jiaaro / pydub

Manipulate audio with a simple and easy high level interface
http://pydub.com
MIT License
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Mp3 Export output #5

Closed asmedrano closed 12 years ago

asmedrano commented 12 years ago

The file produced when I use:

sound.export("mashup.mp3", format="mp3)"

is unplayable. Here is the output from $ avplay

avplay mashup.mp3 
avplay version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2003-2012 the Libav developers
  built on Jun 12 2012 16:37:58 with gcc 4.6.3
[mp3 @ 0xb2300480] Format detected only with low score of 25, misdetection possible!
[mp3 @ 0xb2300480] Could not find codec parameters (Audio: mp3, 0 channels, s16)
[mp3 @ 0xb2300480] Estimating duration from bitrate, this may be inaccurate
mashup.mp3: could not find codec parameters

Exporting to wav however does work.

jiaaro commented 12 years ago

Do you have ffmpeg installed, it's required for all formats except for wav.

one good way to check is to see if you're able to import an mp3 file.

Sometimes if you have ffmpeg installed but pydub is unable to find it, you have to manually tell pydub where to find ffmpeg like so:

from pydub import AudioSegment
AudioSegment.converter = "/path/to/ffmpeg"

this should be just below the import

asmedrano commented 12 years ago

No Dice. I do have ffmpeg installed. /usr/bin/ffmpeg

from pydub import AudioSegment
AudioSegment.ffmpeg = "/usr/bin/ffmpeg"
# ^^^^^^^^^^^^^^^^^
# edit by maintainer: Starting in 0.9.0 this should now be AudioSegment.converter = …

def main():

    s = AudioSegment.from_mp3("mysound.mp3")
    out = s.reverse()
    out.export("out.mp3", format="mp3")

if __name__ == '__main__':
    main()
$ ffmpeg -version
ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jun 12 2012 16:37:58 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
ffmpeg 0.8.3-4:0.8.3-0ubuntu0.12.04.1
libavutil    51. 22. 1 / 51. 22. 1
libavcodec   53. 35. 0 / 53. 35. 0
libavformat  53. 21. 0 / 53. 21. 0
libavdevice  53.  2. 0 / 53.  2. 0
libavfilter   2. 15. 0 /  2. 15. 0
libswscale    2.  1. 0 /  2.  1. 0
libpostproc  52.  0. 0 / 52.  0. 0

I can import from mp3 just not export.

jiaaro commented 12 years ago

would you mind posting mysound.mp3 (you can upload to esploded.com if you don't have another way) as well as the output of out.export(…)?

asmedrano commented 12 years ago

Give this a whirl http://ubuntuone.com/5aamm9opLmf6UqJsX1VN6H

jiaaro commented 12 years ago

Since the output file is 0 bytes I'm going to assume there is an error happening when calling ffmpeg.

The export function creates a temp file to save the output (where this isn't necessary to produce wav files)...

would you mind running this ffmpeg command on the wav file directly?

$ ffmpeg -y -f wav -i ./voice_2.wav -f mp3 ./out.mp3

for me, the output was:

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  libavutil version: 49.0.0
  libavcodec version: 51.9.0
  libavformat version: 50.4.0
  built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
Input #0, wav, from './voice_2.wav':
  Duration: 00:00:07.2, start: 0.000000, bitrate: 705 kb/s
  Stream #0.0: Audio: pcm_s32le, 22050 Hz, mono, 705 kb/s
Output #0, mp3, to './out.mp3':
  Stream #0.0: Audio: mp3, 22050 Hz, mono, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
size=      57kB time=7.3 bitrate=  64.0kbits/s    
video:0kB audio:57kB global headers:0kB muxing overhead 0.000000%

producing a 58 KB mp3 file (which played fine)

jiaaro commented 12 years ago

Maybe you only have a decode codec but not encode?

what does this give you?

ffmpeg -formats

asmedrano commented 12 years ago

ffmpeg -formats
ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jun 12 2012 16:37:58 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
File formats:
 D. = Demuxing supported
 .E = Muxing supported
 --
  E 3g2             3GP2 format
  E 3gp             3GP format
 D  4xm             4X Technologies format
 D  IFF             IFF format
 D  ISS             Funcom ISS format
 D  MTV             MTV format
 DE RoQ             raw id RoQ format
  E a64             a64 - video for Commodore 64
 D  aac             raw ADTS AAC
 DE ac3             raw AC-3
  E adts            ADTS AAC
 DE adx             CRI ADX
 D  aea             MD STUDIO audio
 DE aiff            Audio IFF
 DE alaw            PCM A-law format
 DE alsa            ALSA audio output
 DE amr             3GPP AMR file format
 D  anm             Deluxe Paint Animation
 D  apc             CRYO APC format
 D  ape             Monkey's Audio
 D  applehttp       Apple HTTP Live Streaming format
 DE asf             ASF format
  E asf_stream      ASF format
 DE ass             Advanced SubStation Alpha subtitle format
 DE au              SUN AU format
 DE avi             AVI format
  E avm2            Flash 9 (AVM2) format
 D  avs             AVS format
 D  bethsoftvid     Bethesda Softworks VID format
 D  bfi             Brute Force & Ignorance
 D  bink            Bink
 D  bmv             Discworld II BMV
 D  c93             Interplay C93
 D  caf             Apple Core Audio Format
 DE cavsvideo       raw Chinese AVS video
 D  cdg             CD Graphics Format
  E crc             CRC testing format
 DE daud            D-Cinema audio format
 D  dfa             Chronomaster DFA
 DE dirac           raw Dirac
 DE dnxhd           raw DNxHD (SMPTE VC-3)
 D  dsicin          Delphine Software International CIN format
 DE dts             raw DTS
 DE dv              DV video format
 D  dv1394          DV1394 A/V grab
  E dvd             MPEG-2 PS format (DVD VOB)
 D  dxa             DXA
 D  ea              Electronic Arts Multimedia Format
 D  ea_cdata        Electronic Arts cdata
 DE eac3            raw E-AC-3
 DE f32be           PCM 32 bit floating-point big-endian format
 DE f32le           PCM 32 bit floating-point little-endian format
 DE f64be           PCM 64 bit floating-point big-endian format
 DE f64le           PCM 64 bit floating-point little-endian format
 D  fbdev           Linux framebuffer
 DE ffm             FFM (AVserver live feed) format
 DE ffmetadata      FFmpeg metadata in text format
 D  film_cpk        Sega FILM/CPK format
 DE filmstrip       Adobe Filmstrip
 DE flac            raw FLAC
 D  flic            FLI/FLC/FLX animation format
 DE flv             FLV format
  E framecrc        framecrc testing format
  E framemd5        Per-frame MD5 testing format
 DE g722            raw G.722
  E gif             GIF Animation
 D  gsm             raw GSM
 DE gxf             GXF format
 DE h261            raw H.261
 DE h263            raw H.263
 DE h264            raw H.264 video format
 D  idcin           id Cinematic format
 DE image2          image2 sequence
 DE image2pipe      piped image2 sequence
 D  ingenient       raw Ingenient MJPEG
 D  ipmovie         Interplay MVE format
  E ipod            iPod H.264 MP4 format
 D  iv8             A format generated by IndigoVision 8000 video server
 DE ivf             On2 IVF
 D  jack            JACK Audio Connection Kit
 D  jv              Bitmap Brothers JV
 DE latm            LOAS/LATM
 D  libdc1394       dc1394 v.2 A/V grab
 D  lmlm4           lmlm4 raw format
 D  lxf             VR native stream format (LXF)
 DE m4v             raw MPEG-4 video format
  E matroska        Matroska file format
 D  matroska,webm   Matroska/WebM file format
  E md5             MD5 testing format
 DE mjpeg           raw MJPEG video
 DE mlp             raw MLP
 D  mm              American Laser Games MM format
 DE mmf             Yamaha SMAF
  E mov             MOV format
 D  mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG-4/Motion JPEG 2000 format
  E mp2             MPEG audio layer 2
 DE mp3             MPEG audio layer 3
  E mp4             MP4 format
 D  mpc             Musepack
 D  mpc8            Musepack SV8
 DE mpeg            MPEG-1 System format
  E mpeg1video      raw MPEG-1 video
  E mpeg2video      raw MPEG-2 video
 DE mpegts          MPEG-2 transport stream format
 D  mpegtsraw       MPEG-2 raw transport stream format
 D  mpegvideo       raw MPEG video
  E mpjpeg          MIME multipart JPEG format
 D  msnwctcp        MSN TCP Webcam stream
 DE mulaw           PCM mu-law format
 D  mvi             Motion Pixels MVI format
 DE mxf             Material eXchange Format
  E mxf_d10         Material eXchange Format, D-10 Mapping
 D  mxg             MxPEG clip file format
 D  nc              NC camera feed format
 D  nsv             Nullsoft Streaming Video
  E null            raw null video format
 DE nut             NUT format
 D  nuv             NuppelVideo format
 DE ogg             Ogg
 DE oma             Sony OpenMG audio
 DE oss             Open Sound System playback
 D  pmp             Playstation Portable PMP format
  E psp             PSP MP4 format
 D  psxstr          Sony Playstation STR format
 D  pva             TechnoTrend PVA file and stream format
 D  qcp             QCP format
 D  r3d             REDCODE R3D format
 DE rawvideo        raw video format
  E rcv             VC-1 test bitstream
 D  rl2             RL2 format
 DE rm              RealMedia format
 D  rpl             RPL/ARMovie format
 DE rso             Lego Mindstorms RSO format
 DE rtp             RTP output format
 DE rtsp            RTSP output format
 DE s16be           PCM signed 16 bit big-endian format
 DE s16le           PCM signed 16 bit little-endian format
 DE s24be           PCM signed 24 bit big-endian format
 DE s24le           PCM signed 24 bit little-endian format
 DE s32be           PCM signed 32 bit big-endian format
 DE s32le           PCM signed 32 bit little-endian format
 DE s8              PCM signed 8 bit format
 DE sap             SAP output format
 D  sdp             SDP
  E segment         segment muxer
 D  shn             raw Shorten
 D  siff            Beam Software SIFF
 DE smjpeg          Loki SDL MJPEG
 D  smk             Smacker video
 D  sol             Sierra SOL format
 DE sox             SoX native format
 DE spdif           IEC 61937 (used on S/PDIF - IEC958)
 DE srt             SubRip subtitle format
  E svcd            MPEG-2 PS format (VOB)
 DE swf             Flash format
 D  thp             THP
 D  tiertexseq      Tiertex Limited SEQ format
 D  tmv             8088flex TMV
 DE truehd          raw TrueHD
 D  tta             True Audio
 D  tty             Tele-typewriter
 D  txd             Renderware TeXture Dictionary
 DE u16be           PCM unsigned 16 bit big-endian format
 DE u16le           PCM unsigned 16 bit little-endian format
 DE u24be           PCM unsigned 24 bit big-endian format
 DE u24le           PCM unsigned 24 bit little-endian format
 DE u32be           PCM unsigned 32 bit big-endian format
 DE u32le           PCM unsigned 32 bit little-endian format
 DE u8              PCM unsigned 8 bit format
 D  vc1             raw VC-1
 D  vc1test         VC-1 test bitstream format
  E vcd             MPEG-1 System format (VCD)
 D  video4linux2    Video4Linux2 device grab
 D  vmd             Sierra VMD format
  E vob             MPEG-2 PS format (VOB)
 DE voc             Creative Voice file format
 D  vqf             Nippon Telegraph and Telephone Corporation (NTT) TwinVQ
 D  w64             Sony Wave64 format
 DE wav             WAV format
 D  wc3movie        Wing Commander III movie format
  E webm            WebM file format
 D  wsaud           Westwood Studios audio format
 D  wsvqa           Westwood Studios VQA format
 D  wtv             Windows Television (WTV)
 D  wv              WavPack
 D  x11grab         X11grab
 D  xa              Maxis XA File Format
 D  xmv             Microsoft XMV
 D  xwma            Microsoft xWMA
 D  yop             Psygnosis YOP Format
 DE yuv4mpegpipe    YUV4MPEG pipe format
jiaaro commented 12 years ago

mp3 is listed with DE (decode, encode) so it should be fine... maybe it's because it can't write to the temp file. is your temp folder full?

$ df -h
asmedrano commented 12 years ago
df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       144G   60G   78G  44% /
udev            1.5G  4.0K  1.5G   1% /dev
tmpfs           585M  908K  584M   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            1.5G  1.8M  1.5G   1% /run/shm

BTW... I appreciate your hasty responses, I don't mean to keep you from anything else. I just happen not to be able to export to mp3. Its no real bother!

asmedrano commented 12 years ago

Could it be my OS?

Also here is the output of:

$ ffmpeg -y -f wav -i ./voice_2.wav -f mp3 ./out.mp3

ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jun 12 2012 16:37:58 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[wav @ 0x9be5a80] max_analyze_duration reached
Input #0, wav, from './voice_2.wav':
  Duration: 06:45:47.14, bitrate: 0 kb/s
    Stream #0.0: Audio: pcm_s32le, 22050 Hz, 1 channels, s32, 705 kb/s
Output #0, mp3, to './out.mp3':
    Stream #0.0: Audio: [0][0][0][0] / 0x0000, 22050 Hz, 1 channels, s32, 200 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Encoder (codec id 86017) not found for output stream #0.0

I missed that part of your comment.

jiaaro commented 12 years ago

hmmm.... looks like it's your ffmpeg install...

I don't think it's your OS, I run pydub in production on CentOS as well as Ubuntu server

asmedrano commented 12 years ago

Coolz. Maybe I picked up a weird version somehow. I'll do some more trouble shooting on it later on. Thanks!

bashuk commented 10 years ago

Hi there,

I have had the very same issue. All the key points (like 0 bytes output file and 'DE' for mp3 format) were the same. The problem is that by default ffmpeg installs without mp3 support (libmp3lame, to be precise).

The solution is to remove the ffmpeg installation, and manually build it from sources with libmp3lame support. For more details check out these links: http://superuser.com/questions/196857/how-to-install-libmp3lame-for-ffmpeg https://trac.ffmpeg.org/wiki/UbuntuCompilationGuide

UPD.: This solution only fixes the ffmpeg encoder behaviour, not the avconv.

jiaaro commented 10 years ago

@bashuk Hey, you'll also want to install libavcodec-extra-53 as shown in the ffmpeg setup notes from the readme

:)

jiaaro commented 10 years ago

@bashuk Any luck?

bashuk commented 10 years ago

Hey, @jiaaro! Sorry, I missed that you are waiting for the response.

As I wrote previously, I came up with the solution. Since I've built ffmpeg with libmp3lame support, everything works like a charm. Obviously, ffmpeg was missing that part.

Not sure about libavcodec-extra-53, to be honest - I didn't try that since the libmp3lame fixed everything. I can't recall installing libavcodec-extra-53 explicitly along with the ffmpeg, but who knows - maybe I had installed it some long time ago as a dependency for some other package. Hope this fully describes the situation I have.

Anyways, thanks a lot for keeping an eye on my issue, really appreciate that! :)

jiaaro commented 10 years ago

@bashuk Glad you got it working, thanks for the reply

yang commented 9 years ago

FWIW I'm also seeing the same issues on Ubuntu 12.04. I have installed libav-tools, libavcodec-extra-53, ffmpeg, libmp3lame0, and ubuntu-restricted-extras.

$ ffmpeg -formats
ffmpeg version 0.8.16-4:0.8.16-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
  built on Sep 16 2014 18:33:49 with gcc 4.6.3
The ffmpeg program is only provided for script compatibility and will be removed
in a future release. It has been deprecated in the Libav project to allow for
incompatible command line syntax improvements in its replacement called avconv
(see Changelog for details). Please use avconv instead.
File formats:
 D. = Demuxing supported
 .E = Muxing supported
 --
  E 3g2             3GP2 format
  E 3gp             3GP format
 D  4xm             4X Technologies format
 D  IFF             IFF format
 D  ISS             Funcom ISS format
 D  MTV             MTV format
 DE RoQ             raw id RoQ format
  E a64             a64 - video for Commodore 64
 D  aac             raw ADTS AAC
 DE ac3             raw AC-3
  E adts            ADTS AAC
 DE adx             CRI ADX
 D  aea             MD STUDIO audio
 DE aiff            Audio IFF
 DE alaw            PCM A-law format
 DE alsa            ALSA audio output
 DE amr             3GPP AMR file format
 D  anm             Deluxe Paint Animation
 D  apc             CRYO APC format
 D  ape             Monkey's Audio
 D  applehttp       Apple HTTP Live Streaming format
 DE asf             ASF format
  E asf_stream      ASF format
 DE ass             Advanced SubStation Alpha subtitle format
 DE au              SUN AU format
 DE avi             AVI format
  E avm2            Flash 9 (AVM2) format
 D  avs             AVS format
 D  bethsoftvid     Bethesda Softworks VID format
 D  bfi             Brute Force & Ignorance
 D  bink            Bink
 D  bmv             Discworld II BMV
 D  c93             Interplay C93
 D  caf             Apple Core Audio Format
 DE cavsvideo       raw Chinese AVS video
 D  cdg             CD Graphics Format
  E crc             CRC testing format
 DE daud            D-Cinema audio format
 D  dfa             Chronomaster DFA
 DE dirac           raw Dirac
 DE dnxhd           raw DNxHD (SMPTE VC-3)
 D  dsicin          Delphine Software International CIN format
 DE dts             raw DTS
 DE dv              DV video format
 D  dv1394          DV1394 A/V grab
  E dvd             MPEG-2 PS format (DVD VOB)
 D  dxa             DXA
 D  ea              Electronic Arts Multimedia Format
 D  ea_cdata        Electronic Arts cdata
 DE eac3            raw E-AC-3
 DE f32be           PCM 32 bit floating-point big-endian format
 DE f32le           PCM 32 bit floating-point little-endian format
 DE f64be           PCM 64 bit floating-point big-endian format
 DE f64le           PCM 64 bit floating-point little-endian format
 D  fbdev           Linux framebuffer
 DE ffm             FFM (AVserver live feed) format
 DE ffmetadata      FFmpeg metadata in text format
 D  film_cpk        Sega FILM/CPK format
 DE filmstrip       Adobe Filmstrip
 DE flac            raw FLAC
 D  flic            FLI/FLC/FLX animation format
 DE flv             FLV format
  E framecrc        framecrc testing format
  E framemd5        Per-frame MD5 testing format
 DE g722            raw G.722
  E gif             GIF Animation
 D  gsm             raw GSM
 DE gxf             GXF format
 DE h261            raw H.261
 DE h263            raw H.263
 DE h264            raw H.264 video format
 D  idcin           id Cinematic format
 DE image2          image2 sequence
 DE image2pipe      piped image2 sequence
 D  ingenient       raw Ingenient MJPEG
 D  ipmovie         Interplay MVE format
  E ipod            iPod H.264 MP4 format
 D  iv8             A format generated by IndigoVision 8000 video server
 DE ivf             On2 IVF
 D  jack            JACK Audio Connection Kit
 D  jv              Bitmap Brothers JV
 DE latm            LOAS/LATM
 D  libdc1394       dc1394 v.2 A/V grab
 D  lmlm4           lmlm4 raw format
 D  lxf             VR native stream format (LXF)
 DE m4v             raw MPEG-4 video format
  E matroska        Matroska file format
 D  matroska,webm   Matroska/WebM file format
  E md5             MD5 testing format
 DE mjpeg           raw MJPEG video
 DE mlp             raw MLP
 D  mm              American Laser Games MM format
 DE mmf             Yamaha SMAF
  E mov             MOV format
 D  mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG-4/Motion JPEG 2000 format
  E mp2             MPEG audio layer 2
 DE mp3             MPEG audio layer 3
  E mp4             MP4 format
 D  mpc             Musepack
 D  mpc8            Musepack SV8
 DE mpeg            MPEG-1 System format
  E mpeg1video      raw MPEG-1 video
  E mpeg2video      raw MPEG-2 video
 DE mpegts          MPEG-2 transport stream format
 D  mpegtsraw       MPEG-2 raw transport stream format
 D  mpegvideo       raw MPEG video
  E mpjpeg          MIME multipart JPEG format
 D  msnwctcp        MSN TCP Webcam stream
 DE mulaw           PCM mu-law format
 D  mvi             Motion Pixels MVI format
 DE mxf             Material eXchange Format
  E mxf_d10         Material eXchange Format, D-10 Mapping
 D  mxg             MxPEG clip file format
 D  nc              NC camera feed format
 D  nsv             Nullsoft Streaming Video
  E null            raw null video format
 DE nut             NUT format
 D  nuv             NuppelVideo format
 DE ogg             Ogg
 DE oma             Sony OpenMG audio
 DE oss             Open Sound System playback
 D  pmp             Playstation Portable PMP format
  E psp             PSP MP4 format
 D  psxstr          Sony Playstation STR format
 D  pva             TechnoTrend PVA file and stream format
 D  qcp             QCP format
 D  r3d             REDCODE R3D format
 DE rawvideo        raw video format
  E rcv             VC-1 test bitstream
 D  rl2             RL2 format
 DE rm              RealMedia format
 D  rpl             RPL/ARMovie format
 DE rso             Lego Mindstorms RSO format
 DE rtp             RTP output format
 DE rtsp            RTSP output format
 DE s16be           PCM signed 16 bit big-endian format
 DE s16le           PCM signed 16 bit little-endian format
 DE s24be           PCM signed 24 bit big-endian format
 DE s24le           PCM signed 24 bit little-endian format
 DE s32be           PCM signed 32 bit big-endian format
 DE s32le           PCM signed 32 bit little-endian format
 DE s8              PCM signed 8 bit format
 DE sap             SAP output format
 D  sdp             SDP
  E segment         segment muxer
 D  shn             raw Shorten
 D  siff            Beam Software SIFF
 DE smjpeg          Loki SDL MJPEG
 D  smk             Smacker video
 D  sol             Sierra SOL format
 DE sox             SoX native format
 DE spdif           IEC 61937 (used on S/PDIF - IEC958)
 DE srt             SubRip subtitle format
  E svcd            MPEG-2 PS format (VOB)
 DE swf             Flash format
 D  thp             THP
 D  tiertexseq      Tiertex Limited SEQ format
 D  tmv             8088flex TMV
 DE truehd          raw TrueHD
 D  tta             True Audio
 D  tty             Tele-typewriter
 D  txd             Renderware TeXture Dictionary
 DE u16be           PCM unsigned 16 bit big-endian format
 DE u16le           PCM unsigned 16 bit little-endian format
 DE u24be           PCM unsigned 24 bit big-endian format
 DE u24le           PCM unsigned 24 bit little-endian format
 DE u32be           PCM unsigned 32 bit big-endian format
 DE u32le           PCM unsigned 32 bit little-endian format
 DE u8              PCM unsigned 8 bit format
 D  vc1             raw VC-1
 D  vc1test         VC-1 test bitstream format
  E vcd             MPEG-1 System format (VCD)
 D  video4linux2    Video4Linux2 device grab
 D  vmd             Sierra VMD format
  E vob             MPEG-2 PS format (VOB)
 DE voc             Creative Voice file format
 D  vqf             Nippon Telegraph and Telephone Corporation (NTT) TwinVQ
 D  w64             Sony Wave64 format
 DE wav             WAV format
 D  wc3movie        Wing Commander III movie format
  E webm            WebM file format
 D  wsaud           Westwood Studios audio format
 D  wsvqa           Westwood Studios VQA format
 D  wtv             Windows Television (WTV)
 D  wv              WavPack
 D  x11grab         X11grab
 D  xa              Maxis XA File Format
 D  xmv             Microsoft XMV
 D  xwma            Microsoft xWMA
 D  yop             Psygnosis YOP Format
 DE yuv4mpegpipe    YUV4MPEG pipe format