[Jack Passmore]

I finally got my hands on a linux box and this works great. I still need to figure out the syntax for .bat but many thanks!

[Jack Passmore]

Thanks,
Is this bash? It doesn’t seem to work in my windows shell.
J

[Jack Passmore]

Apologies, so I want to concatenate the two (join one after the other – they are hours one and two of a two hour program). Here’s the -i output

D:\Local_Audio\ffmpeg\bin>ffmpeg -i NYAC-1234-A.wav -i NYAC-1234-B.wav -i NYAC-3
456-A.wav -i NYAC-3456-B.wav

ffmpeg version N-56254-gb7bd688 Copyright (c) 2000-2013 the FFmpeg developers
built on Sep 12 2013 21:00:14 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264
--enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 43.100 / 52. 43.100
libavcodec 55. 31.101 / 55. 31.101
libavformat 55. 16.102 / 55. 16.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 84.100 / 3. 84.100
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'NYAC-1234-A.wav':
Metadata:
genre : Unknown
album : Album 02107D01
date : 0000
Duration: 01:10:21.65, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16
, 1411 kb/s
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, wav, from 'NYAC-1234-B.wav':
Metadata:
genre : Unknown
album : Album 32110904
date : 0000
Duration: 01:12:41.03, bitrate: 1411 kb/s
Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16
, 1411 kb/s
Guessed Channel Layout for Input Stream #2.0 : stereo
Input #2, wav, from 'NYAC-3456-A.wav':
Metadata:
genre : Unknown
album : Album 020FB801
date : 0000
Duration: 01:07:04.05, bitrate: 1411 kb/s
Stream #2:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16
, 1411 kb/s
Guessed Channel Layout for Input Stream #3.0 : stereo
Input #3, wav, from 'NYAC-3456-B.wav':
Metadata:
genre : Unknown
album : Album 02100901
date : 0000
Duration: 01:08:25.57, bitrate: 1411 kb/s
Stream #3:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16
, 1411 kb/s
At least one output file must be specified

[Jack Passmore]

Great thanks,

This seems to work except for some of the videos where I get an error message and I’m not sure why. Maybe the first pass is dropping frames or something?

[libx264 @ 0x10181f400] 2nd pass has more frames than 1st pass (25082)bits/s ts/s
[libx264 @ 0x10181f400] continuing anyway, at constant QP=28
[libx264 @ 0x10181f400] disabling adaptive B-frames

[Jack Passmore]

Thank you! This is very helpful….
Jack

[Jack Passmore]

Thank you!
You are making me think the problem is with my initial project presets. Even though the video is 1920×1080 (the image is a 4:3 pillarboxed image), should my presets for the project be NTSC – DV > Standard 48khz? That way, when I import the 1920×1080 asset, I can manually scale it down using Effect/Distort/Transform to fit the NTSC – DV preset. I was using project presets that matched the specs of the original file. Instead should I use presets that more closely match my desired project output?

Are the videos letterboxed or pillarboxed?
Either way, uncheck “fit to scale” and do the resize manually with Effect/Distort/Transform.
At export, make sure to change Recompress: Maintain Data Rate to Recompress: Always.

I like to control every setting I can.
Make sure you’re in a Full Screen DV project file. If you’re not, just create one and import your original project into it.
I think “fit to scale” might be a default, but I wouldn’t recommend using it. It just uses basic rendering to proportionately scale whatever you drop into the timeline, so it fits in the projects dimensions.
Effect/Distort/Transform resizes with a higher quality.

This is all assuming you don’t need to deinterlace anything.

Vince

[Jack Passmore]

Awesome, it works. Apologies for my typos! Now I just have to find the correct h264 presets for decent web viewing.
Cheers,
John

[Jack Passmore]

Hi Michael,

You are correct I wasn’t getting a 640×480 image, I must have left that out. I was unaware of the -vf command, so thank you. However, I’m still having some problems.

This command will change the 1920×1080 letterboxed video to a 1140×1080 4:3 video correctly:

ffmpeg -i video.avi -vf “crop=240:0:1440:1080” video_crop.mp4

But when go back to the original file and try to also scale the image, it creates a 640×480 image that is stretched vertically and letterboxed:

ffmpeg -i video.avi -vf “crop=240:0:1440:1080” -vf “scale=640:480” video_crop_resize.mp4

I can’t figure out why I’m not getting a 4:3 630×480 video file without letterboxing…