Then I run the following to import the metadataįfmpeg -i test.m4a -i metadata -map_metadata 1 -codec copy new_file. List.txt is a simple file containing each filename in order file '01.mp3' I am using the following command to convert and merge from mp3 to m4a:įfmpeg -f concat -safe 0 -i list.txt -vn -y -b:a 64k -acodec aac -ac 2 test.m4a Create a new video, copying the video and audio from the original without re-encoding. confidently answer the review questions at the end of each chapter (Part. Run the helper script to append chapters to FFMETADATAFILE. 3) Download following file which contains all the zip files you will need to. ![]() Place FFMETADATAFILE, chapters.txt, and the video file in the same directory. Transport streams like MPEG-TS are one of the few formats which can be concatenated this way. ![]() Allows you to concatenate all the files from the list to one output. ![]() I've triple checked the times and all I can figure is the conversion is adding some extra time but I don't know how much and if i can somehow prevent it? Watch the video, noting chapters into a chapters.txt file as you go. The concat protocol is the wrong choice for most file formats. Also support writing direct ffmpeg command WITHOUT providing input and output ex. It almost seems like the process of converting and merging the files is putting a few second gap between each file. I have a script that reads the time value of each file and created the metadata file for import via ffmpeg but after about the 5th file it starts drifting further off into the previous chapters ending time. I am trying to automate some conversion of mp3 files (1 per chapter) into m4a (then m4b) format.
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