avi2mp4.sh: Konvertiert Dateien nach MP4 (H264 o. XviD/AAC)

micmac · avi2mp4-1.1.16.zip

Code

avi2mp4.sh                                                        README


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-------------- Converts video files in batch mode to MP4 ---------------


Where to get it: http://forum.doom9.org/showthread.php?t=133598


Before putting this script to serious use encode a few samples first.


avi2mp4.sh is a batch converter. For each file a resolution gets calcu-
lated and a compressibility test determines the minimum bit rate needed
for the level of quality the user asks for.


If this isn't possible with the maximum bitrate the user allows, then
the output resolution gets downsized and a new compressibility test
starts.


Once a matching pair of bit rate and resolution has been found the input
file gets converted to H.264/MPEG-4 AVC or MPEG-4 video and AAC audio.
Finally these streams are wrapped into MP4.


Different kinds of subtitles can be added: SRT, SUB, 3GPP (TTXT) and
VobSub.


----------------------------- Requirements -----------------------------


- bc calculator
- faac or neroAacEnc (even Wine and a Windows binary will do)
- mplayer
- mencoder
- aacgain (at least v1.7.0; you can find a Debian package at RareWares:
  http://www.rarewares.org/debian/packages/unstable/)
- MP4Box (part of gpac; v0.4.4 or later required)


------------------------- Compressibility Tests ------------------------


The compressibility test is new. Send me an e-mail with concerns or
ideas you might have.


--------------------------------- Hints --------------------------------


Global options need to be set in a file in your user's home directory,
namely ~/.avi2mp4.conf. An initial configuration file will be created.


MEncoder is used for the video conversion. There are multiple possibili-
ties to influence MEncoder's behaviour. The first is the configuration
variable MENCODER_OPTS. The content will be passed on to MEncoder.


A second possibility is to add MEncoder options on a per file basis.
Put the desired options in a file and name it like the input file name
extended by the suffix ".me" (e.g. movie.avi.me).


You can add video filters on a per file basis as well. Write them into
a file the same way as before, only this time use the suffix ".vf". Your
filters will be prepended to the existing chain (scale=x:y,harddup).


avi2mp4.sh searches the video filter chain for "crop" statements. If one
is found the calculation of the output resolution will be adjusted
accordingly.


You can indicate that a video is Progressive NTSC by creating a file
with the suffix ".p" (frame rate of the output video will be 23.976
frames per second for NTSC input).


--------------------------- MPEG containers ----------------------------


MPEG containers are problematic because they don't contain a proper
index like AVI containers do. This wasn't a problem until the
compressibility test was introduced. Since then avi2mp4.sh relies on
being able to "jump" through the input file. More often then not this
didn't work with MPEG containers.


Because of that input files are now skipped when an MPEG container is
detected. You'll have to re-multiplex the files to, e.g., AVI:


mencoder -ovc copy -oac copy input.mpg -o movie.avi


To rip a DVD simply dump the title you want to convert to your disk
first:


mencoder dvd:// -ovc copy -oac copy -o movie.avi


Finally:


avi2mp4.sh movie.avi


-------------------------------- iPods ---------------------------------


You want your videos to play on your iPod?


- obey bit rate and resolution limits
- no "B" frames allowed. Also, with H.264, the baseline profile level
  must be set and CABAC disabled
	XVID_ENCOPTS=max_bframes=0
	X264_ENCOPTS=nocabac:level_idc=30:bframes=0
- AAC's Low Complexity (LC) profile must be used


Videos created with the initial configuration file should work on your
iPod out of the box. Same should be the case for your PSP.


Please also read about the configuration variables "MP4BOX_IPOD" and
"SBTL".


----------------------------- Configuration ----------------------------
...

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micmac · January 17, 2008 at 5:02 PM

Code

1.0.7: - Add a little enhancement to function c; ability to return to
         the n-th eclosing loop
       - Fix two funtion c calls returning to the wrong loops

micmac · January 18, 2008 at 3:08 AM

Code

1.0.8: - Remove myidentify log when skipping file
       - Use rm -f
       - Add possibility to add options to mencoder calls through
         $MENCODER_OPTS

micmac · January 27, 2008 at 2:08 PM

Code

1.0.9. - In case aspect ratio is not set simply assume Width:Height
       - Add -endpos .1 to myidentify to prevent playback of audio
         files; thanks to Reimar Doeffinger for the tip
       - Check $VFOPTS for cropping. If detected calculate new aspect
         ratio so we get a proper output resolution

budy · January 27, 2008 at 4:23 PM

Moin,

was erwartet das Skript denn für Parameter? Evtl. könnte man das so machen, dass da Skript auch vom vdradmin aus aufgerufen werden kann.

Cheers,
Budy

micmac · January 27, 2008 at 4:51 PM

Quote

Original von budy
was erwartet das Skript denn für Parameter? Evtl. könnte man das so machen, dass da Skript auch vom vdradmin aus aufgerufen werden kann.

Nur die Pfade zu den zu konvertierenden Dateien.

budy · January 27, 2008 at 5:24 PM

Das skript erwartet dann aber eine mpg Datei, z.B. aus vdrsync, oder?

micmac · January 27, 2008 at 5:56 PM

Stimmt, da hast Du Recht. Das Skript kann keine Schnittmarken interpretieren.

micmac · January 29, 2008 at 12:41 PM

Code

1.1.0: - Remove bogus comma from sed call (BASENAME="...")
       - Remove redundant scale command from bc call
       - Check for (and prevent) upscaling of video
       - Lower the bitrate with regards to BPP
       - Move crop detection around
       - Update crop detection for special cases w=0 and h=0; this
         also fixes a potential division by zero
       - Update comments
       - Add CH and CW to function c so both get unset
       - Dimension -> Resolution
       - Display $CW x $CH as resolution if available
       - Make sure ID_VIDEO_WIDTH, ID_VIDEO_HEIGHT, ID_VIDEO_FPS and
         ID_AUDIO_NCH aren't negative
       - Fix the for loop that looks at output resolutions

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micmac · January 29, 2008 at 1:05 PM

%)

Code

1.1.1: - Fix behaviour when supplied cropping values are bogus

micmac · January 29, 2008 at 9:56 PM

Code

1.1.2: - Another attempt to correct the behaviour in case of bogus
         crop values; only accept numbers and let mencoder do the
         dying
       - Change loop expression in c-style for-loop once more just for
         correctness' sake

micmac · February 16, 2008 at 10:54 AM

Code

1.1.3: - Direct error messages to stderr
       - Minor comment fix
       - If there's a ".p" file treat video as progressive
       - Users can add mencoder options on a per-file basis
       - Add tip about DVD ripping
       - Add clear_variables function

micmac · April 3, 2008 at 11:55 AM

Code

1.1.4: - Add possiblity to set maximum output resolution, thanks to
         L. Pearce for the idea; see comments regarding $MAX_RES
       - Changed comments regarding MP4Box crashes (added suggestion
         for real workaround)

micmac · June 15, 2008 at 9:59 PM

Code

1.1.5: - Add $MP4BOX_IPOD to set whether "MP4Box -ipod ..." is run
       - Add possibility to renice the script (alter its priority)
       - use "-oac pcm" instead of "-oac copy"; it does add a little
         overhead (and we need more drive space) but it helps keeping
         audio and video in sync; also some audio codecs cannot be
         muxed into AVI, e.g. Vorbis, so now we're working around this
         issue

micmac · June 26, 2008 at 7:10 PM

Code

1.1.6:
        - Split release into ChangeLog, README, INSTALL and script itself
        - Add possibility to use neroAacEnc AAC encoder instead of faac; it's
          not Open Source but I ran into an issue with faac earlier and
          apparently it's not maintained anymore
        - Increase accuracy of aspect calculation; I doubt this has any effect

micmac · July 8, 2008 at 9:57 AM

Code

1.1.7:
        - mention faac in INSTALL
        - add possibility to override neroAacEnc binary (README for more
          info)
        - add Xvid support; it's so much faster than x264, had to add it
        - add configuration file example to README

micmac · August 3, 2008 at 9:13 AM

Code

1.1.8:
        - use random ASCII file names to work around problems with special
          characters (e.g. with MPlayer's pcm writer and gpac)
        - make the script a little bolder ;)

micmac · August 31, 2008 at 5:56 PM

Code

1.1.9:
	- make sure muxing doesn't result in variable video frame rate
	- cleaned up quite a bit (quoting, brackets, ...)
	- better error detection
	- clean user configuration file before sourcing it
	- write initial configuration file
	- got rid of all evals
	- removed hardcoding of iPod-specific encoder options

micmac · September 7, 2008 at 6:45 PM

Code

1.1.10:
	- remove BPP usage
	- add compressibility check
	- delete INSTALL file (put content into README)
	- clean up README
	- (hopefully) last batch of quoting fixes
	- make scripting style more consistent
	- better sed scripts
	- use $HOME instead of "~" expansion
	- move command substitutions out of [tests]

micmac · October 26, 2008 at 10:24 AM

Code

1.1.11:
        - during compressibility test capture mencoder output in a file
          and display content of file in case mencoder exits with an
          error, otherwise user wouldn't know what went wrong
        - used long command options when available
        - don't write/source temporary configuration file
        - don't just source the mplayer -identify output either for that
          matter
        - only load necessary variables from configuration file and
          mplayer's identify output
        - use random name for myidentify output, too
        - set sane PATH, IFS and umask
        - clear all aliases and the command path hash
        - prevent core dumps
        - end shebang line with hyphen
        - changed name of array media_vars to all_media_vars and added
          an array called mplayer_media_vars for clarity's sake
        - made parsing of file for variable a function
        - changed the initial configuration a bit
        - refuse to crop repeatedly
        - demand Bash, version 2 or greater

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