25. august 2008 - 21:05Der er
48 kommentarer og 1 løsning
ffmpeg - thumb og convert til flv
Hejsa, nu har jeg læst en del omkring ffmpeg, og nåede frem til at kunne lave et thumb af den uploadede film - men men men..
Hvordan gør jeg så, således at den: * Tager et screenshot 3 sekunder inde i filmen * Uploader "thumb" billedet med størrelsen 412x300 (bredde og højde) * Laver filmen i den bedste kvalitet * Filmen kører flydenet (oplevede den "hakkede" i filmen med frames)
Den moderne arbejdsplads er i stigende grad afhængig af mødelokaler til at fremme samarbejde, men dette skift medfører også stigende sikkerhedsudfordringer.
ffmpeg -itsoffset -3 //Sekunder inde i videoen -i video.ext //Input video -vcodec png //Hvilket format skal billedet gemmes i -vframes 1 //Hvor mange billeder -an //Disable sound recording -f rawvideo //Gennemtving format -s 412x300 //Størrelse på billedet dump.png //Output fil
Når du laver en flv fil som output, hakker den så i din egen player eller også i andre ? Test evt. dine filer med FLVPlayer, hvis ikke allerede du har den.
Kvaliteten på thumb billederne bliver rigtig ringe - kan dette ændres ? Og den outputter ikke INPUT filmen til *.flv (da min webplayer kun understøtter det ! )
Jeg er desværre ikke så kendt med ffmpeg og windows, så du skal jo ihf. først sikre ffmpeg.exe kan åbnes korrekt. Hvad hvis du bare smider en kommando med ffmpeg.exe. Får du så et output i php ?
Test lige:
<?php echo '<pre>';
// Outputs all the result of shellcommand "ls", and returns // the last output line into $last_line. Stores the return value // of the shell command in $retval. $last_line = system('ffmpeg.exe', $retval);
// Printing additional info echo ' </pre> <hr />Last line of the output: ' . $last_line . ' <hr />Return value: ' . $retval; ?>
Jamen, det virker jo fint, for fik jo et screendump og en convertet flv fil (dog uden indhold), apopros må det jo være... Så det rigtigt nok det vi gør..
usage: ffmpeg [[infile options] -i infile]... {[outfile options] outfile}... Hyper fast Audio and Video encoder
Main options: -L show license -h show help -version show version -formats show available formats, codecs, protocols, ... -f fmt force format -i filename input file name -y overwrite output files -t duration record or transcode "duration" seconds of audio/video -fs limit_size set the limit file size in bytes -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 -genre string set the genre -album string set the album -v number set the logging verbosity level -target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...) -dframes number set the number of data frames to record -sn disable subtitle -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 set bitrate (in bits/s) -vb set bitrate (in bits/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) -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 -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, 'list' as argument shows all the pixel formats supported -intra use only intra frames -vdt n discard threshold -qscale q use fixed video quantizer scale (VBR) -qdiff q max difference between the quantizer scale (VBR) -rc_override override rate control override for specific intervals -me_threshold motion estimaton threshold -strict strictness how strictly to follow the standards -deinterlace deinterlace pictures -psnr calculate PSNR of compressed frames -vstats dump video coding statistics to file -vstats_file file dump video coding statistics to file -intra_matrix matrix specify intra matrix coeffs -inter_matrix matrix specify inter matrix coeffs -top top=1/bottom=0/auto=-1 field first -dc precision intra_dc_precision -vtag fourcc/tag force video tag/fourcc -qphist show QP histogram -vbsf bitstream filter
Audio options: -ab set bitrate (in bits/s) -aframes number set the number of audio frames to record -aq quality set audio quality (codec-specific) -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
Subtitle options: -sn disable subtitle -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 -sbsf bitstream filter
Audio/Video grab options: -vc channel set video grab channel (DV1394 only) -tvstd standard set television standard (NTSC, PAL (SECAM)) -isync sync read on input
Advanced options: -map file:stream[:syncfile:syncstream] set input stream mapping -map_meta_data outfile:infile set meta data information of outfile from infile -benchmark add timings for benchmarking -dump dump each input packet -hex when dumping packets, also dump the payload -re read input at native frame rate -loop_input 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 -adrift_threshold audio drift threshold -vglobal video global header storage type -copyts copy timestamps -shortest finish encoding within shortest input -dts_delta_threshold timestamp discontinuity delta threshold -programid desired program number -muxdelay seconds set the maximum demux-decode delay -muxpreload seconds set the initial demux-decode delay -sbsf bitstream filter AVCodecContext AVOptions: -b E.V.. set bitrate (in bits/s) -ab E..A. set bitrate (in bits/s) -bt E.V.. set video bitrate tolerance (in bits/s) -flags EDVA. mv4 E.V.. use four motion vector by macroblock (mpeg4) obmc E.V.. use overlapped block motion compensation (h263+) qpel E.V.. use 1/4 pel motion compensation loop E.V.. use loop filter gmc E.V.. use gmc mv0 E.V.. always try a mb with mv=<0,0> part E.V.. use data partitioning gray EDV.. only decode/encode grayscale psnr E.V.. error[?] variables will be set during encoding naq E.V.. normalize adaptive quantization ildct E.V.. use interlaced dct low_delay EDV.. force low delay alt E.V.. enable alternate scantable (mpeg2/mpeg4) trell E.V.. use trellis quantization bitexact EDVAS use only bitexact stuff (except (i)dct) aic E.V.. h263 advanced intra coding / mpeg4 ac prediction umv E.V.. use unlimited motion vectors cbp E.V.. use rate distortion optimization for cbp qprd E.V.. use rate distortion optimization for qp selection aiv E.V.. h263 alternative inter vlc slice E.V.. ilme E.V.. interlaced motion estimation scan_offset E.V.. will reserve space for svcd scan offset user data cgop E.V.. closed gop -me_method E.V.. set motion estimation method zero E.V.. zero motion estimation (fastest) full E.V.. full motion estimation (slowest) epzs E.V.. EPZS motion estimation (default) log E.V.. log motion estimation phods E.V.. phods motion estimation x1 E.V.. X1 motion estimation hex E.V.. hex motion estimation umh E.V.. umh motion estimation iter E.V.. iter motion estimation -me E.V.. set motion estimation method (deprecated, use me_method instead) zero E.V.. zero motion estimation (fastest) full E.V.. full motion estimation (slowest) epzs E.V.. EPZS motion estimation (default) log E.V.. log motion estimation phods E.V.. phods motion estimation x1 E.V.. X1 motion estimation hex E.V.. hex motion estimation umh E.V.. umh motion estimation iter E.V.. iter motion estimation -g E.V.. set the group of picture size -cutoff E..A. set cutoff bandwidth -frame_size E..A. -qcomp E.V.. video quantizer scale compression (VBR) -qblur E.V.. video quantizer scale blur (VBR) -qmin E.V.. min video quantizer scale (VBR) -qmax E.V.. max video quantizer scale (VBR) -qdiff E.V.. max difference between the quantizer scale (VBR) -bf E.V.. use 'frames' B frames -b_qfactor E.V.. qp factor between p and b frames -rc_strategy E.V.. ratecontrol method -b_strategy E.V.. strategy to choose between I/P/B-frames -hurry_up .DV.. -ps E.V.. rtp payload size in bits -bug .DV.. workaround not auto detected encoder bugs autodetect .DV.. old_msmpeg4 .DV.. some old lavc generated msmpeg4v3 files (no autodetection) xvid_ilace .DV.. Xvid interlacing bug (autodetected if fourcc==XVIX) ump4 .DV.. (autodetected if fourcc==UMP4) no_padding .DV.. padding bug (autodetected) amv .DV.. ac_vlc .DV.. illegal vlc bug (autodetected per fourcc) qpel_chroma .DV.. std_qpel .DV.. old standard qpel (autodetected per fourcc/version) qpel_chroma2 .DV.. direct_blocksize .DV.. direct-qpel-blocksize bug (autodetected per fourcc/version) edge .DV.. edge padding bug (autodetected per fourcc/version) hpel_chroma .DV.. dc_clip .DV.. ms .DV.. workaround various bugs in microsofts broken decoders -lelim E.V.. single coefficient elimination threshold for luminance (negative values also consider dc coefficient) -celim E.V.. single coefficient elimination threshold for chrominance (negative values also consider dc coefficient) -strict .DVA. how strictly to follow the standards very E.V.. strictly conform to a older more strict version of the spec or reference software strict E.V.. strictly conform to all the things in the spec no matter what consequences normal E.V.. inofficial E.V.. allow inofficial extensions experimental E.V.. allow non standardized experimental things -b_qoffset E.V.. qp offset between P and B frames -er .DVA. set error resilience strategy careful .DV.. compliant .DV.. aggressive .DV.. very_aggressive .DV.. -mpeg_quant E.V.. use MPEG quantizers instead of H.263 -qsquish E.V.. how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function) -rc_qmod_amp E.V.. experimental quantizer modulation -rc_qmod_freq E.V.. experimental quantizer modulation -rc_eq E.V.. set rate control equation -maxrate E.V.. set max video bitrate tolerance (in bits/s) -minrate E.V.. set min video bitrate tolerance (in bits/s) -bufsize E.VA. set ratecontrol buffer size (in bits) -rc_buf_aggressivity E.V.. currently useless -i_qfactor E.V.. qp factor between P and I frames -i_qoffset E.V.. qp offset between P and I frames -rc_init_cplx E.V.. initial complexity for 1-pass encoding -dct E.V.. DCT algorithm auto E.V.. autoselect a good one (default) fastint E.V.. fast integer int E.V.. accurate integer mmx E.V.. mlib E.V.. altivec E.V.. faan E.V.. floating point AAN DCT -lumi_mask E.V.. compresses bright areas stronger than medium ones -tcplx_mask E.V.. temporal complexity masking -scplx_mask E.V.. spatial complexity masking -p_mask E.V.. inter masking -dark_mask E.V.. compresses dark areas stronger than medium ones -idct EDV.. select IDCT implementation auto EDV.. int EDV.. simple EDV.. simplemmx EDV.. libmpeg2mmx EDV.. ps2 EDV.. mlib EDV.. arm EDV.. altivec EDV.. sh4 EDV.. simplearm EDV.. simplearmv5te EDV.. h264 EDV.. vp3 EDV.. ipp EDV.. xvidmmx EDV.. faani EDV.. floating point AAN IDCT -ec .DV.. set error concealment strategy guess_mvs .DV.. iterative motion vector (MV) search (slow) deblock .DV.. use strong deblock filter for damaged MBs -pred E.V.. prediction method left E.V.. plane E.V.. median E.V.. -aspect E.V.. sample aspect ratio -debug EDVAS print specific debug info pict .DV.. picture info rc E.V.. rate control bitstream .DV.. mb_type .DV.. macroblock (MB) type qp .DV.. per-block quantization parameter (QP) mv .DV.. motion vector dct_coeff .DV.. skip .DV.. startcode .DV.. pts .DV.. er .DV.. error resilience mmco .DV.. memory management control operations (H.264) bugs .DV.. vis_qp .DV.. visualize quantization parameter (QP), lower QP are tinted greener vis_mb_type .DV.. visualize block types -vismv .DV.. visualize motion vectors (MVs) pf .DV.. forward predicted MVs of P-frames bf .DV.. forward predicted MVs of B-frames bb .DV.. backward predicted MVs of B-frames -mb_qmin E.V.. obsolete, use qmin -mb_qmax E.V.. obsolete, use qmax -cmp E.V.. full pel me compare function sad E.V.. sum of absolute differences, fast (default) sse E.V.. sum of squared errors satd E.V.. sum of absolute Hadamard transformed differences dct E.V.. sum of absolute DCT transformed differences psnr E.V.. sum of squared quantization errors (avoid, low quality) bit E.V.. number of bits needed for the block rd E.V.. rate distortion optimal, slow zero E.V.. 0 vsad E.V.. sum of absolute vertical differences vsse E.V.. sum of squared vertical differences nsse E.V.. noise preserving sum of squared differences w53 E.V.. 5/3 wavelet, only used in snow w97 E.V.. 9/7 wavelet, only used in snow dctmax E.V.. chroma E.V.. -subcmp E.V.. sub pel me compare function sad E.V.. sum of absolute differences, fast (default) sse E.V.. sum of squared errors satd E.V.. sum of absolute Hadamard transformed differences dct E.V.. sum of absolute DCT transformed differences psnr E.V.. sum of squared quantization errors (avoid, low quality) bit E.V.. number of bits needed for the block rd E.V.. rate distortion optimal, slow zero E.V.. 0 vsad E.V.. sum of absolute vertical differences vsse E.V.. sum of squared vertical differences nsse E.V.. noise preserving sum of squared differences w53 E.V.. 5/3 wavelet, only used in snow w97 E.V.. 9/7 wavelet, only used in snow dctmax E.V.. chroma E.V.. -mbcmp E.V.. macroblock compare function sad E.V.. sum of absolute differences, fast (default) sse E.V.. sum of squared errors satd E.V.. sum of absolute Hadamard transformed differences dct E.V.. sum of absolute DCT transformed differences psnr E.V.. sum of squared quantization errors (avoid, low quality) bit E.V.. number of bits needed for the block rd E.V.. rate distortion optimal, slow zero E.V.. 0 vsad E.V.. sum of absolute vertical differences vsse E.V.. sum of squared vertical differences nsse E.V.. noise preserving sum of squared differences w53 E.V.. 5/3 wavelet, only used in snow w97 E.V.. 9/7 wavelet, only used in snow dctmax E.V.. chroma E.V.. -ildctcmp E.V.. interlaced dct compare function sad E.V.. sum of absolute differences, fast (default) sse E.V.. sum of squared errors satd E.V.. sum of absolute Hadamard transformed differences dct E.V.. sum of absolute DCT transformed differences psnr E.V.. sum of squared quantization errors (avoid, low quality) bit E.V.. number of bits needed for the block rd E.V.. rate distortion optimal, slow zero E.V.. 0 vsad E.V.. sum of absolute vertical differences vsse E.V.. sum of squared vertical differences nsse E.V.. noise preserving sum of squared differences w53 E.V.. 5/3 wavelet, only used in snow w97 E.V.. 9/7 wavelet, only used in snow dctmax E.V.. chroma E.V.. -dia_size E.V.. diamond type & size for motion estimation -last_pred E.V.. amount of motion predictors from the previous frame -preme E.V.. pre motion estimation -precmp E.V.. pre motion estimation compare function sad E.V.. sum of absolute differences, fast (default) sse E.V.. sum of squared errors satd E.V.. sum of absolute Hadamard transformed differences dct E.V.. sum of absolute DCT transformed differences psnr E.V.. sum of squared quantization errors (avoid, low quality) bit E.V.. number of bits needed for the block rd E.V.. rate distortion optimal, slow zero E.V.. 0 vsad E.V.. sum of absolute vertical differences vsse E.V.. sum of squared vertical differences nsse E.V.. noise preserving sum of squared differences w53 E.V.. 5/3 wavelet, only used in snow w97 E.V.. 9/7 wavelet, only used in snow dctmax E.V.. chroma E.V.. -pre_dia_size E.V.. diamond type & size for motion estimation pre-pass -subq E.V.. sub pel motion estimation quality -me_range E.V.. limit motion vectors range (1023 for DivX player) -ibias E.V.. intra quant bias -pbias E.V.. inter quant bias -coder E.V.. vlc E.V.. variable length coder / huffman coder ac E.V.. arithmetic coder raw E.V.. raw (no encoding) rle E.V.. run-length coder deflate E.V.. deflate-based coder -context E.V.. context model -mbd E.V.. macroblock decision algorithm (high quality mode) simple E.V.. use mbcmp (default) bits E.V.. use fewest bits rd E.V.. use best rate distortion -sc_threshold E.V.. scene change threshold -lmin E.V.. min lagrange factor (VBR) -lmax E.V.. max lagrange factor (VBR) -nr E.V.. noise reduction -rc_init_occupancy E.V.. number of bits which should be loaded into the rc buffer before decoding starts -inter_threshold E.V.. -flags2 EDVA. fast E.V.. allow non spec compliant speedup tricks sgop E.V.. strictly enforce gop size noout E.V.. skip bitstream encoding local_header E.V.. place global headers at every keyframe instead of in extradata bpyramid E.V.. allows B-frames to be used as references for predicting wpred E.V.. weighted biprediction for b-frames (H.264) mixed_refs E.V.. one reference per partition, as opposed to one reference per macroblock dct8x8 E.V.. high profile 8x8 transform (H.264) fastpskip E.V.. fast pskip (H.264) aud E.V.. access unit delimiters (H.264) brdo E.V.. b-frame rate-distortion optimization skiprd E.V.. RD optimal MB level residual skipping ivlc E.V.. intra vlc table drop_frame_timecode E.V.. non_linear_q E.V.. use non linear quantizer reservoir E..A. use bit reservoir -error E.V.. -antialias .DV.. MP3 antialias algorithm auto .DV.. fastint .DV.. int .DV.. float .DV.. -qns E.V.. quantizer noise shaping -threads EDV.. -mb_threshold E.V.. macroblock threshold -dc E.V.. intra_dc_precision -nssew E.V.. nsse weight -skip_top .DV.. number of macroblock rows at the top which are skipped -skip_bottom .DV.. number of macroblock rows at the bottom which are skipped -profile E.VA. unknown E.VA. aac_main E..A. aac_low E..A. aac_ssr E..A. aac_ltp E..A. -level E.VA. unknown E.VA. -lowres .DV.. decode at 1= 1/2, 2=1/4, 3=1/8 resolutions -skip_threshold E.V.. frame skip threshold -skip_factor E.V.. frame skip factor -skip_exp E.V.. frame skip exponent -skipcmp E.V.. frame skip compare function sad E.V.. sum of absolute differences, fast (default) sse E.V.. sum of squared errors satd E.V.. sum of absolute Hadamard transformed differences dct E.V.. sum of absolute DCT transformed differences psnr E.V.. sum of squared quantization errors (avoid, low quality) bit E.V.. number of bits needed for the block rd E.V.. rate distortion optimal, slow zero E.V.. 0 vsad E.V.. sum of absolute vertical differences vsse E.V.. sum of squared vertical differences nsse E.V.. noise preserving sum of squared differences w53 E.V.. 5/3 wavelet, only used in snow w97 E.V.. 9/7 wavelet, only used in snow dctmax E.V.. chroma E.V.. -border_mask E.V.. increases the quantizer for macroblocks close to borders -mblmin E.V.. min macroblock lagrange factor (VBR) -mblmax E.V.. max macroblock lagrange factor (VBR) -mepc E.V.. motion estimation bitrate penalty compensation (1.0 = 256) -bidir_refine E.V.. refine the two motion vectors used in bidirectional macroblocks -brd_scale E.V.. downscales frames for dynamic B-frame decision -crf E.V.. enables constant quality mode, and selects the quality (x264) -cqp E.V.. constant quantization parameter rate control method -keyint_min E.V.. minimum interval between IDR-frames (x264) -refs E.V.. reference frames to consider for motion compensation (Snow) -chromaoffset E.V.. chroma qp offset from luma -bframebias E.V.. influences how often B-frames are used -trellis E.VA. rate-distortion optimal quantization -directpred E.V.. direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal) -complexityblur E.V.. reduce fluctuations in qp (before curve compression) -deblockalpha E.V.. in-loop deblocking filter alphac0 parameter -deblockbeta E.V.. in-loop deblocking filter beta parameter -partitions E.V.. macroblock subpartition sizes to consider parti4x4 E.V.. parti8x8 E.V.. partp4x4 E.V.. partp8x8 E.V.. partb8x8 E.V.. -sc_factor E.V.. multiplied by qscale for each frame and added to scene_change_score -mv0_threshold E.V.. -b_sensitivity E.V.. adjusts sensitivity of b_frame_strategy 1 -compression_level E.VA. -use_lpc E..A. sets whether to use LPC mode (FLAC) -lpc_coeff_precision E..A. LPC coefficient precision (FLAC) -min_prediction_order E..A. -max_prediction_order E..A. -prediction_order_method E..A. search method for selecting prediction order -min_partition_order E..A. -max_partition_order E..A. -timecode_frame_start E.V.. GOP timecode frame start number, in non drop frame format -request_channels .D.A. set desired number of audio channels -drc_scale .D.A. percentage of dynamic range compression to apply AVFormatContext AVOptions: -probesize .D... -muxrate E.... set mux rate -packetsize E.... set packet size -fflags ED... ignidx .D... ignore index genpts .D... generate pts -track E.... set the track number -year E.... set the year -analyzeduration .D... how many microseconds are analyzed to estimate duration -cryptokey .D... decryption key -indexmem .D... max memory used for timestamp index (per stream) -rtbufsize .D... max memory used for buffering real-time frames SWScaler AVOptions: -sws_flags E.V.. scaler/cpu flags fast_bilinear E.V.. fast bilinear bilinear E.V.. bilinear bicubic E.V.. bicubic experimental E.V.. experimental neighbor E.V.. nearest neighbor area E.V.. averaging area bicublin E.V.. luma bicubic, chroma bilinear gauss E.V.. gaussian sinc E.V.. sinc lanczos E.V.. lanczos spline E.V.. natural bicubic spline print_info E.V.. print info accurate_rnd E.V.. accurate rounding mmx E.V.. MMX SIMD acceleration mmx2 E.V.. MMX2 SIMD acceleration 3dnow E.V.. 3DNOW SIMD acceleration altivec E.V.. AltiVec SIMD acceleration bfin E.V.. Blackfin SIMD acceleration full_chroma_int E.V.. full chroma interpolation full_chroma_inp E.V.. full chroma input
Last line of the output: full_chroma_inp E.V.. full chroma input Return value: 1
Har prøvet at converte fra .3gp, .avi osv.. Giver alle sammen 0 KB - men alt andet virker stortset, undtagen, at den ikke konverter til forrige film til .FLV.
$image bliver slet ikke benyttet, så det egentligt ligemeget. Den skal bare slettes.
okay jakob, nu har jeg lavet en klasse, men jeg forstår ikke helt hvorfor den ikke fylder indhold på min .flv.. og hvis jeg sætter det til .avi, laver den heller ikke noget indhold.
kan det være pga jeg kører 2 cmd 2 steder?
Jeg vil helst have det samplet ét sted, da jeg ved at ffmpeg sagtens kan lave .flv.
<?php class VideoUpload { var $ffmpeg = "./ffmpeg.exe"; var $MB = 9; var $NewFileName;
function __construct() { $this->ShowUploadFormular(); $this->NewFileName = time(); }
Det var satans.. Problemet er jo bare, at de fleste skal kunne lægge deres .3gp (fra mobilen) på sitet, da de fleste unge skal bruge websiden, og derfor bruger de ofte deres telefon.
Jeg er ikke sikker. Men skaf en prøve version af VMWARE og smid en Linux distro på. Så kan du teste det hele af, inden du smider penge efter lortet. Du bør også overveje at kigge på: http://ffmpeg-php.sourceforge.net/
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