Ffmpeg copy audio bitrate mp4#

Its reencoding the videos and merging them to the specified output: In a previous version of ffmpeg i run this fully working example:

(videos merged without losing any quality in single file, and the order was filename ascending) (for %i in (*.mkv, *.avi, *.mp4) do file '%i') > mylist.txtįfmpeg -f concat -i mylist.txt -c copy output.mkv I've made first a list of my video files using this: You can make it with a single command line. I did some digging, concatating videos without have to re-encode can be done easily as found here.

Ffmpeg copy audio bitrate mp4#

Normaly I use VirtualDub tool to cut videos using Quick Time Plugin 2.6 loading mp4 videos.The good thing using this plugin is that I can cut videos and keeping the original audio stream.That pretty good.The disadvantage is that the plugin has some bad issues for the video stream what means frames are not same where there should be same.This is bad if you wanna cut exactly.Video handling bad / audio handling good.So to make a exact video cutting I need to load the video using FFmpeg input driver or Caching input driver (VirtualDub2) or DirectShow input driver so with these I get all video frames correctly to see without black frames or any other issues the QT plugin has.Problem with this drivers are the audio stream what needs to be encode and for that I wanna use FFmpeg as I told above but there I have that bitrate issues which dosent match.Maybe anyone could help to fix that issues. So my question is whether anyone knows some more specific commands I could use to get my desired constant audio bitrate out for acc codec? I just loaded a video in VirtualDub2 and using external encoders option where I can set commandline arguments.I just selected some video frames to encode from the beginning of the video and as result I got first a matching audio bitrate = good.Now I did selected some frames from the end of the video and did encode it and in this second file I got a audio bitrate which is higher.Ĥ4100Hz 128 kb/s tot (2 chnls) <- of first video partĤ4100Hz 129 kb/s tot (2 chnls) <- of second video part i -c:a libfdk_aac -b:a 128k -f mp4 -y '%(tempaudiofile)' I found a new problem using FFmpeg to encode some video / audio streams.My goal was it to encode some diffrent parts of one video out using same audio bitrate but as result I have the parts out with diffrent bitrates what means I can not merge this parts together but for this I need exact same audio bitrate (only for audio needed).Thats a problem so far.I tried already all diffrent ffmpeg commands without success.I am using audio codec aac (nativ).On internet I found some infos about using libfdk_aac instead of acc what I tried too (Internet I found a static compiled build version what has this codec included which is not present in normal builds).I tried this one now and it still dosent match.