![]() ![]() The size of a FLAC file can go up to half of its original size, with no lost sound quality during the compression process. M4A was the initial audio format in iTunes Store but is used across other platforms besides Apple devices. This file format makes headway when it comes to sound quality and size. You can easily reset the M4A file format to M4R as a ringtone on your iPhone device. M4A is also DRM-free, enabling flexible editing and transfer of the files.įLAC (Free Lossless Audio Codec) is a lossless audio format compressed to occupy limited space. These files feature lossless compression without losing the audio quality. ![]() ![]() M4A (MPEG-4 Part 14) is an Apple-based file format encoded using the Advanced Audio Coding (AAC) mechanism. In addition to the audio quality, it is vital to consider a lossless format that occupies minimal space and is highly compatible with various platforms.īoth FLAC and M4A are excellent choices, but sometimes you need to make a choice between those two, and your selection will depend on what the audio is used for. Perhaps you are finding an audio container for storing audio in great quality or using it on the websites. For storing lossless audio files, FLAC is the format that will be suitable for you, while M4A can be an excellent format for using on websites because it can be highly compressed. In most cases, an audio file format with excellent sound quality carries the day. I use Audition CS2 for this seems to introduce the least distortion among others when stretching or compressing the audio clip length must absolutely be done.As a developer who has to handle audio and video content, several audio file formats are at your service. If for some reason the audio is indeed longer or shorter then you'll have to stretch or compress it to match the video: never an easy thing to do, and can introduce artifacts. Trimming off ends and dragging the audio clip back and forth the timeline before exporting does the trick. In a majority of cases, the audio is correct it just has a delay or a long or short lead-in. You need a full-fledged NLE to put the intended audio and video on a timeline to inspect, for one. If you want to mux an extracted audio stream or file (which basically doesn't know or care that it came from a 25fps or 30fps container) to some video just mux and see if it's in sync. Everyone here and their pet dragons will know that sample rate, bit depth, and number of channels suffice instead to describe any uncompressed audio file.īut when audio is linked or interleaved in a container with video (like a *.avi) then changing the framerate of that file will necessarily also change the length of the audio along with it if audio and video remained linked or together in that container.Ī 1st, stop referring to audio with framerates or ascribing video framerates to them. But it's true, audio is never referred to with that, but instead by the form hh:mm: ss.msc when it's a file standing alone by itself or demuxed from whatever container that held it along with some video. Audio does have a frame rate, if you can say a sector is a frame as in the case of the original Red Book CDDA, then that is 75fps. But maybe not even then if the video was changed by adding or deleting frames, keeping the time constant. If you convert the video frame rate, you have to compress or stretch the audio proportionately. Is there anything I need to do to synchronise when merging?Īudio "frame rate" is nothing to do with the 24/25/29.97 video frame rate. Just cant have that correctly installed.Īnd if both audio streams are the same length with different fps (is it possible?). If was looking for a eac3to gui, but I've found several of them, but don't know which one is good and do they offer the change framerate option.Īs for besweet I also don't know what problem I've got. I've tried both while ago, eac3to doesnt work at some way and the commandline method is 'too difficult' for me. Ofcourse, if I have found a high quality mkv file which is 25 fps, I need to change the 23.976 audio to 25 fps.Īfter googling I have read the besweet and eac3to are the most popular tools which I can change the audio framerate. I'm using txmuxer and Mkvmerger/extract to rip the audio stream and want to merge them to a 1080p mkv file, most of them are 23.976 fps. I've lot of 29 and mostly 25 fps mkv files. Hello, I'm new here and I want some suggestions from you guys here how to change an audio file (DTS, AC3 or AAC) to 23.976 fps. ![]()
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