![]() It happens when you open the iPhone videos in some applications, like Camera app, Photos app, or some Windows/Mac players. iPhone variable frame rate, which will become a problem when you use iMovie, Final Cut Pro, Adobe Premiere, etc, to edit video files shot and recorded by iPhone.But based on our researching and information collection from user's feedback and some iPhone forums, here are some common issues which can lead to iPhone video and audio out of sync. Reasons for iPhone sound issues may vary, and sometimes it's hard to identify the cause. Why Is My Audio and Video Out of Sync on iPhone You may see issues with audio not keeping up or being faster than the video editing iPhone footages in Adobe Premiere Pro, recording a game video on iPhone screen, playing and watching online streaming via YouTube, Instagram, etc. There are different types of iPhone out-of-sync audio problems. But, take it easy! Fixing the iPhone out-of-sync audio issue is not anything tricky with the help of a full-featured video converter – VideoProc Converter. So use -0.15 to compensate for that!įor NicoNico Douga, there’s no delay at all if you use the output from HandBrake.Summary: The iPhone video audio out of sync issues are quite common. It finally comes a time for me to produce a Twitter video, and it seems to delay an audio by 0.15 seconds. The audio is a little bit faster than what I viewed on PC. ![]() ![]() Note that a video from Android (which has .mp4 extension) is fine with Facebook. It seems to be 0.145 seconds if the video came straight from Premiere Pro with H264 encoding. From trial-and-error, I discovered that 0.18 seconds is a good value. So to counter that, you need to delay the audio on your video file. You can compare how this might matters in your video below.īefore compensation fix : (That is, in your computer it sounds correct but became wrong after uploading)Īfter the fix : (Now the clip in your computer have audio that is way too fast, but will be corrected in YouTube)Īlso, H.264 to Facebook seems to severely put the audio faster than expected. If yours match mine, probably the audio will be delayed by about 0.1 seconds in YouTube. Here is the metadata of that video, by the way. YouTube will delay back 0.1 seconds, resulting in the correct audio position like what you hear on your computer on your original file. This operation completes as soon after you press enter, because it does not re-render anything. You can use ffmpeg to fix it by make the audio come faster than the correct position with this command : ffmpeg -i input.mp4 -itsoffset -0.1 -i input.mp4 -map 0:v -map 1:a -vcodec copy -acodec copy delayed.mp4īasically this makes 2 streams, #0 is the original one and #1 is the modified one. Before uploading, I have really made sure that it is dead exact. ![]() For most video the 0.1 seconds delay is not that noticeable, but in these kind of clips, it became really apparent that the audio is off sync. I occasionally uploads YouTube videos of music games gameplay as a tribute to songs I like. (Exported from Premiere Pro with H.264 preset, then run through Handbrake) It probably will depends on codecs and other video’s structures, but from my trial-and-error experiment the delay is +0.1 seconds (you hear audio way after the picture) for H.264 .mp4 file.
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