MP4TOOLS 2 PASS ENCODING TRIAL

All I'm saying is eliminate your expectations as a possibility of why you are seeing a difference first, then worry about bitrate.I will be encoding different videos uploaded by the user asynchronously in my server. Maybe there really is a difference in the visual quality of your rips, maybe not.

MP4TOOLS 2 PASS ENCODING TRIAL

There was a point where going too low decreased the quality, but that's a matter of trial & error with the video you're ripping/transcoding. Some of the resulting videos had 2-3x the bitrate & file size, but no noticeable increase in quality. They look at something like the bitrate of a file, see it is much lower than another file, and then somehow 'see' a difference in the video quality because of their expectation the file will be of worse quality, then I look at the files and they are virtually indistinguishable.Īnother case in point, a looooong time ago when I was first ripping/transcoding videos, I tested various settings. I can't begin to tell you how many times I have seen somebody complain about the quality of something simply because of doing something like that. Knightplex, another thought: don't look at the bitrate and other file information BEFORE you check out the quality of your rips by watching them. Either the file is too large and does not stream well everywhere, its too small and I see artifacts etc. I am ripping my entire blu ray collection to my plex server and I still dont have a recipe that I am completely happy with.

This is something I struggle with to this day. he is hoping someone with more experience can give him some tips on getting great quality at a low size. Scott Why the agitation ? It is an ambiguous topic. This is like the 3rd or 4th time you've asked us to 'discuss' these WIDE OPEN, VAGUE 'questions'. While some may tell you that the difference is that, with a 2nd pass, the encoder gets to tweak more things than just bitrate, and so can still benefit CBR, in REAL LIFE the the answer is: expecting us to provide you with this week's media class assignment. What is the difference between 1pass CBR and 2pass(3pass) CBR or how it works? It always made my head spin, not that I ever used it but it seems to be right thread to get an answer. If you encode a video using constant quality encoding, then go back and make another video the same size using 2-pass VBR encoding, the two videos will be the same size and similar quality. You're saying 'I don't care what the file size is, I what THIS quality.' When your primary concern is quality you use constant quality encoding. You're saying 'I don't care what the quality is, I want a file of THIS size.' Because file_size = bitrate * running_time. When your primary concern is the file size you use 2-pass VBR encoding. Single pass constant quality: you pick the quality, the encoder uses whatever bitrate is necessary to deliver that quality at each frame. This produces better quality than single pass CBR because bitrate isn't wasted on parts of the video that don't need it. Subsequent passes (if requested) refine the video futher. It allocates more bitrate to parts that need it, less to parts that don't. During the second pass it encodes the video using that information.

During the first pass the encoder examines the entire video to see what parts need more bitrate and what parts need less. Multipass variable bitrate: you pick the bitrate the encoder delivers whatever quality it can for that bitrate. If the bitrate is very high the video may be of good quality but bitrate will probably be wasted on lots of shots that didn't really need it. If the bitrate is very low the video will be of low quality. Single pass constant bitrate: you pick the bitrate, the encoder encodes the entire video at that bitrate.

Mp4tools 2 pass encoding