[vlc-devel] RE :] Cannot play m3u file by libvlc exportfunctions?

Tue Dec 23 15:44:40 CET 2008

If you wanted to play back a whole playlist, the right thing to do with
libvlc could have been :

1. Create a new media_list 
   p_mlist = libvlc_media_list_new( ... )

2. Import content from a m3u file into the media_list
   libvlc_media_list_add_file_content( p_mlist, "your_file.m3u", ... )

3. Create a new media_list_player to run it
   p_mlp = libvlc_media_list_player_new( ... )

4. Attach the media_list to the media_list_player
   libvlc_media_list_player_set_media_list( p_mlp, p_mlist, ... )

5. Run the media_list_player
   libvlc_media_list_player_play( p_mlp, ...)

Unfortunately, media_list_player does not work at all! 

But, you still can do things ...

Actually, when you set up your m3u file as a media, and run it via a
media_player (which is what you did), a sublist was created at the media
level. This sublist (a media_list) is made of all the items of your
playlist. You can therefore retrieve them and play them as you wish. The
only thing is that nothing is automated. It is up to you to manage
things in your C/C++ code.

Erwan10

-----Message d'origine-----
De : vlc-devel-bounces at videolan.org
[mailto:vlc-devel-bounces at videolan.org] De la part de tony huang
Envoyé : mardi 23 décembre 2008 10:34
À : vlc-devel at videolan.org
Objet : Re: [vlc-devel] [vlc] Cannot play m3u file by libvlc
exportfunctions?

I've tried to enable message logger.
Below is the log info. (debug level)

00000076 5.06432056 [2264]  (3|main)CPU has capabilities 486 586 MMX
MMXEXT SSE SSE2 FPU 
00000077 5.06754923 [2264]  (3|main)looking for memcpy module: 3
candidates
00000078 5.06763077 [2264]  (3|main)using memcpy module "memcpymmxext"
00000079 5.07055807 [2264]  (3|main)thread 4620 (Interaction control)
created at priority 0 (interface/interaction.c:382)
00000080 5.07064009 [2264]  (3|main)thread started
00000081 5.07341385 [2264]  (3|main)Creating an input for 'Media
Library'
00000082 5.07349396 [2264]  (3|main)Input is a meta file: disabling
unneeded options
00000083 5.08319235 [2264]  (3|main)`file/xspf-open://C:\Documents and
Settings\tony.huang\Application Data\vlc\ml.xspf' gives access `file'
demux `xspf-open' path `C:\Documents and Settings\tony.huang\Application
Data\vlc\ml.xspf'
00000084 5.08720875 [2264]  (3|main)creating access 'file'
path='C:\Documents and Settings\tony.huang\Application Data\vlc\ml.xspf'
00000085 5.08771801 [2264]  (3|main)looking for access module: 2
candidates
00000086 5.08897638 [2264]  (3|access_file)opening file `C:\Documents
and Settings\tony.huang\Application Data\vlc\ml.xspf'
00000087 5.08905554 [2264]  (3|main)using access module "access_file"
00000088 5.12329006 [2264]  (3|main)TIMER module_Need() : 0.511 ms -
Total 0.511 ms / 1 intvls (Avg 0.511 ms)
00000089 5.12338400 [2264]  (3|main)Using AStream*Stream
00000090 5.13993502 [2264]  (3|main)pre-buffering...
00000091 5.14495087 [2264]  (3|main)received first data for our buffer
00000092 5.14562273 [2264]  (3|main)creating demux: access='file'
demux='xspf-open' path='C:\Documents and Settings\tony.huang\Application
Data\vlc\ml.xspf'
00000093 5.14569187 [2264]  (3|main)looking for demux module: 1
candidate
00000094 5.14575768 [2264]  (3|playlist)using XSPF playlist reader
00000095 5.14652348 [2264]  (3|main)using demux module "playlist"
00000096 5.15464401 [2264]  (3|main)TIMER module_Need() : 0.168 ms -
Total 0.168 ms / 1 intvls (Avg 0.168 ms)
00000097 5.15536594 [2264]  (3|main)`file/xspf-open://C:\Documents and
Settings\tony.huang\Application Data\vlc\ml.xspf' successfully opened
00000098 5.15543604 [2264]  (3|main)looking for xml module: 2 candidates
00000099 5.15657139 [2264]  (3|main)using xml module "xml"
00000100 5.15664816 [2264]  (3|main)TIMER module_Need() : 0.141 ms -
Total 0.141 ms / 1 intvls (Avg 0.141 ms)
00000101 5.16522408 [2264]  (3|playlist)parsed 0 tracks successfully
00000102 5.16817284 [2264]  (3|main)removing module "xml"
00000103 5.16925430 [2264]  (3|main)EOF reached
00000104 5.16934729 [2264]  (3|main)control type=1
00000105 5.17098856 [2264]  (3|main)removing module "playlist"
00000106 5.17106104 [2264]  (3|main)removing module "access_file"
00000107 5.17586470 [2264]  (3|main)TIMER input launching for 'Media
Library' : 7.450 ms - Total 7.450 ms / 1 intvls (Avg 7.450 ms)
00000108 5.17777300 [2264]  (3|main)waiting for thread initialization
00000109 5.17898321 [2264]  (3|main)thread started
00000110 5.18536091 [2264]  (3|main)thread 4696 (preparser) created at
priority 0 (playlist/thread.c:79)
00000111 5.19041252 [2264]  (3|main)waiting for thread initialization
00000112 5.19041491 [2264]  (3|main)thread started
00000113 5.19130039 [2264]  (3|main)thread 4708 (fetcher) created at
priority 0 (playlist/thread.c:108)
00000114 5.19253778 [2264]  (3|main)waiting for thread initialization
00000115 5.19352150 [2264]  (3|main)thread started
00000116 5.19359875 [2264]  (3|main)rebuilding array of current - root
Playlist
00000117 5.19468403 [2264]  (3|main)rebuild done - 0 items, index -1
00000118 5.19475746 [2264]  (3|main)thread 4704 (playlist) created at
priority 0 (playlist/thread.c:117)
00000119 5.19774342 [2264]  (3|main)looking for interface module: 1
candidate
00000120 5.20026875 [2264]  (3|main)using interface module "hotkeys"
00000121 5.20220327 [2264]  (3|main)TIMER module_Need() : 0.140 ms -
Total 0.140 ms / 1 intvls (Avg 0.140 ms)
00000122 5.20231581 [2264]  (3|main)thread 4728 (interface) created at
priority 0 (interface/interface.c:168)
00000123 5.20439672 [2264]  (3|main)thread started
00000124 5.20511055 [2264]  (3|main)Creating an input for
'youkuvideo15024248.m3u'
00000125 5.21229601 [2264]  (3|main)thread started
00000126 5.21298981 [2264]  (3|main)waiting for thread initialization
00000127 5.21510315 [2264]  (3|main)`M:\youkuvideo15024248.m3u' gives
access `' demux `' path `M:\youkuvideo15024248.m3u'
00000128 5.21518230 [2264]  (3|main)thread 4820 (input) created at
priority 1 (input/input.c:370)
00000129 5.23744345 [2264]  (3|main)creating demux: access='' demux=''
path='M:\youkuvideo15024248.m3u'
00000130 5.23837662 [2264]  (3|main)looking for access_demux module: 1
candidate
00000131 5.27288008 [2264]  (3|main)TIMER module_Need() : 43.179 ms -
Total 43.179 ms / 1 intvls (Avg 43.179 ms)
00000132 5.27351952 [2264]  (3|main)creating access ''
path='M:\youkuvideo15024248.m3u'
00000133 5.27660036 [2264]  (3|main)looking for access module: 5
candidates
00000134 5.27669573 [2264]  (3|vcd)trying .cue file:
M:\youkuvideo15024248.cue
00000135 5.27837515 [2264]  (3|vcd)could not find .cue file
00000136 5.27962637 [2264]  (3|access_file)opening file
`M:\youkuvideo15024248.m3u'
00000137 5.28179264 [2264]  (3|main)using access module "access_file"
00000138 5.28188229 [2264]  (3|main)TIMER module_Need() : 58.788 ms -
Total 58.788 ms / 1 intvls (Avg 58.788 ms)
00000139 5.29606628 [2264]  (3|main)Using AStream*Stream
00000140 5.29616070 [2264]  (3|main)pre-buffering...
00000141 5.29626179 [2264]  (3|main)received first data for our buffer
00000142 5.29695177 [2264]  (3|main)creating demux: access='' demux=''
path='M:\youkuvideo15024248.m3u'
00000143 5.29705524 [2264]  (3|main)looking for demux module: 59
candidates
00000144 5.29712915 [2264]  (3|playlist)found valid M3U playlist
00000145 5.29982328 [2264]  (3|main)using demux module "playlist"
00000146 5.29990149 [2264]  (3|main)TIMER module_Need() : 0.321 ms -
Total 0.321 ms / 1 intvls (Avg 0.321 ms)
00000147 5.30086946 [2264]  (3|main)looking for a subtitle file in M:\
00000148 5.30109978 [2264]  (3|main)`M:\youkuvideo15024248.m3u'
successfully opened
00000149 5.30195951 [2264]  (3|main)EOF reached
00000150 5.30203009 [2264]  (3|main)control type=1
00000151 5.31282854 [2264]  (3|main)control type=1

My program calling sequence as below.
1. load libvlc.dll
2. vlc_exception_init (&ex);
3. inst = vlc_new (sizeof(vlc_args) / sizeof(vlc_args[0]), vlc_args,
&ex);
4. m = vlc_media_new (inst, "M:\\youkuvideo15024248.m3u", &ex);
5. mp = vlc_media_player_new_from_media (m, &ex);
6. vlc_media_player_set_drawable (mp, drawable, &ex);
7. vlc_media_player_play (mp, &ex);

The content of m3u file as below.
key3_0.mpg
YOUKU_VIDEO_15024248_0.flv

I've checked the two files were playable by my simple player.
Why there nothing on the output window during play m3u file?

Tony Huang