usually pretty concise and clear. In regards to the codecs you list, what about things that need an alpha channel? To get the best of the best for that one needs to stray from said codecs, no? (Png w alpha - well accepted or perhaps ProRes 4444 which in turn many agencies reject.) So for those that don't want to read the P5 FAQ, here is the section that tells it all: Codecs

We accept the following codecs (in order of preference):

Unmodified camera-native codecs, including r3d (see below),AVCHD, H264, PRORES, DNxHD, DNxHR, M2TS, XDCam, MXF, HDV, DV, DVCProHD.
Apple ProRes
Avid native DNxHD
H.264: We accept H.264 when it's the camera's native codec or as a broadcast quality intermediate. Camera-native files can be uploaded without modification. For intermediate H.264, make sure that it is set to the highest quality.
PhotoJPEG. Please set to highest quality possible.
Animation or PNG: ONLY for clips with embedded alpha channels. (transparency)
We do not accept the following codecs:

Motionjpeg
Avi
Non native mp4
Our system does not yet support DNxHR 4k resolution clips, however we are working to remedy this. Please check here for any developments.
Uploading r3d (RED camera native files)

.r3d - files should be uploaded within a ZIP file which must include .r3d file itself as well as color corrected or original version of .MOV preview file not less than 1080P (1920X1080) in size.

You may include .rmd (color grading info) file if the preview clip is color graded.

After upload you will be able to price/sell video file separately or in combination with .r3d file bundle.

Video file included should be provided in .MOV file format with ProRes HQ/LT, Photo Jpeg or H264 codec.

Zip file size should not exceed 6GB.

Yes, Pond5 is the best. Just wondering whats up w the rest of the other stock video providers?