cat--->mp4 help please

[marcorocchini]

Hi please helpme,

I would like to transcode my cat into a .mp4 file with ffmpeg

In attachement my source:

cat.avi and cat.wav

Destination file have to match this parameters (is the mediainfo of anhother .mp4 that have the correct parameters):

General
Complete name : C:\Documents and Settings\Administrator\Desktop\pallanuoto.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 115 MiB
Duration : 1mn 55s
Overall bit rate : 8 346 Kbps
Encoded date : UTC 2011-09-04 07:54:50
Tagged date : UTC 2011-09-04 07:54:50

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.0
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=33
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 55s
Source duration : 1mn 55s
Bit rate mode : Variable
Bit rate : 7 814 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.754
Stream size : 108 MiB (94%)
Source stream size : 112 MiB (98%)
Language : English
Encoded date : UTC 2011-09-04 07:54:50
Tagged date : UTC 2011-09-04 07:54:50
mdhd_Duration : 115522

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1mn 55s
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 2.63 MiB (2%)
Language : English
Encoded date : UTC 2011-09-04 07:54:50
Tagged date : UTC 2011-09-04 07:54:50
mdhd_Duration : 115536

But possibly I can encode also in a better quality, best would be in 422. I need of a fine quality encoding, but not too big files because I have to transfer it via web.

What is the correct commandline to do this?

Thanks

[marcorocchini]

please help my cat !

[poisondeathray]

ffmpeg -i cat.avi -i cat.wav -c:v libx264 -pix_fmt yuv420p -profile:v main -level:v 3 -g 33 -bf 1 -crf 20 -flags +ildct+ilme -x264opts tff=1:ref=1 -c:a libvo_aacenc -b:a 192k out.mp4

1) main profile doesn't support 422. So you have to convert to 420, unless you want to change the profile

2) x264 (the only free AVC encoder), doesn't support PAFF , only MBAFF (the short explanation is you can think of it as a more advanced type of interlaced encoding) . So scan type will say "MBAFF", which is really a type of interlaced encoding

3) adjust the CRF value to your tastes (lower values = better quality, larger filesizes)

[El Heggunte]

cat--->mp4 help please

Here it goes, here it goes:

[marcorocchini]

ffmpeg -i cat.avi -i cat.wav -c:v libx264 -pix_fmt yuv420p -profile:v main -level:v 3 -g 33 -bf 1 -crf 20 -flags +ildct+ilme -x264opts tff=1:ref=1 -c:a libvo_aacenc -b:a 192k out.mp4

1) main profile doesn't support 422. So you have to convert to 420, unless you want to change the profile

2) x264 (the only free AVC encoder), doesn't support PAFF , only MBAFF (the short explanation is you can think of it as a more advanced type of interlaced encoding) . So scan type will say "MBAFF", which is really a type of interlaced encoding

3) adjust the CRF value to your tastes (lower values = better quality, larger filesizes)

MMMMMM thanks poison!

only 2 things: and if I would

1) encode (and keep) 4:2:2?
2) considering audio of the cat.wav a L and R separate chennels, can I keep alwais the same L+R .wav but I want panpot L in R and R in L so the destination .wav have alwais L+R but both have the same "monify" audio? (maybe the cat.wav is empty of audio, but I need to do this)

thanks!!!

[marcorocchini]

cat--->mp4 help please

Here it goes, here it goes:

grrrrrrrrrrrrrrrrrrrrrrrrrrrrr

[poisondeathray]

1) encode (and keep) 4:2:2?

Change the profile, -pix_fmt

ffmpeg -i cat.avi -i cat.wav -c:v libx264 -pix_fmt yuv422p -profile:v high422 -level:v 3 -g 33 -bf 1 -crf 20 -flags +ildct+ilme -x264opts tff=1:ref=1 -c:a libvo_aacenc -b:a 192k out422.mp4

2) considering audio of the cat.wav a L and R separate chennels, can I keep alwais the same L+R .wav but I want panpot L in R and R in L so the destination .wav have alwais L+R but both have the same "monify" audio? (maybe the cat.wav is empty of audio, but I need to do this)

I'm not sure what you're asking, and I don't know how to do this with ffmpeg. Maybe pipe to sox ?

[marcorocchini]

mmmm it seems work

[marcorocchini]

I'm not sure what you're asking, and I don't know how to do this with ffmpeg. Maybe pipe to sox ?

I mean this: my source is the attached source (and is in replacement of cat.wav for example)
I would like to encode in .mp4 so audio become as the attached dest.wav

so the audio channels are "merged"

^^ thanks

[poisondeathray]

I'm not sure what you're asking, and I don't know how to do this with ffmpeg. Maybe pipe to sox ?

I mean this: my source is the attached source (and is in replacement of cat.wav for example)
I would like to encode in .mp4 so audio become as the attached dest.wav

so the audio channels are "merged"

^^ thanks

I still don't understand

Did you want to mix L + R channels , but keep stereo channels ?

Maybe -vf pan?
https://www.ffmpeg.org/ffmpeg-filters.html#pan

[marcorocchini]

maybe yes, sorry, only now I have uploaded source.wav and dest.wav as example to understand :=)

they are uploaded 2 post over

[poisondeathray]

uhhhh sounds baaad

My ears hurt


It sounds like you have discrete L + R in the original stereo track. You want a 50/50 mix in both L + R in the output stereo track ?

ffmpeg -i source.wav -af "pan=stereo:c0<c0+c1:c1<c0+c1" output.wav

[marcorocchini]

uhhhh sounds baaad

I know, it sound bad but I have "extremized" thing to make me understand better. I am a cat. i'm not very practical with computers ^^