FFMPEG: convert HDtoIMX and viceversa

[marcorocchini]

Hi cats

please consider this 2 interlaced source

one HD (xdcamhd422): https://www.dropbox.com/s/bewed3s3zxhouzk/HD.MXF?dl=0

one IMX(SD)(imx50): https://www.dropbox.com/s/5jd9run51moczxh/imx.mxf?dl=0

for example I try to convert the HD.MXF into a IMX-SD .MXF file but with this commandline pipe with ffmpeg/ffmbc:

ffmpeg -i v:\ffmpeg\HD.MXF -vf scale=720:576,interlace -f rawvideo -vcodec rawvideo -an - | ffmbc -y -f rawvideo -s 720x576 -r 25 -tff -i - -i v:\ffmpeg\HD.MXF -target imx50 outputIMX.mxf

but I get errors



How can I resolve?

Can I use ffmpeg/ffmbc also to convert the IMX one into HD?

audio channels/maps are different for the 2 files

thanks

[poisondeathray]

1) It looks like you have 2 -i in the piped output commandline.

2) Interlaced scaling flag is interl=1, not "interlaced"
-vf scale=720:576:interl=1

3) You need to specify -pix_fmt yuv422p for both pre and post pipe

This commandline was already posted in your a few of your other threads. I thought cats have good memory?

[marcorocchini]

because cats have 4MB or ram ^^

ffmpeg -i v:\ffmpeg\HD.MXF -vf scale=720:576:interl=1 -f rawvideo -pix_fmt yuv422p -an - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -tff -i - -target imx50 outputIMX.mxf

this work but outputIMX.mxf don't have audio, is there a way to pick audio directly from the HD.mxf?

[poisondeathray]

why are you piping ?

ffmbc's IMX50 D/10 muxer only supports 1 audio track, so you might be able to combine them all to a single 8ch

[marcorocchini]

because seems that ffmpeg don't take file playable in Sony cameras/deck. MXF files outputted by ffmpeg seems regular, but is not playable. Only ffmbc generate mxf playable on Sony PDW-700, PDW-F800 and PDW-HD1500

[poisondeathray]

Why don't you use ffmbc directly? Why pipe ffmpeg to ffmbc ?



IMX50 specs only support 16bit audio when in 8ch configuration.

There is no need to pipe for what you are doing, you can use ffmbc directly (interlaced downscale, 8 mono to single 8ch, IMX50 encoding)

ffmbc -i hd.MXF -vf scale=720:576:interl=1 -acodec pcm_s16le -ar 48000 -map_audio_channel 0:1:0:0:1:0 -map_audio_channel 0:2:0:0:1:1 -map_audio_channel 0:3:0:0:1:2 -map_audio_channel 0:4:0:0:1:3 -map_audio_channel 0:5:0:0:1:4 -map_audio_channel 0:6:0:0:1:5 -map_audio_channel 0:7:0:0:1:6 -map_audio_channel 0:8:0:0:1:7 -target imx50 outputIMX.mxf

[poisondeathray]

I forgot - you should use colormatrix 709 to 601 too , when downscaling. This was already covered in your other thread(s)

[marcorocchini]

Why don't you use ffmbc directly? Why pipe ffmpeg to ffmbc ?


[/code]

if I don't mistake, because ffmbc don't "concatenate"

[poisondeathray]

I don't understand, you have 1 file - what is there to concatenate?

If you want to concatenate multiple files, use ffmpeg, then use that output as a single input into ffmbc in a 2nd step. You can't concatenate and pipe at the same time anyways

[marcorocchini]

Ahn sorry, think I'm a confused cat :=)

[marcorocchini]

ffmbc -i hd.MXF -vf scale=720:576:interl=1 -acodec pcm_s16le -ar 48000 -map_audio_channel 0:1:0:0:1:0 -map_audio_channel 0:2:0:0:1:1 -map_audio_channel 0:3:0:0:1:2 -map_audio_channel 0:4:0:0:1:3 -map_audio_channel 0:5:0:0:1:4 -map_audio_channel 0:6:0:0:1:5 -map_audio_channel 0:7:0:0:1:6 -map_audio_channel 0:8:0:0:1:7 -target imx50 outputIMX.mxf

nice line, for kindness poison is there a way to have image a little less "soft", a little more detailed? maybe is only question to set the lanczos as resizer alghoritmh? but I don't know how to say to ffmbc use lanczos

[poisondeathray]

It's posted in your other thread, flags=lanczos

-vf scale=720:576:interl=1:flags=lanczos

[marcorocchini]

I have try over another HD file (C0094.mxf) but it is the same, strangely I get an error using

ffmbc -y -i C0094.MXF -vf scale=720:576:interl=1:flags=lanczos -acodec pcm_s16le -ar 48000 -map_audio_channel 0:1:0:0:1:0 -map_audio_channel 0:2:0:0:1:1 -map_audio_channel 0:3:0:0:1:2 -map_audio_channel 0:4:0:0:1:3 -map_audio_channel 0:5:0:0:1:4 -map_audio_channel 0:6:0:0:1:5 -map_audio_channel 0:7:0:0:1:6 -map_audio_channel 0:8:0:0:1:7 -target imx50 C0094outputIMX.mxf

maybe a sintax error?

[poisondeathray]

-sws_flags lanczos

[marcorocchini]

ffmbc -y -i C0104.MXF -vf scale=720:576:interl=1,colormatrix=bt709:bt601 -sws_flags lanczos -acodec pcm_s16le -ar 48000 -map_audio_channel 0:1:0:0:1:0 -map_audio_channel 0:2:0:0:1:1 -map_audio_channel 0:3:0:0:1:2 -map_audio_channel 0:4:0:0:1:3 -map_audio_channel 0:5:0:0:1:4 -map_audio_channel 0:6:0:0:1:5 -map_audio_channel 0:7:0:0:1:6 -map_audio_channel 0:8:0:0:1:7 -target imx50 C0104IMX.mxf

I have try this on another xdcam422 file

https://www.dropbox.com/s/689p158dm1xqetu/C0104.MXF?dl=0

but I see alwais that image is slightly "vibrating", I don't know why but is well visible on a crt monitor

[poisondeathray]

I haven't looked at it - But it's probably because it's too sharp, use a softer resize and lowpass (see your other thread(s). Again.)

Sharp = bad for interlaced material

[marcorocchini]

the problem is present also without the -sws_flags lanczos , it's difficult to see it without a crt monitor but is visible, maybe a tff/bff setting?

I post another original xdcamhd422 file

https://www.dropbox.com/s/utp5oe5t7sudjrj/C0016.MXF?dl=0


I have try add

-tff

but the problem remains

also tryed using -bff but nothis, the "vibrating" remains

[poisondeathray]

I see it.

It's because it wasn't smart bobbed , you have field offset of even/odd fields, so up/down motion or as you describe "vibrating"

You can use one of the avisynth methods. Other option in ffmpeg would be to yadif double rate, soft resize, low pass and resize, reinterlace

Several variations of these methods were covered in your other thread(s)

[marcorocchini]

in ffmpeg, but using ffmbc can I "deinterlace, resize, re-interlace"? in other threads was using alwais ffmpeg, seems not ffmbc :=(

[poisondeathray]

You should be able to. The newer compiled version of ffmbc has a newer libavfilter version. So you have access to yadif, scale, tinterlace

[marcorocchini]

where is downloadable?

[poisondeathray]

el_heggunte compiled and posted it at videohelp somewhere use <search>

Even if you can't do it with ffmbc, you could pipe ffmpeg to ffmbc, or avisynth to ffmbc, like in your other thread

[marcorocchini]

ok but if I pipe ffmpeg into ffmbc, audio can be processed in one unique commanline?

[poisondeathray]

Yes you can - use multiple inputs into ffmbc

The pipe in from ffmpeg will be 1st, the native mxf video (only interested in the audio) will be 2nd . You have to adjust the map_audio_channel to reflect this, because it will be taken from 2nd input now. So if you put the pipe first, it will be "0" , and the mxf will be "1". The order matters

So if you wanted to use -vf interlace instead of tinterlace, you could use ffmpeg to pipe to ffmbc (ffmbc doesn't have -vf interlace, only tinterlace). Recall in the other thread -vf interlace vs. -vf tinterlace and the low pass? You didn't like either method IIRC, and eventually went with avisynth

[marcorocchini]

mmm

ffmpeg -i HD.mxf -vf crop=1440:1080:240:0,yadif=1:0,scale=720:576,colormatrix=bt709:bt601,interlace -pix_fmt yuv422p -an -f rawvideo - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -tff -target imx50 -aspect 16:9 outputIMX.mxf

maybe this? but this don't have any audio at the output

[poisondeathray]

No, you need 2 inputs for ffmbc, 1 for the video pipe, 1 for the mxf which provides the audio. You have to change the map_audio_channel to reflect that the 2nd input is providing the audio

ffmpeg -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i C0104.MXF -vf colormatrix=bt709:bt601 -acodec pcm_s16le -ar 48000 -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 OUTPUT.mxf

[marcorocchini]

Now audio appear but I see persist the vibrating problem
and a "broken pipe" at the end of encoding



the colormatrix line is doubled, however also with this, the problem of vibrating remains (and also the broken pipe error)

ffmpeg -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i C0104.MXF -acodec pcm_s16le -ar 48000 -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 OUTPUT.mxf

However the ffmpeg don't vibrate, seems ok:

V:\brisighella>ffmpeg -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -pix_fmt uyvy422 -c:v rawvideo -an outputavi.avi

[poisondeathray]

For some reason, the colormatrix works alone with ffmpeg, but not when piped through. I think there is a double conversion. If you leave it for ffmbc, not for ffmpeg, the colors are correct (ie. erase the 1st colormatrix instance with ffmpeg) . If you use only colormatrix ffmpeg through the pipe, colors are wrong

The broken pipe message is a false alarm; it's because it doesn't know which video you are applying the filter to. Add -map 0:0 after the ffmbc inputs to specify that you are using the piped video and it won't complain

I don't see the "vibrating" with this, other than the normal interlace and twittering problems. It's the same as ffmpeg pre-pipe, except with a bit more loss from MPEG2

or you can try other methods like tinterlace, or avisynth

[marcorocchini]

If you have mjpeg decompressor in my monitor this play ok:

https://www.dropbox.com/s/3khsg3msdlm4j9r/C0104playOK.avi?dl=0

while this play vibrating:
https://www.dropbox.com/s/htgp2q53hcaxxsa/C0104FFMBC.avi?dl=0


Using this I alwais see vibrating

ffmpeg -y -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -an -pix_fmt yuv422p -c:v rawvideo -f rawvideo - | ffmbc -y -f rawvideo -pix_fmt yuv422p -s 720x576 -r 25 -i - -i C0104.MXF -vf colormatrix=bt709:bt601 -acodec pcm_s16le -ar 48000 -map_audio_channel 1:1:0:0:1:0 -map_audio_channel 1:2:0:0:1:1 -map_audio_channel 1:3:0:0:1:2 -map_audio_channel 1:4:0:0:1:3 -map_audio_channel 1:5:0:0:1:4 -map_audio_channel 1:6:0:0:1:5 -map_audio_channel 1:7:0:0:1:6 -map_audio_channel 1:8:0:0:1:7 -target imx50 OUTPUT.mxf

[poisondeathray]

But you said ffmpeg alone (pre-pipe) is ok? It looks the same to me as the ffmbc output post pipe, just a bit worse from MPEG2. Even if you compare it frame by frame, it's the same.

However the ffmpeg don't vibrate, seems ok:

V:\brisighella>ffmpeg -i C0104.MXF -vf yadif=1:tff,scale=720:576,colormatrix=bt709:bt601,interlace -pix_fmt uyvy422 -c:v rawvideo -an outputavi.avi

In fact, if you use rawvideo instead of xdcam, you get bit for bit the same thing as pre-pipe

This is not the same as the 1st "vibrating" problem, when yadif wan't used. I verified there was a problem with that. So you might have a configuration or playback problem?

-vf interlace does apply a lowpass by default. So it isn't as "sharp" . This was discussed in your other thread. You can disable it but more "twittering" or ling buzzing will occur