[PD] encoding tif sequence (GEM pix_write) on linux

[cyrille henry]

hello,

here are the command line i use : 

ffmpeg -r 50 -s 1024x768 -i /data/rec_chdh/rec_%08d00000.jpg  -vcodec copy -i /data/rec_chdh.wav -acodec copy /data/copy.avi

this make uncompressed (very big) file (50fps / 1024x768)



/home/nusmuk/soft/ffmpeg/ffmpeg -i /data/copy.avi -vcodec libx264 -s 640x480 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4  -b 5000k -acodec libfaac -ab 384K -title "titre" -album "live" -year "2009" -author "chdh" titre.mp4

change bitrate to have the desired file size

you have to recompile ffmpeg with h264 support, but it worth it.

c


CICCOLIX a écrit :
> Hi,
> I tried different solution to create movies from Gem generated tif 
> sequences.
> The simplest way i found is based on use of the "transcode" command line 
> program.
> 
> I would like to share my notes, some command line, to help (maybe) others.
> 
> 
> 
> Encode with "transcode" (a linux commandline tool) a tif sequence 
> generated from GEM [pix_write]
> 
> 1) set pix_write to put all tif (max quality) in a folder and start record
> 
> |file ./myfolder/mybasename 00(
> |
> [pix_write]
> 
> 2) close pd
> 3) open a terminal, cd in the folder and create a textfile with the list 
> of tif
> 
> cd myfolder
> find . -type f -name '*.tif' | sort > filelist
> 
> 4) encode with "transcode": some setting:
> 
> - using ffmpeg with mjpeg compression (loss result)
> 
> transcode --use_rgb -i filelist  -y ffmpeg=RGB,null -F mjpeg  -o 
> od_ffmpeg_mjpeg_25fk.mov --export_fps 25,3 -z -g 720x576 -x 
> imlist=RGB,null --hard_fps -k
> 
> - using the same compression invoking quicktime for linux (same result)
> 
> transcode  -i filelist  -y mov=RGB,null -F ffmpeg_mjpg  -o 
> od_mov_ffmpeg_mjpg.mov --export_fps 25,3 -g 720x576 -x imlist=RGB,null 
> --hard_fps --use_rgb
> 
> - the same but dv compression (better result)
> 
> transcode  -i filelist  -y mov=RGB,null -F ffmpeg_dv_pal  -o 
> od_mov_ffmpeg_pal.mov --export_fps 25,3 -g 720x576 -x imlist=RGB,null 
> --hard_fps --use_rgb
> 
> - compression dv (no ffmpeg)
> 
> transcode  -i filelist  -y mov=RGB,null -F dv_pal  -o od_mov_dv_pal.mov 
> --export_fps 25,3 -g 720x576 -x imlist=RGB,null --hard_fps --use_rgb
> 
> - compressiond dv (without qt)
> 
> transcode  -i filelist  -y dv=RGB,null  -o od_dv.mov --export_fps 25,3 
> -g 720x576 -x imlist=RGB,null --hard_fps --use_rgb
> 
> - xvid compression (default xvid settings)
> 
> transcode  -i filelist  -y xvid4=RGB,null  -o od_xvid.mov --export_fps 
> 25,3 -g 720x576 -x imlist=RGB,null --hard_fps --use_rgb -k
> 
> 
> Note: some command line require the -k option that swap the rgb value, 
> some others require the -z option that flip the result
> 
> 
> hope help
> -- 
> Lazzaro
> 
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