Michael Rampe
Forum Replies Created
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seeing that the footage is already H.264 and AAC, you could simply repack the media into a different container.
$ ffmpeg -i input.ts -vcodec copy -acodec copy output.mkv
But this will not make it smaller…..
The reduce the size as well, try:
$ ffmpeg -i input.ts -vcodec libx264 -preset slow -b 5000k -acodec libfaac -ab 192k output.mkv
This should make it about a third of the size of the original which reports at around 15000k.
Michael
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Michael Rampe
September 22, 2011 at 10:45 pm in reply to: converting series of images to a video slideshow[C David Young] “What does your output look like? Does it dwell for a second or two on each image? What OS are you running? Which player are you using?
“OK. I dug a little further….
I split a movie into files for testing and then reassembled with your code.
When I tried to change the frame rate, I got the same bug as you.
I fixed this by putting the -r 1 BEFORE the input.
Now I get one frame playing per second.$ ffmpeg -y -f image2 -r 1 -i test-%03d.jpg -s 720×480 a.mp4
FYI: OSX 10.7, QT/VLC
Michael
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Michael Rampe
September 22, 2011 at 9:35 pm in reply to: converting series of images to a video slideshow[C David Young] “Well, for one thing it only seems to be adding the first image,”
Are your images are *definitely* named IMAG-001.jpg. IMAG-002.jpg, IMAG-003.jpg …etc?
I tired your line with a series of images named this way and it works…. so not sure otherwise….
Michael
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Michael Rampe
September 22, 2011 at 8:41 pm in reply to: converting series of images to a video slideshow[C David Young] “(ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi) but am not having much luck.”
What is going wrong?
Michael
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[Luiz Guilherme Louro] “I need to convert a video in .ts to .avi, anyone knows how to do it with ffmpeg?
“Depends what you wish to do with it and what your source is…..
For source: post results from $ ffmpeg -i file.ts
What codecs do you want for your avi? Is there audio involved as well?
More information needed.Michael
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[Aamir Shahzad] “Hi, my script creating this command but it is giving error.”
what error?
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[Donald Ortiz] “How can i convert mp41 to mp42 with ffmpeg?”
I had a look into this and found that it is an incompatible microsoft variant of mpeg4.
FFmpeg supports these types:
DEVSD msmpeg4 MPEG-4 part 2 Microsoft variant version 3
D VSD msmpeg4v1 MPEG-4 part 2 Microsoft variant version 1
DEVSD msmpeg4v2 MPEG-4 part 2 Microsoft variant version 2NOTE: the second one does not support encoding
I tried msmpeg4v2 and it created an unplayable file for me… but I am on Mac….
For mov, it reported:
[mov @ 0x7fcd0204d800] Using MS style video codec tag, the file may be unplayable!
For mp4 it failed:
[mp4 @ 0x7fe35c04d800] track 0: could not find tag, codec not currently supported in containeranyway, have a tinker and see if you can get the desired result….
-vcodec msmpeg4v2Michael
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[atish kathpal] ” can we transcode a single file as user defined chunks of equal/variable size?”
yes but you will have to run one command for each chunk.
-t is a time offset
specified seconds or hh:mm:ss[.xxx]-ss is the length to encode
specified seconds or hh:mm:ss[.xxx]
This option behaves differently if put before or after the -i [input]
Before:seeks to nearest I frame before converting (fast but inaccurate)
After:seeks through every frame until target is reached (slow but accurate)So:
first chunk: -t 0 -ss 60
second chunk: -t 60 -ss 60
third chunk: -t 120 -ss 60
…..etc.Michael
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Michael Rampe
September 22, 2011 at 8:06 pm in reply to: I have a strange error using custom commands[Bleck Higel] “ffmpeg.exe -vcodec libx264 -b 1024 -aspect 16:9 -bt 1024 -maxrate 1024 -minrate 1024 -pass 1 -acodec libfaac -ac 2 -ar 44100 -ab 64k -i %1 video.mp4”
try 1024k instead of 1024, This is measured in bits so 1024 is 1k which is far too low.
Michael
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[David Graham] “Can you spot what is wrong?”
looks like the profile is not supported.
I read here: https://developer.android.com/guide/appendix/media-formats.html
that baseline profile is the only supported option. Pity.Michael