1/7/2024 0 Comments Avidemux audio out of sync![]() Otherwise your audio will be out of sync. or 2) VLC / SMPlayer / UMPlayer as a "no fuss" alternative (not quite as good quality though IMHO). If you are editing a file with variable bitrate audio, run AudioBuild VBR Time Map before you do any editing. My recommended software combo for playback is either 1) Media Player Classic with CoreAVC for video, AC3Filter / FFDShow's audio component for audio and Haali Media Splitter for demuxing the streams at playback. Check the frame rate on the video and check the frequency on your audio. Both of those formats are far more efficient and can handle far more in terms of streams (subtitles, both converted and native vobsub, chapters, multiple audio streams and multiple video streams). Wherever possible, use MKV or MP4 to wrap your streams - MKVMerge for making Matroska files or MP4Box for MP4 files (YAMB is a very functional Windows GUI for MP4Box). If you're encoding with H.264, I would drop AVI altogether unless it's unavoidable for hardware format support reasons. Also, some software copes perfectly well with audio supplied at 48 kHz whereas 44.1 kHz audio tracks desync during playback (even if they're theoretically aligned perfectly in the file) due to bugs with MP3 support in the playback software and the AVI wrapper (it's all one big dirty hack AVI was never designed to support MP3 bitstreams, nor H.264). (All to do with timing from back in ye olde dayze). 48000 can be divided nicely into 24, 25 and 30. Golden rule for audio accompanying video tracks: make sure it's digitised and encoded at 48 kHz. It used to be commonplace for people to have to edit the framerate in VirtualDub (later VirtualDubMod) VDubMod provides a facility to adjust the video framerate to compensate for audio lag. ![]() I guess I sort of knew about splitting on i-frames and have ffmpeg but this sounds really useful.Ah, this used to be a notorious problem for people braving the new world of DivX -) 3.1 video with VBR MP3 audio tracks. Thanks for the sanity check on some of that! Why does some of this end up being so cryptic and the workflow feel kludgey? These files are always out of sync when played back using GStreamer. Especially on SSD drives, transcoding even large videos will only take a few seconds or minutes at max. AVI files generated by Acidrip (a frontend for MEncoder) use VBR MP3 by default. Muxing and transoding video not only spares you another recompression pass (and, thus, quality loss) but also speeds up the process by magnitudes since the media data is simply compied from source to target file. All these tools are essential - plus, of course, AVConvert Often, transcoding it into another container fixes this issue quickly and losslessly. There's also VideoContainerChanger which can losslessly transcode videos from one container format to the other in case a video does not poen as expected in some application. It is originally ALSA, and I know most instructions. Whenever possible, I import the video (of the final length!) into Reaper, prepare tha audio as desired, render only the audio and then use the third-party tools to losslessly "join" the untouched video with the new, edited audio.įYI, you can also use the free LosslessCut to make lossless video edits (cutting on i-frames is a lossless process if you can live with the reduced timing precision of up to one second). In Avidemux do Edit -> Preferences -> Audio (and change the Audio Output to Pulse Audio). ![]() Avidemux and mkvToolnix are essential tools in this regard (even - or especially - from a pro perspective, which may seem surprising for free tools). After processing, the outcome is out of sync. I used AVIDemux to append 3 VOB files, set the encoder as x265, added the filters, set the audio as 'Copy', hit save, and saved the file as whatever.avi. The audio is by itself delayed by 1-2 seconds. I've searched a long time to figure out how to keep video compression and the resulting degredation to a minimum during post. Hey guys, I have been having this wierd problem with AVIDemux.
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