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I'm new to bash scripting. I need to find a way of joining .wav's and .mp4's (they are of same length) together as there's about a thousand files I need to go through.

Any suggestions and possible examples I could try? There's probably too many ways of doing this, I looked at avconv as it seemed simple to use, but open to other suggestions (vlc, ffmpeg?)

Also saw this ffmpeg script for a single file:

https://superuser.com/questions/277642/how-to-merge-audio-and-video-file-in-ffmpeg

The original video and audio file names would be identical except for extension.

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The following should be equivalent.

for filename in *.mp4; do
    stub="${filename%.*}"
    ffmpeg -i "${stub}.wav" -i "${stub}.mp4" -acodec copy -vcodec copy "newfiles/${stub}.avi"
done
  • The script is in the same folder as all files, but I'm getting ".wav: No such file or directory" after running it. I tried adding a full directory path to the first line without any success: for filename in "/some/path/.mp4"; do – Jonesints Sep 21 '15 at 11:46
  • I figured out that taking the inverted commas from *.mp4 on the first line fixes this issue. I now get an encoding error: 'Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input' here's the full output: pastebin.com/nZA7kFD0 Any suggestions? – Jonesints Sep 21 '15 at 17:24
  • I'm stuck making progress, with for filename in *.mov; do stub="${filename%.*}" /usr/local/Cellar/ffmpeg/2.8/bin/ffmpeg -i movs/"${stub}".mov -i m4a/"${stub}".m4a -vcodec copy -acodec copy -map 0:0 -map 1 MERGED_VIDEOS_MOV/"${stub}.mp4" done I just get movs/.mov: no such file or directory. I'm pretty certain it's to do with the way ffmpeg is handling escaping, but I've tried pretty much everything! – Jonesints Sep 30 '15 at 11:47
  • That suggests "${stub}" is being replaced with nothing. Remove the ffmpeg line and just try echoing out all the values of $stub and see if you can see the problem there. – Oli Sep 30 '15 at 12:22
  • echoing $stub lists the following MERGED_VIDEOS_MOV MERGED_VIDEOS_MP4 batch_process_join_wav_mov.sh batch_process_join_wav_mp4.sh m4a movs – Jonesints Sep 30 '15 at 12:46

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