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audio delay with mp4box - Doom9's Forum
https://forum.doom9.org/showthread.php?t=145435
audio delay with mp4box. Hello. I'm trying to add an audio delay to a file, but searching the forums I found differrent syntax : mp4box -add video.h264 -add audio.aac -delay 2=200 -new syntax_old.mp4. mp4box -add video.h264 -add audio.aac:delay=200 -new syntax_new.mp4. Both of these cmdlines execute correctly, but since no message is returned ...
gpac / Discussion / Open Discussion: MP4Box delay …
https://sourceforge.net/p/gpac/discussion/287546/thread/0c002cab/
MP4Box test.mp4 -delay 1=800 -out newfile.mp4 Saving to newfile.mp4: 0.500 secs Interleaving And I can put any delay in the file but the result is …
mp4box: MPEG-4 Systems Toolbox - Linux Man Pages (1)
https://www.systutorials.com/docs/linux/man/1-mp4box/
-delay [tkID=]delay_ms sets the delay in milliseconds of all tracks or the given track. LAN is the ISO 639-2 3 character code. ... MP4Box -add myfile.avi#audio mymp4.mp4 Import video from an AVI: MP4Box -add myfile.avi#video mymp4.mp4 Import an MP3 and leave data outside: MP4Box -dref -add myfile.mp3 mymp4.mp4 ...
How to add delay to .aac without re-encoding it? - VideoHelp
https://forum.videohelp.com/threads/383482-How-to-add-delay-to-aac-without-re-encoding-it
Best scenario would be if you could extract the audio with mp4box and set delay into the process, then you would get raw audio file with delay applied. MP4Box is an MP4 muxer and demuxer, it's not a dedicated stream editor. Quote 5th May 2017 09:40 #3 midts Member Apr 2017 I have eac3to, but doesn't it reencode it like ffmpeg ? Quote
How to add an additional Sound track to an ... - Ask Ubuntu
https://askubuntu.com/questions/317739/how-to-add-an-additional-sound-track-to-an-existing-video
MP4Box -new -add OriginalMovie.mp4 -add Track2.mp3#audio:delay=300 Output.mp4 Where MP4Box is the command to do this and yes it is capitalized The first -new will tell MP4Box a new file will be created. You could put this at the end like "-new Output.mp4" but I wanted to put it in the beginning. The first -add is to add the Original video file.
Video/audio out of sync during play · Issue #996 · gpac ...
https://github.com/gpac/gpac/issues/996
The audio stream instead does not suffer any delay. The result of the concatenation is a longer video stream than the audio stream. Adding the repetitions of the loop on MP4Box as -dash-live the delay increases (only on safari) and becomes noticeble after some repetitions (audio before video).
mp4box man page - gpac - General Commands | ManKier
https://www.mankier.com/1/mp4box
mp4box - Man Page. GPAC command-line media packager. Examples (TL;DR) Display information about an existing MP4 file: mp4box -info filename Add an SRT subtitle file into an MP4 file: mp4box -add input_subs.srt:lang=eng -add input.mp4 output.mp4 Combine audio from one file and video from another: mp4box -add input1.mp4#audio -add input2.mp4#video output.mp4 …
Fix Audio/Video Delay/Sync WITHOUT RE-ENCODING - …
https://www.youtube.com/watch?v=1QvPEwOjO1o
Fix video WITHOUT RE-ENCODING! Cameras, phones, software and people can cause video files to be opened incorrectly by video editing apps, making audio and vi...
Setting the language name in MP4 with mp4box [Archive ...
https://forum.doom9.org/archive/index.php/t-95700.html
mp4box -lang 1=eng -add video.avi -lang 2=fre -add audio_1.aac -lang 3=ger -add audio_2.mp4 output.mp4 This adds English for trackID=1 in the video stream, French for trackID=2 in audio_1 file and German for trackID=3. Another example with mp4 file (you need to know the trackID of your mp4 file to add the language track) :
MP4Box · gpac/gpac Wiki · GitHub
https://github.com/gpac/gpac/wiki/MP4Box
MP4Box can be used to repackage existing content to compliant ISO Base Media Files (MP4, 3GP, 3G2, OMA DCF). Note MP4Box prior to 0.9.0 does NOT re-encode audio, video and still image content, external tools shall be used for this purpose. With MP4Box 0.9.0 or above, MP4Box can be used in combination with encoding filters to transcode the content.
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