Doesn't matter. Don't edit with distribution encodes, they aren't and never were meant to be edited with. Support of it via a proxy like AviSynth is the only safe way to handle such files short of a full reconversion to the lossless format of your choice (HuffYUV, ffvhuff/HuffYV12, Lagarith, FFV1, H.264 Lossless, Lossless JPEG, CorePNG, Uncompressed, etc.).Fuzzy Chickens wrote:But how many PROGRAMS are capable of importing and editing .mp4 files?
Unless by 'importing' and 'editing' you mean purely container (ex. concatenation, splitting, or mux/demux) and metadata-related tasks. MP4Box and apps like AtomicParsley can do that just fine.