Encoding from command line

elwood _musicali # for a in ls ./*.* ; do ffmpeg -y -i "$a" -acodec mp3 -f flv /scratch/`echo "$a"|sed -e s@' '@'_'@g`; done

Quick commands to Encode/Decode Multimedia files

DVD

Rip DVD to DivX

1. count dvd titles, this example is using 8 of them:
2. audio:

mencoder dvd://1 -ovc frameno -o frameno.avi -oac mp3lame -lameopts vbr=3 -alang es -chapter 1-8

1. video.
2. last command output will suggest a vbitrate=xxx value:

mencoder dvd://1 -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vbitrate=1000:vpass=1 -oac copy -o movie.avi -chapter 1-8
mencoder dvd://1 -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vbitrate=1000:vpass=2 -oac copy -o movie.avi -chapter 1-8

1. divx will be movie.avi.

Rip DVD generic

modo I

mencoder /dev/dvd-hdd -o CINEMA_STRANGE.avi -oac copy -ovc lavc -lavcopts vcodec=mpeg4

modo II ~15 Min.

mencoder dvd://1 -ovc frameno -o frameno.avi -oac mp3lame -lameopts vbr=3 -alang es -chapter 1-8

~100 Min.

mencoder dvd://1  -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vbitrate=1130:vpass=1 -oac copy -o movie.avi -chapter 1-8 
mencoder dvd://1  -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vbitrate=1130:vpass=2 -oac copy -o movie.avi -chapter 1-8 

DVD 4:3

mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd -vf scale=720:576 \
-srate 48000 -af lavcresample=48000 -lavcopts vcodec=mpeg2video -ofps 25 \
-o /fileout.mpg /filein.avi

PAL Widescreen

mencoder -of mpeg -mpegopts format=dvd:vaspect=16/9:vframerate=25 -srate 48000 \
-ofps 25 -ovc lavc -oac lavc -lavcopts \
codec=mpeg2video:vrc_buf_size=1835:keyint=15:vrc_maxrate=9800:vbitrate=4900:aspect=16/9:acodec=ac3:abitrate=192 \
-o /fileout.mpeg2  /filein.mpg

Scalare

mencoder video.mpg -oav copy -ovc copy -vf scale=120:100 -o scaled.mpg

PAL Fullscreen

mencoder -of mpeg -mpegopts format=dvd:vaspect=4/3:vframerate=25 -srate 48000 \
-ofps 25 -ovc lavc -oac lavc -lavcopts \
codec=mpeg2video:vrc_buf_size=1835:keyint=15:vrc_maxrate=9800:vbitrate=4900:aspect=4/3:acodec=ac3:abitrate=192 \
-o /fileout.mpeg2  /filein.mpg

Filters

Crop a video

mplayer -vf crop=470:350:5:100 "$fileee"

Television/Camera

Registrare dal DVB (Digital Video Broadcasting)

• Satellite o digitale terrestre.

mencoder dvb://CUATRO  -ovc copy -oac copy -o Film.avi

Non ricordo...

mplayer -vo mpegpes -ao mpegpes -vop lavc=5000:25,expand=688:576:-1:-1:1,scale=688:563   -cache 8192 -slave -nolirc  -subpos 80 -sub-bg-color 0 -sub-bg-alpha 255 -quiet

Guardo la webcam con mplayer

mplayer tv:// -tv driver=v4l:width=640:height=480:outfmt=rgb24:device=/dev/video0:noaudio -flip

Registro la webcam con mencoder...

mencoder tv:// -tv driver=v4l:width=640:height=480:outfmt=rgb24:device=/dev/video0:noaudio -flip -o camed.avi -ovc lavc

Oppure

mencoder  tv:// -tv driver=v4l:width=320:height=240:fps=15:outfmt=rgb24:device=/dev/video0:alsa:forceaudio -flip -ofps 11.44 -ovc lavc -lavcopts vcodec=rv10 -oac pcm -noskip -o prova.avi

Images...

cacciare un frame con ffmpeg verso jpg - estrazione 1° frame in jpg

estrarre il 1° frame

ffmpeg -i <file sorgente> -ss 00:00:00 -t 0.04 -f mjpeg <outputfile.jpg>

Network

Save a stream

mplayer http://mplayer.hq/example.avi -dumpstream -dumpfile dumpato.avi

Grabando ,cortando y comprimiendo un stream de tv3

mplayer "mms://directe.3alacarta.tvcatalunya.com/reflector:60738?auth=db.bWbEd.dWc5b.asaRazb4daaCcmcPdfaU-bgZTm9-8-vga-KFlmE-r8qcl7ram6o6phj6rgmllkpjp7r7j9l9r8q7l6ramapkqkkjr9mllkpjqksikmmnslrimjsGnwpkqkkjsImqlo&aifp=fhgt&WMCache=0" -dumpstream -dumpfile dumpato.avi

mencoder  -ss 826.5  dumpato.avi -o dumpato_tagliato.avi -ovc copy -oac copy

mencoder  -endpos 108  dumpato_tagliato.avi -o dumpato_montato.avi

mencoder  dumpato_montato.avi -o dumpato_copresv.avi  -oac copy  -ovc lavc -of mpeg -lavcopts vcodec=mpeg2video -ofps 1

Ascoltare l'audio di mplayer in un host remoto: Vedi ESOUND

• faccio partire il server audio di rete su elwood:

[xunil@elwood ~]$ esd -tcp -port 9876 -public &
[1] 3849
- accepting connections on port 9876

• Apro il video (uno stream in questo caso) specificando host e porta del server audio

[xunil@zombie ~]$ mplayer -ao esd:elwood:9876 mms://rntlivewm.rai.it/_rn24_live_

• così vedo il vido su zombie e sento l'audio su elwood, cioè vedo dalla cucina e sento dalla camera da letto, non proprio comodo:
• allora trorno in camera, da elwood, e faccio:

[xunil@elwood ~]$ ssh -X zombie mplayer -ao esd:elwood:9876 mms://rntlivewm.rai.it/_rn24_live_

• adesso la situazione è strana, una persona normale, sana non noterebbe differenza tra "fare doppio click" sul video o

Mandare l'audio su un altro host (elwood)

mplayer -ao esd:elwood:9876  r24-24luglio.avi

encodare un video in flv (avi to flv) (mpg to flv) con ffmpeg

ffmpeg -y -i dumpato2.avi -acodec mp3 -f flv dumpato2.flv

Motion JPEG audio PCM

il "2> /dev/null" serve per 'buttare' lo standard error, nel caso qualcosa non funzioni, rimuoverlo dal comando.

mencoder video.avi -oac pcm -ovc lavc -lavcopts vcodec=mjpeg -o MJPEG_video.avi 2> /dev/null

Motion PNG (MPNG)

mencoder mf://*.png -mf w=800:h=600:fps=25:type=png -ovc copy -oac copy -o output.avi

Motion TGA (MTGA)

mencoder mf://*.tga -mf w=800:h=600:fps=25:type=tga -ovc copy -oac copy -o output.avi

Fare il dumpo di un stream (TV da internet per esempio) in XVID

mencoder mms://sream
-ovc xvid  -xvidencopts bitrate=1150 -vf scale=640:480 -oac mp3lame -o fileout.avi

...In qualità DV

mencoder timegousbyconloli.avi -ovc libdv -vf scale=720:576 -oac pcm -o timegousbyconlolippp.avi

==== tagliare un video dal secondo minuto (120) fino a 20 secondi dopo

mencoder  -ss 120 -endpos 15 video.avi -o video_tagliato.avi -ovc lavc

Tagliare solo i primi 30 min (1800 sec.)

mencoder -endpos 1800 rec-CUATRO-20070213-01:30.avi -o /mirror160/_video/__Temp/rec-CUATRO-20070213-01:30_tagliato.avi -ovc copy -oac copy

che prestazioni!

Pos:1494.0s  37349f ( 9%) 1469.33fps Trem:   4min 10447mb  A-V:0.040 [5154:128]

Theora

Convert TO theora

• Examples: (from ffmpeg2theora help)

ffmpeg2theora videoclip.avi (will write output to videoclip.ogv)

ffmpeg2theora videoclip.avi --subtitles subtitles.srt (same, with subtitles)

cat something.dv | ffmpeg2theora -f dv -o output.ogv -

• Encode a series of images:

ffmpeg2theora frame%06d.png -o output.ogv

• Live streaming from V4L Device:

ffmpeg2theora /dev/video0 -f video4linux --inputfps 15 -x 160 -y 128 -o - \
| oggfwd icast2server 8000 password /theora.ogv

• Live encoding from a DV camcorder (needs a fast machine):

dvgrab - | ffmpeg2theora -f dv -x 352 -y 288 -o output.ogv -

• Live encoding and streaming to icecast server:

 dvgrab --format raw - \
  | ffmpeg2theora -f dv -x 160 -y 128 -o /dev/stdout - \
  | oggfwd icast2server 8000 password /theora.ogv

Fare una gif89a (-gif animata) con mplayer da un video.

mplayer mov03331.mpg -loop 0 -vo gif89a:fps=15.0:output=caffe1.gif

Informazioni mandando in Play da MPLAYER

Eseguendo il comando che segue , le opzioni '-v -identify' ci posso dare delle informazioni molto utili del video che mandiamo in PLAY:

 mplayer -v -identify -aspect 4:3 /root/Desktop/Prova03.avi  

EXAMPLES OF MENCODER USAGE (from ~$ man mencoder)

• Encode DVD title #2, only selected chapters: ===

mencoder dvd://2 -chapter 10-15 -o title2.avi -oac copy -ovc lavc -lavcopts vcodec=mpeg4

• Encode DVD title #2, resizing to 640x480:

mencoder dvd://2 -vf scale=640:480 -o title2.avi -oac copy -ovc lavc -lavcopts vcodec=mpeg4

• Encode DVD title #2, resizing to 512xHHH (keep aspect ratio):

mencoder dvd://2 -vf scale -zoom -xy 512 -o title2.avi -oac copy -ovc lavc -lavcopts vcodec=mpeg4

• The same, but with bitrate set to 1800kbit and optimized macroblocks:

mencoder dvd://2 -o title2.avi -oac copy -ovc lavc -lavcopts vcodec=mpeg4:mbd=1:vbitrate=1800

• The same, but with MJPEG compression:

mencoder dvd://2 -o title2.avi -oac copy -ovc lavc -lavcopts vcodec=mjpeg:mbd=1:vbitrate=1800

• Encode all *.jpg files in the current directory:

mencoder "mf://*.jpg" -mf fps=25 -o output.avi -ovc lavc -lavcopts vcodec=mpeg4

• Encode from a tuner (specify a format with -vf format):

mencoder -tv driver=v4l:width=640:height=480 tv:// -o tv.avi -ovc rawnuv

• Encode from a pipe:

rar p test-SVCD.rar | mencoder -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=800 -ofps 24 -

MPEG 2

http://www.mplayerhq.hu/DOCS/HTML/en/index.html http://forum.doom9.org/archive/index.php/t-110761.html

• mencoder

OPZIONI DEMUXER/FLUSSO (STREAM)

-pvr <opzione1:opzione2:...> (solo PVR)
Questa  opzione  imposta varie proprietà di codifica per il modulo di cattura PVR.  Deve essere usata con schede di codifica MPEG via hardware supp-
portate dal driver V4L2.  Le schede Hauppauge WinTV PVR-150/250/350/500 e tutte quelle basate su IVTV sono conosciute come schede  di  cattura  PVR.
Attenzione che solamente il kernel Linux 2.6.18 o maggiore è capace di gestire il flusso MPEG attraverso lo strato V4L2.  Per la cattura hardware di
un flusso MPEG e la visione attraverso MPlayer/MEncoder, usa ’pvr://’ come URL del filmato.

fmt=<valore>
 Seleziona un formato MPEG per la codifica:
  ps:    MPEG-2 Program Stream (default)
  ts:    MPEG-2 Transport Stream
  mpeg1: MPEG-1 System Stream
  vcd:   flusso compatibile Video CD
  svcd:  flusso compatibile Super Video CD
  dvd:   flusso compatibile DVD

TS (Transport Stream)

mencoder -of lavf -lavfopts format=mpegts \
-lavcopts vcodec=mpeg2video:acodec=mp2:abitrate=224:vbitrate=3200 -o test2_mpegts_1109.m2t \
-ovc lavc -oac lavc /export/data/mediaroot/video/mid/1109.mp4

DA MPG A DV

esempio da Mpg DVD (vob) a DV non compresso:

ffmpeg -i /mnt/win/linux/dvd_da_convertire/kidd-pivot-01.MPG -target dv /media/LACIE/temp/kidd-pivot-01.dv

Formati 3pg cellulari

• Nokia XpressMusic, display:320x240

mpeg4 libamr_nb

ffmpeg -i "$video" -s 320x240 -r 14.99 -vcodec mpeg4 -ac 1 -ar 8000 -acodec libamr_nb -b 80k -ab 10.2k -y $out

mpeg4 libamr_wb (va a scatti l'audio)

ffmpeg -i "$video" -s 320x240 -r 14.99 -vcodec mpeg4 -ac 1 -ar 8000 -acodec libamr_nb -b 224k -ab 12.2k 

mpeg4 libamr_wb (va a scatti l'audio)

ffmpeg -i "$video" -s 320x240 -r 14.99 -vcodec mpeg4 -ac 1 -ar 16000 -acodec libamr_wb -b 100k -ab 18.25k -y  

ffmpeg -i "$video" -s 320x240 -r 14.99 -vcodec mpeg4 -ac 1 -ar 16000 -acodec libamr_wb -b 80k -ab 12.65k -y 

h263p mp3 (non letto da cell Nokia per via dell'audio mp3)

ffmpeg -i "$video" -s qcif    -r 20    -vcodec h263p -acodec mp3 -ar 22050 -b 128k -ab 32k -y $out

H.264 (x264)

http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-x264.html

http://en.wikipedia.org/wiki/X264

http://en.wikipedia.org/wiki/H.264

Very high quality

subq=6:partitions=all:8x8dct:me=umh:frameref=5:bframes=3:b_pyramid:weight_b	6fps	0dB

High quality

subq=5:8x8dct:frameref=2:bframes=3:b_pyramid:weight_b	13fps	-0.89dB

Fast

subq=4:bframes=2:b_pyramid:weight_b	17fps	-1.48dB

mencoder -v -o video.264

level_idc=41:bframes=3:frameref=2:nopsnr:nossim:pass=1:threads=auto

---

mencoder $ifile -of avi -vf scale=352:288 -ovc x264 -x264encopts bitrate=1000:subq=6:partitions=all:8x8dct:me=umh:frameref=5:bframes=3:b_pyramid:weight_b:threads=auto -o Desktop/test2641.avi

mencoder $ifile -of avi -ovc x264 -x264encopts bitrate=3000:subq=6:partitions=all:8x8dct:me=umh:frameref=5:bframes=3:b_pyramid:weight_b:threads=auto -o Desktop/test2641.avi

mencoder $ifile -of avi -ovc x264 -x264encopts bitrate=500:subq=5:8x8dct:frameref=2:bframes=3:b_pyramid:weight_b:threads=auto -o Desktop/test2641.avi

Per AVID

ffmpeg -i ../hi/1906.dv -vcodec libx264 -b 4096000 -t 10 -subq 6 -acodec libfaac -ar 48000 -ab 128000 -ac 2 -f mp4  1906_ffmpeg_Afaac_Vx264.mp4
ffmpeg -i ../hi/1906.dv -vcodec libx264 -b 4096000 -t 10 -subq 6 -acodec libfaac -ac 2 -f mp4  1906_ffmpeg_Afaac_Vx264.mp4

Working PIPE

• esempio da omf file di avid

mkfifo videopipe

Aprire nuova shell:

cat videopipe | ffmpeg -i - -target dv output.dv

Toranre alla vecchia shell:

mencoder <filevideo.omf> -ovc copy -oac pcm -o videopipe

Quando i due hanno terminato il play e l'encoding:

unlink videopipe 

• reccare e encodare DV

dvgrab --autosplit --format raw -|ffmpeg -f dv -i - -target vcd f.mpg

elwood _musicali # for a in ls ./*.* ; do ffmpeg -y -i "$a" -acodec mp3 -f flv /scratch/`echo "$a"|sed -e s@' '@'_'@g`; done

parametri FFmpeg

Main options:

 -L                  show license
 -h                  show help
 -version            show version
 -formats            show available formats, codecs, protocols, ...
 -f fmt              force format
 -img img_fmt        force image format
 -i filename         input file name
 -y                  overwrite output files
 -t duration         set the recording time
 -fs limit_size      set the limit file size
 -ss time_off        set the start time offset
 -itsoffset time_off  set the input ts offset
 -title string       set the title
 -timestamp time     set the timestamp
 -author string      set the author
 -copyright string   set the copyright
 -comment string     set the comment
 -v verbose          control amount of logging
 -target type        specify target file type ("vcd", "svcd", "dvd", "dv", "pal-vcd", "ntsc-svcd", ...)
 -dframes number     set the number of data frames to record
 -hq                 activate high quality settings
 -scodec codec       force subtitle codec ('copy' to copy stream)
 -newsubtitle        add a new subtitle stream to the current output stream
 -slang code         set the ISO 639 language code (3 letters) of the current subtitle stream

 Video options:
 -b bitrate          set video bitrate (in kbit/s)
 -vframes number     set the number of video frames to record
 -r rate             set frame rate (Hz value, fraction or abbreviation)
 -s size             set frame size (WxH or abbreviation)
 -aspect aspect      set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
 -fixaspect          fix aspect ratio
 -croptop size       set top crop band size (in pixels)
 -cropbottom size    set bottom crop band size (in pixels)
 -cropleft size      set left crop band size (in pixels)
 -cropright size     set right crop band size (in pixels)
 -padtop size        set top pad band size (in pixels)
 -padbottom size     set bottom pad band size (in pixels)
 -padleft size       set left pad band size (in pixels)
 -padright size      set right pad band size (in pixels)
 -padcolor color     set color of pad bands (Hex 000000 thru FFFFFF)
 -vn                 disable video
 -bt tolerance       set video bitrate tolerance (in kbit/s)
 -maxrate bitrate    set max video bitrate tolerance (in kbit/s)
 -minrate bitrate    set min video bitrate tolerance (in kbit/s)
 -bufsize size       set ratecontrol buffer size (in kByte)
 -vcodec codec       force video codec ('copy' to copy stream)
 -sameq              use same video quality as source (implies VBR)
 -pass n             select the pass number (1 or 2)
 -passlogfile file   select two pass log file name
 -newvideo           add a new video stream to the current output stream

 Advanced Video options:
 -pix_fmt format     set pixel format
 -g gop_size         set the group of picture size
 -intra              use only intra frames
 -vdt n              discard threshold
 -qscale q           use fixed video quantiser scale (VBR)
 -qmin q             min video quantiser scale (VBR)
 -qmax q             max video quantiser scale (VBR)
 -lmin lambda        min video lagrange factor (VBR)
 -lmax lambda        max video lagrange factor (VBR)
 -mblmin q           min macroblock quantiser scale (VBR)
 -mblmax q           max macroblock quantiser scale (VBR)
 -qdiff q            max difference between the quantiser scale (VBR)
 -qblur blur         video quantiser scale blur (VBR)
 -qsquish squish     how to keep quantiser between qmin and qmax (0 = clip, 1 = use differentiable function)
 -qcomp compression  video quantiser scale compression (VBR)
 -rc_init_cplx complexity  initial complexity for 1-pass encoding
 -b_qfactor factor   qp factor between p and b frames
 -i_qfactor factor   qp factor between p and i frames
 -b_qoffset offset   qp offset between p and b frames
 -i_qoffset offset   qp offset between p and i frames
 -ibias bias         intra quant bias
 -pbias bias         inter quant bias
 -rc_eq equation     set rate control equation
 -rc_override override  rate control override for specific intervals
 -me method          set motion estimation method
 -dct_algo algo      set dct algo
 -idct_algo algo     set idct algo
 -me_threshold       motion estimaton threshold
 -mb_threshold       macroblock threshold
 -er n               set error resilience
 -ec bit_mask        set error concealment
 -bf frames          use 'frames' B frames
 -mbd mode           macroblock decision
 -mbcmp cmp function  macroblock compare function
 -ildctcmp cmp function  ildct compare function
 -subcmp cmp function  subpel compare function
 -cmp cmp function   fullpel compare function
 -precmp cmp function  pre motion estimation compare function
 -preme              pre motion estimation
 -lelim elim         single coefficient elimination threshold for luminance (negative values also consider DC coefficient)
 -celim elim         single coefficient elimination threshold for chrominance (negative values also consider DC coefficient)
 -lumi_mask          luminance masking
 -dark_mask          darkness masking
 -scplx_mask         spatial complexity masking
 -tcplx_mask         temporal complexity masking
 -p_mask             inter masking
 -4mv                use four motion vector by macroblock (MPEG4)
 -obmc               use overlapped block motion compensation (h263+)
 -lf                 use loop filter (h263+)
 -part               use data partitioning (MPEG4)
 -bug param          workaround not auto detected encoder bugs
 -strict strictness  how strictly to follow the standards
 -deinterlace        deinterlace pictures
 -ildct              force interlaced dct support in encoder (MPEG2/MPEG4)
 -ilme               force interlaced me support in encoder (MPEG2/MPEG4)
 -psnr               calculate PSNR of compressed frames
 -vstats             dump video coding statistics to file
 -vhook module       insert video processing module
 -aic                enable Advanced intra coding (h263+)
 -aiv                enable Alternative inter vlc (h263+)
 -umv                enable Unlimited Motion Vector (h263+)
 -ssm                enable Slice Structured mode (h263+)
 -alt                enable alternate scantable (MPEG2/MPEG4)
 -qprd               
 -cbp                
 -trell              enable trellis quantization
 -mv0                try to encode each MB with MV=<0,0> and choose the better one (has no effect if mbd=0)
 -naq                normalize adaptive quantization
 -cgop               closed gop
 -sgop               strict gop
 -noout              skip bitstream encoding
 -scan_offset        enable SVCD Scan Offset placeholder
 -qpel               enable 1/4-pel
 -intra_matrix matrix  specify intra matrix coeffs
 -inter_matrix matrix  specify inter matrix coeffs
 -top                top=1/bottom=0/auto=-1 field first
 -nr                 noise reduction
 -qns                quantization noise shaping
 -sc_threshold threshold  scene change threshold
 -me_range range     limit motion vectors range (1023 for DivX player)
 -dc precision       intra_dc_precision
 -coder              coder type
 -context            context model
 -pred               prediction method
 -vprofile           profile
 -vlevel             level
 -nssew              weight
 -subq               
 -mepc factor (1.0 = 256)  motion estimation bitrate penalty compensation
 -lowres             
 -vtag fourcc/tag    force video tag/fourcc
 -skip_threshold threshold  frame skip threshold
 -skip_factor factor  frame skip factor
 -skip_exp exponent  frame skip exponent
 -skip_cmp compare function  frame skip compare function
 -gray               encode/decode grayscale

 Audio options:
 -aframes number     set the number of audio frames to record
 -ab bitrate         set audio bitrate (in kbit/s)
 -ar rate            set audio sampling rate (in Hz)
 -ac channels        set number of audio channels
 -an                 disable audio
 -acodec codec       force audio codec ('copy' to copy stream)
 -vol volume         change audio volume (256=normal)
 -newaudio           add a new audio stream to the current output stream
 -alang code         set the ISO 639 language code (3 letters) of the current audio stream

 Advanced Audio options:
 -atag fourcc/tag    force audio tag/fourcc

 Subtitle options:
 -scodec codec       force subtitle codec ('copy' to copy stream)
 -newsubtitle        add a new subtitle stream to the current output stream
 -slang code         set the ISO 639 language code (3 letters) of the current subtitle stream

 Audio/Video grab options:
 -vd device          set video grab device
 -vc channel         set video grab channel (DV1394 only)
 -tvstd standard     set television standard (NTSC, PAL (SECAM))
 -ad device          set audio device
 -grab format        request grabbing using
 -gd device          set grab device

 Advanced options:
 -map file:stream[:syncfile:syncstream]  set input stream mapping
 -map_meta_data outfile:infile  set meta data information of outfile from infile
 -debug              print specific debug info
 -vismv              visualize motion vectors
 -benchmark          add timings for benchmarking
 -dump               dump each input packet
 -hex                when dumping packets, also dump the payload
 -bitexact           only use bit exact algorithms (for codec testing)
 -re                 read input at native frame rate
 -loop               loop (current only works with images)
 -loop_output        number of times to loop output in formats that support looping (0 loops forever)
 -threads count      thread count
 -vsync              video sync method
 -async              audio sync method
 -vglobal            video global header storage type
 -copyts             copy timestamps
 -shortest           finish encoding within shortest input
 -b_strategy strategy  dynamic b frame selection strategy
 -ps size            set packet size in bits
 -error rate         error rate
 -muxrate rate       set mux rate
 -packetsize size    set packet size
 -muxdelay seconds   set the maximum demux-decode delay
 -muxpreload seconds  set the initial demux-decode delay
 -muxab bitrate      set the audio bitrate in mux tag (in kbit/s)
 -muxvb bitrate      set the video bitrate in mux tag (in kbit/s)

Problema -> Soluzione

Encoding

• convertendo in x264 con RedHat 5.2 il video in uscita risulta corrotto