about concat, thanks a lot

[lwx2004]

Today I used jave2 to try to process audio files, such as merging two mp3 files. The version I used is 3.2.0. Oh my god, it actually provides a closed method to merge multiple files. I tried it and it didn’t work. The output file only contains one file data in the source file I specified. I took a look at the generated ffmpeg command, which did not contain concat but multiple -i parameters. But I took a look at earlier versions, such as 2.7.3, which included the concat statement when creating the ffmpeg command. Is this a bug? thanks

[a-schild]

Could you please provide some more infos on this?
For example the command lines generated in both versions?

[naffan2014]

can you concat videos in 3.2.0? @a-schild

i solve concat by myself . for example

/var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/jave/ffmpeg-x86_64-3.2.0-osx -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631012050_1631012052_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631012476&21364_1631012052.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631012352_1631012355_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631013449&21364_1631012355.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631012655_1631012657_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631013430&21364_1631012657.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631012957_1631012959_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631013467&21364_1631012959.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631013259_1631013261_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631014427&21364_1631013261.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631013561_1631013564_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631014391&21364_1631013564.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631013864_1631013866_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631014409&21364_1631013866.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631014166_1631014168_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631015351&21364_1631014168.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631014468_1631014471_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631015404&21364_1631014471.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631014771_1631014773_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631015369&21364_1631014773.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631015073_1631015075_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631015386&21364_1631015075.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631015375_1631015377_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631016311&21364_1631015377.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631015677_1631015680_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631016329&21364_1631015680.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631015980_1631015982_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631016347&21364_1631015982.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631016282_1631016284_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631017248&21364_1631016284.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631016584_1631016586_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631017211&21364_1631016586.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631016886_1631016889_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631017230&21364_1631016889.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631017189_1631017191_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631018808&21364_1631017191.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631017491_1631017493_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631018772&21364_1631017493.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631017793_1631017795_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631018790&21364_1631017795.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631018095_1631018098_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631018754&21364_1631018098.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631018398_1631018400_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631018832&21364_1631018400.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631018700_1631018702_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631019991&21364_1631018702.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631019002_1631019004_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631020009&21364_1631019004.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631019304_1631019307_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631019954&21364_1631019307.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631019607_1631019609_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631019972&21364_1631019609.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631019909_1631019911_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631021183&21364_1631019911.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631020211_1631020214_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631021211&21364_1631020214.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631020514_1631020516_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631021239&21364_1631020516.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631020816_1631020818_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631021154&21364_1631020818.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631021118_1631021120_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631022354&21364_1631021120.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631021420_1631021423_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631022409&21364_1631021423.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631021723_1631021725_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631022391&21364_1631021725.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631022025_1631022027_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631022373&21364_1631022027.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631022327_1631022329_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631023590&21364_1631022329.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631022629_1631022632_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631023572&21364_1631022632.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631022932_1631022934_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631023554&21364_1631022934.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631023234_1631023236_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631023611&21364_1631023236.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631023536_1631023539_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631024812&21364_1631023539.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631023839_1631023841_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631024791&21364_1631023841.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631024141_1631024143_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631024755&21364_1631024143.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631024443_1631024445_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631024773&21364_1631024445.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631024745_1631024748_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631026012&21364_1631024748.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631025048_1631025050_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631025955&21364_1631025050.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631025350_1631025352_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631025991&21364_1631025352.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631025652_1631025655_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631025973&21364_1631025655.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631025955_1631025957_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631027185&21364_1631025957.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631026257_1631026259_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631027204&21364_1631026259.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631026559_1631026561_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631027155&21364_1631026561.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631026861_1631026864_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631027167&21364_1631026864.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631027164_1631027166_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631028356&21364_1631027166.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631027466_1631027468_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631028396&21364_1631027468.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631027768_1631027771_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631028419&21364_1631027771.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631028071_1631028073_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631028379&21364_1631028073.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631028373_1631028375_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631029591&21364_1631028375.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631028675_1631028678_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631029556&21364_1631028678.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631028978_1631028980_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631029575&21364_1631028980.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631029280_1631029282_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631029609&21364_1631029282.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631029582_1631029585_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631111270&21364_1631029585.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631029885_1631029887_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631111250&21364_1631029887.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631030187_1631030189_2.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631111296&21364_1631030189.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/ANNULL/annullsrc_9_1631030489_1631030492_3.mp4 -i /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/STORAGE/1_1631111283&21364_1631030492.mp4 -filter_complex 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-vcodec h264 -channels 1 -b:v 1000K -ar 16000 -acodec aac -b:a 96K -r 60 -movflags faststart -threads 2 -y /var/folders/2y/jqhn24qs34sb1699gcdrdr_h0000gn/T/bk-tv-quality-processor/9/CONCAT/concutWithAnnullVideo_1635845265338_9.mp4 -hide_banner -loglevel quiet

[a-schild]

I think we need to have two different concat versions.
One for concating identical media files, as you use above (And was default in pre 3.2.0)
And a second one including scaling/reencoding to concat different media formats

[a-schild]

3 different cases to handle:
https://trac.ffmpeg.org/wiki/Concatenate

[naffan2014]

i have wrote an article about my best practice about ffmpeg concat solution . there indeed three defferent method to concat.if you have interesting in concat ,u can read my articel. but it is in chinese

[lwx2004]

3 different cases to handle: https://trac.ffmpeg.org/wiki/Concatenate

Sorry, I’m busy with other things recently, I’m going to test the parameters generated by the two versions now

[lwx2004]

Could you please provide some more infos on this? For example the command lines generated in both versions?

version 2.7.3
ffmpeg -i concat:D:\test\test2.mp3|D:\test\test1.mp3 -vn -acodec copy -ab 320000 -ac 2 -ar 44100 -y D:\test\combine.mp3

version 3.2.0
ffmpeg -i D:\test\test2.mp3 -i D:\test\test1.mp3 -vn -acodec copy -ab 320000 -ac 2 -ar 44100 -y D:\test\combine.mp3