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lukehedger/ffmpeg-compress-mp4

Last active May 28, 2025 22:43
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Compress mp4 using FFMPEG
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ffmpeg-compress-mp4
$ ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4
@somaGFX
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somaGFX commented Mar 27, 2025

does anyone know why I do not get any audio when I use ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4 or ffmpeg -i input.mp4 -vcodec h264 -acodec mp3 output.mp4?

I found a solution that works with ffmpeg -i input.mp4 -vcodec h264 -acodec copy output.mp4 but it does not solve the problem with the audio converting and I would really like to know what's the problem with the audio

tbh I got a pretty niet 650M file out of 2.7G

@kfnx
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kfnx commented Apr 25, 2025

ffmpeg -i video.MOV -c:v h264 -c:a aac -strict -2 -pix_fmt yuv420p -q:v 0 video.mp4
I convert mov to mp4 and the result is good enough: 985 mb -> 358mb

ffmpeg -i video.mp4 -vcodec libx264 -crf 23 -preset medium -acodec aac -b:a 128k video-compressed.mp4
Next i want to compress it, got: 360 mb -> 302 mb

ll video*
-rw-r--r-- 1 kafin kafin 986M Apr 25 10:17 video.MOV
-rw-r--r-- 1 kafin kafin 360M Apr 25 10:29 video.mp4
-rw-r--r-- 1 kafin kafin 302M Apr 25 10:44 video-compressed.mp4

@tristanz1313
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Great discussion ! By the way if you want some dvd processing tools, theses one are highly recommanded. https://dvdfab.fr/uhd-copy.htm https://dvdfab.fr/dvd-copy.htm

Free YouTube to Mp3 Converter Online: ytmp3.love

@JeffersonTan
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Wouldn't it be much easier to use video compressor software? There are quite a few wonderful and high quality video compressors out there.

ffmpeg is video compression software (among many other things), as far as I can tell the only difference is that you run it from a command line instead of a GUI, and it's free.

I think you replied to a bot lol

@Lucifer-Francessa
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http://v-y2mate.com/
With the useful tool in converting videos from YouTube to MP3 forms

@Dinesh6777
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Dinesh6777 commented May 24, 2025 •
edited
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Here is the format using latest encoding algorithms h265 and mp3. It's around 15% better than h264.

  • Good quality(reasonable)
    • ffmpeg -i input.mp4 -s 1280x720 -c:v libx265 -preset medium -acodec libmp3lame -y output.mp4
    • 2.45 GB 131MB
  • For Best quality remove scaling paramater "-s"
    • ffmpeg -i input.mp4 -c:v libx265 -preset medium -acodec libmp3lame -y output.mp4

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