Compress mp4 using FFMPEG

ffmpeg-compress-mp4

$ ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4

It increased the size instead of descreasing ?

Worked well for me, from ~67MB to ~14MB. Thanks!

Edit: Appears to not play in IE. Blast.

Compressed from 14.1 mb to 4.9 mb. But lost sound( how can i fix it? Any options?

@ankurhora This code basically does transcoding, hence if the input video is already compressed, the output video could be larger than the input one. To achieve compression, we can reduce the bit rate. Look at the code here https://gist.github.com/ksharsha/b06d184391290bc3b87fdadadb73c5bc#file-ffmpeg-compress

@BeetLab I faced the same problem. Changing -acodec mp2 to -acodec mp3 did the trick for me.

ffmpeg -i input.mp4 -vcodec h264 -acodec aac output.mp4 brought mine from 86457565 Bytes > 17195361 Bytes ~17MB ...wow, quality is really not even noticeably different. Thank you. -acodec mp3 was slightly smaller at 17195155. Now I'm looking to get my webm file down in size, hoping in a similar way.

@TryTryAgain It works pretty well, and do it twice can compress more.

It compress from 450 MB to 60 MB!
This is amazing.
But what is the thing that this command remove? Since I can't find any difference. Is the bitrate decreased?

worked great, from 294 MB to 46.7 MB and still good quallity

Thanks!

Worked not expected.. I used 68.5Mb and get 65 MB ..

Thanks!

220 MB to 21MB

coder moment

163mb to 60mb. This worked

5Gb mov file (from after effects) downgraded to 250 Mb. Perfect!

De 1.06 GB a 229 MB. Genial!

I tried to have the same code but doing the bulk compress but it didn't work anyone can help?'

for %%a in ("*.mp4") do ffmpeg -i "%%a" -i vcodec h264 -b:v 700k -acodec mp3 "FB\%%~na.mp4"

try:

for %%a in ("*.mp4") do ffmpeg -i "%%a" -vcodec h264 -b:v 700k -acodec mp3 "FB%%a~na.mp4"

Worked as expected

ffmpeg -i input.mp4 -vcodec h264 -acodec aac output.mp4

Before 32.8 MB

After 6.8 MB

4,40 GB to 3,84 GB... I expected better.

Woah, 300mb to 8mb

I have 33MB and it command do a file more big...

3.2gb to 320mb. And quality difference is very hard to see!

ffmpeg -i input.mp4 -vcodec libx265 -acodec aac -crf 23 output.mp4

Did the trick for me.

Before 400 mb

After 150 mb

ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4

Before : 124,2 mb

After 113,4 mb 👎

Its not work for me, I want reduce an webm video and 616mb to 480mb and very time spended =/

Here 14,9mb to 2,9mb - 00:56 yuv420p 480x480

Worked! Thanks a lot

used ffmpeg -i input.mp4 -vcodec h264 -acodec aac output.mp4
Before 738MB
After 192MB
with no quality loss + flawless sound!

Worked. Before: 1.6 MB. After: 132 KB. However, it doesn't work on videos with a width or height that is not divisible by 2. Not a big issue though.

Great!!

I tried compressing following this thread: https://gist.github.com/ksharsha/b06d184391290bc3b87fdadadb73c5bc

ffmpeg -i video.mp4 -vcodec h264 -b:v 1000k -acodec mp3 output.mp4

and went from 1.1 GB to 69 MB!!!

So, first all thanks to the developers and coder. I've been using FFMPEG with the Sick Beard MP4 automator and it's working beautifully! Now as I'm watching it work, I wish I could shrink the file size down when it auto converts. So, I stumbled upon this thread. i am a total noob to all of this so forgive my ignorance, but where do I add this script to make FFMPEG compress as the automator is working? I'm running Sonarr, Radarr, SabNZBd, and of course the Sick Beard MP4 Automator scripts.

Thanks in advance and again sorry for my ignorance if this is a totally stupid question!

try:

for %%a in ("*.mp4") do ffmpeg -i "%%a" -vcodec h264 -b:v 700k -acodec mp3 "FB%%a~na.mp4"

Does it work?

27 GB -> 9.56 GB 👍

with mp3 as audio codec 832MB -> 53.1MB
thanks a lot!

Great
from 274 to 36
Thanks
(But changed mp2 to mp3)

I guess this works great for large size videos. I got my video from 750 mb to 57 mb. Thanks.

This is legit! Thanks!

pls how do i impliment this

Try this:
ffmpeg -i input.mp4 -c:v libx265 -preset veryfast -tag:v hvc1 -vf format=yuv420p -c:a copy output.mp4

or this if you want to decrease the resolution and bitrate, it should be much more smaller than above:
ffmpeg -i input.mp4 -c:v libx265 -preset veryfast -tag:v hvc1 -b:v new_bitrate -vf scale=new_width:new_height,format=yuv420p -c:a copy output.mp4
e.g. ffmpeg -i input.mp4 -c:v libx265 -preset veryfast -tag:v hvc1 -b:v 800k -bufsize 1200k -vf scale=1080:1920,format=yuv420p -c:a copy output.mp4

of course, you can decrease the bitrate of audio stream either:
ffmpeg -i input.mp4 -c:v libx265 -preset veryfast -tag:v hvc1 -b:v 800k -bufsize 1200k -vf scale=1080:1920,format=yuv420p -b:a 128k output.mp4

If your device does not support h265, just change the -c:v libx265 into -c:v libx264 and remove the -tag:v hvc1.

This worked really well for me, made my videos much smaller and the quality was still comparable.

However, I'm curious if you could expand on how the "h264" line is compressing? Is it using a default CRF level? I found that instead compressing using "libx264 -crf 10" produced a MUCH larger video.

Worked! Thanks a lot

used ffmpeg -i input.mp4 -vcodec h264 -acodec aac output.mp4
Before 738MB
After 192MB
with no quality loss + flawless sound!

Thanks for sharing this trick! Worked for me as well. I had one video file successfully compressed to 253.9MB from 950.1MB.

updated version

But using 'ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4' it reduced to 105MB which is much better.

top 👍

711M input.MP4
101M output.mp4
Awesome (y)