unable to encode captured video from V4l2 dev using MPEG-4

[amsr]

Hi,

I have been trying to encode the video from a capture card to MPEG-4 using vlc 0.9.2 on fedora 9 for quite some time now but without any success. Iam able to view a captured video using VLC and but problem comes when i try to view an mpeg-4 encoded video. I have compiled latest the ffmpeg svn and installed it. Below is the debug logs of vlc, can someone pls help me out with what exactly is the problem is ?

Thanks,
amsr

-- logger module started --
main debug: CPU has capabilities 486 586 MMX MMXEXT SSE SSE2 FPU
main debug: looking for memcpy module: 3 candidates
main debug: using memcpy module "memcpymmxext"
main debug: thread 3085163408 (Interaction control) created at priority 0 (interface/interaction.c:382)
main debug: thread started
main debug: Creating an input for 'Media Library'
main debug: Input is a meta file: disabling unneeded options
main debug: `file/xspf-open:///home/amreddy/.local/share/vlc/ml.xspf' gives access `file' demux `xspf-open' path `/home/amreddy/.local/share/vlc/ml.xspf'
main debug: creating access 'file' path='/home/amreddy/.local/share/vlc/ml.xspf'
main debug: looking for access module: 3 candidates
access_mmap debug: opening file /home/amreddy/.local/share/vlc/ml.xspf
main debug: using access module "access_mmap"
main debug: TIMER module_Need() : 0.327 ms - Total 0.327 ms / 1 intvls (Avg 0.327 ms)
main debug: Using AStream*Block
main debug: pre buffering
main debug: received first data for our buffer
access_mmap debug: at end of memory mapped file
main debug: creating demux: access='file' demux='xspf-open' path='/home/amreddy/.local/share/vlc/ml.xspf'
main debug: looking for demux module: 1 candidate
playlist debug: using XSPF playlist reader
main debug: using demux module "playlist"
main debug: TIMER module_Need() : 0.259 ms - Total 0.259 ms / 1 intvls (Avg 0.259 ms)
main debug: `file/xspf-open:///home/amreddy/.local/share/vlc/ml.xspf' successfully opened
main debug: looking for xml module: 1 candidate
main debug: using xml module "xtag"
main debug: TIMER module_Need() : 0.127 ms - Total 0.127 ms / 1 intvls (Avg 0.127 ms)
access_mmap debug: at end of memory mapped file
playlist debug: parsed 0 tracks successfully
main debug: removing module "xtag"
main debug: EOF reached
main debug: control type=1
main debug: removing module "playlist"
main debug: removing module "access_mmap"
main debug: TIMER input launching for 'Media Library' : 2.420 ms - Total 2.420 ms / 1 intvls (Avg 2.420 ms)
main debug: waiting for thread initialization
main debug: thread started
main debug: thread 3073375120 (preparser) created at priority 0 (playlist/thread.c:79)
main debug: thread started
main debug: waiting for thread initialization
main debug: thread 3062885264 (fetcher) created at priority 0 (playlist/thread.c:108)
main debug: thread started
main debug: waiting for thread initialization
main debug: rebuilding array of current - root Playlist
main debug: rebuild done - 0 items, index -1
main debug: thread 3052395408 (playlist) created at priority 0 (playlist/thread.c:117)
main debug: looking for interface module: 1 candidate
main debug: using interface module "hotkeys"
main debug: TIMER module_Need() : 0.142 ms - Total 0.142 ms / 1 intvls (Avg 0.142 ms)
main debug: thread started
main debug: thread 3041905552 (interface) created at priority 0 (interface/interface.c:168)
main debug: looking for interface module: 1 candidate
main debug: using interface module "inhibit"
main debug: TIMER module_Need() : 1.783 ms - Total 1.783 ms / 1 intvls (Avg 1.783 ms)
main debug: thread started
main debug: thread 3031415696 (interface) created at priority 0 (interface/interface.c:168)
main debug: looking for interface module: 1 candidate
main debug: using interface module "screensaver"
main debug: TIMER module_Need() : 0.178 ms - Total 0.178 ms / 1 intvls (Avg 0.178 ms)
main debug: thread 3020925840 (interface) created at priority 0 (interface/interface.c:168)
main debug: thread started
main debug: looking for interface module: 18 candidates
main debug: using interface module "signals"
main debug: TIMER module_Need() : 0.149 ms - Total 0.149 ms / 1 intvls (Avg 0.149 ms)
main debug: thread 2999946128 (interface) created at priority 0 (interface/interface.c:168)
main debug: thread started
main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
main debug: looking for interface module: 3 candidates
main debug: using interface module "qt4"
main debug: TIMER module_Need() : 9.329 ms - Total 9.329 ms / 1 intvls (Avg 9.329 ms)
main debug: thread 2989456272 (interface) created at priority 0 (interface/interface.c:168)
main debug: thread started
qt4 debug: Error while initializing qt-specific localization
main debug: looking for interface module: 1 candidate
logger: using logger...
logger warning: no log filename provided, using `vlc-log.txt'
logger debug: opening logfile `vlc-log.txt'
main debug: using interface module "logger"
main debug: TIMER module_Need() : 2.110 ms - Total 2.110 ms / 1 intvls (Avg 2.110 ms)
main debug: thread started
main debug: thread 2978352016 (interface) created at priority 0 (interface/interface.c:168)
qt4 debug: Initialization of Capture device panel
qt4 debug: MRL passed to the Sout: v4l2:// :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2
qt4 debug: Sout mrl :sout=#transcode{vcodec=mp4v,vb=800,scale=1}:duplicate{dst=display}
main debug: adding item `Streaming' ( v4l2:// :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2 )
main debug: rebuilding array of current - root Playlist
main debug: rebuild done - 1 items, index -1
main debug: starting new item
main debug: processing request item Streaming node null skip 0
main debug: resyncing on Streaming
main debug: Streaming is at 0
main debug: creating new input thread
main debug: Creating an input for 'Streaming'
main debug: waiting for thread initialization
main debug: thread started
main debug: thread 2946329488 (input) created at priority 10 (input/input.c:368)
main debug: stream=`transcode'
main debug: looking for sout stream module: 1 candidate
main debug: stream=`duplicate'
main debug: looking for sout stream module: 1 candidate
stream_out_duplicate debug: creating 'duplicate'
stream_out_duplicate debug: * adding `display'
main debug: stream=`display'
main debug: looking for sout stream module: 1 candidate
main debug: using sout stream module "stream_out_display"
main debug: TIMER module_Need() : 0.895 ms - Total 0.895 ms / 1 intvls (Avg 0.895 ms)
main debug: using sout stream module "stream_out_duplicate"
main debug: TIMER module_Need() : 1.450 ms - Total 1.450 ms / 1 intvls (Avg 1.450 ms)
main debug: set config option: sout-transcode-vcodec to mp4v
main debug: set config option: sout-transcode-vb to 800
main debug: set config option: sout-transcode-scale to 1
stream_out_transcode debug: codec video=mp4v 0x0 scaling: 1.000000 800kb/s
main debug: using sout stream module "stream_out_transcode"
main debug: TIMER module_Need() : 7.444 ms - Total 7.444 ms / 1 intvls (Avg 7.444 ms)
main debug: `v4l2:// :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2' gives access `v4l2' demux `' path ` :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2'
main debug: creating demux: access='v4l2' demux='' path=' :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2'
main debug: looking for access_demux module: 1 candidate
v4l2 warning: unknown option v4l2-dev=/dev/video0
v4l2 warning: unknown option v4l2-standard=2
v4l2 warning: unknown option v4l2-input=2
v4l2 debug: main device=' '
v4l2 debug: trying device ' ' as video
v4l2 error: cannot open video device (No such file or directory)
v4l2 debug: trying device ' ' as audio
v4l2 error: cannot open device for OSS audio (No such file or directory)
v4l2 debug: opening '/dev/video0' as video
v4l2 debug: V4L2 device: LifeView/Typhoon FlyVIDEO2000 using driver: saa7134 (version: 0.2.14) on PCI:0000:07:0c.0
v4l2 debug: the device has the capabilities: (X) Video Capure, ( ) Audio, (X) Tuner
v4l2 debug: supported I/O methods are: (X) Read/Write, (X) Streaming, ( ) Asynchronous
v4l2 debug: video input 0 (Television) has type: Tuner adapter *
v4l2 debug: video input 1 (Composite1) has type: External analog input
v4l2 debug: video input 2 (Composite2) has type: External analog input
v4l2 debug: video input 3 (S-Video) has type: External analog input
v4l2 debug: video standard 0 is: PAL *
v4l2 debug: video standard 1 is: PAL-M
v4l2 debug: video standard 2 is: PAL-N
v4l2 debug: video standard 3 is: PAL-Nc
v4l2 debug: video standard 4 is: PAL-60
v4l2 debug: video standard 5 is: NTSC
v4l2 debug: video standard 6 is: SECAM
v4l2 debug: tuner 0 (Television) has type: Analog TV, frequency range: 0.0 kHz -> 268435455937.5 kHz
v4l2 debug: tuner 0 (Television) frequency: 0.0 kHz
v4l2 debug: device supports chroma GREY [8 bpp gray, GREY]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma RV15 [15 bpp RGB, le, RGBO]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device codec RGBQ (15 bpp RGB, be) not supported as access_demux
v4l2 debug: device supports chroma RV16 [16 bpp RGB, le, RGBP]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device codec RGBR (16 bpp RGB, be) not supported as access_demux
v4l2 debug: device supports chroma RV24 [24 bpp RGB, le, BGR3]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma RV24 [24 bpp RGB, be, RGB3]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma RV32 [32 bpp RGB, le, BGR4]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma RV32 [32 bpp RGB, be, RGB4]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma YUY2 [4:2:2 packed, YUYV, YUYV]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma YUYV [4:2:2 packed, YUYV, YUYV]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma UYVY [4:2:2 packed, UYVY, UYVY]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma I422 [4:2:2 planar, Y-Cb-Cr, 422P]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma I420 [4:2:0 planar, Y-Cb-Cr, YU12]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: device supports chroma YV12 [4:2:0 planar, Y-Cb-Cr, YV12]
v4l2 warning: Unable to query for frame sizes
v4l2 debug: Extended control API not supported by v4l2 driver
v4l2 debug: Available control: Brightness (980900)
v4l2 debug: integer control
v4l2 debug: valid values: 0 to 255 by steps of 1
v4l2 debug: default value: 128
v4l2 debug: current value: 128
v4l2 debug: Available control: Contrast (980901)
v4l2 debug: integer control
v4l2 debug: valid values: 0 to 127 by steps of 1
v4l2 debug: default value: 68
v4l2 debug: current value: 68
v4l2 debug: Available control: Saturation (980902)
v4l2 debug: integer control
v4l2 debug: valid values: 0 to 127 by steps of 1
v4l2 debug: default value: 64
v4l2 debug: current value: 64
v4l2 debug: Available control: Hue (980903)
v4l2 debug: integer control
v4l2 debug: valid values: -128 to 127 by steps of 1
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: Available control: Volume (980905)
v4l2 debug: integer control
v4l2 debug: valid values: -15 to 15 by steps of 1
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: Available control: Mute (980909)
v4l2 debug: boolean control
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: video audio-mute: 0
v4l2 debug: Available control: Mirror (980914)
v4l2 debug: boolean control
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: Available private control: Invert (8000000)
v4l2 debug: boolean control
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: Available private control: y offset odd field (8000001)
v4l2 debug: integer control
v4l2 debug: valid values: 0 to 128 by steps of 0
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: Available private control: y offset even field (8000002)
v4l2 debug: integer control
v4l2 debug: valid values: 0 to 128 by steps of 0
v4l2 debug: default value: 0
v4l2 debug: current value: 0
v4l2 debug: Available private control: automute (8000003)
v4l2 debug: boolean control
v4l2 debug: default value: 1
v4l2 debug: current value: 1
v4l2 debug: added new video es I420 720x576
main debug: selecting program id=0
v4l2 debug: opening '(null)' as audio
main debug: using access_demux module "v4l2"
main debug: TIMER module_Need() : 10.846 ms - Total 10.846 ms / 1 intvls (Avg 10.846 ms)
main debug: looking for packetizer module: 16 candidates
main debug: using packetizer module "rawvideo"
main debug: TIMER module_Need() : 0.929 ms - Total 0.929 ms / 1 intvls (Avg 0.929 ms)
main debug: thread started
main debug: thread 2933349264 (decoder) created at priority 0 (input/decoder.c:217)
main debug: starting in async mode
main debug: `v4l2:// :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2' successfully opened
qt4 debug: Updating the stream status: 3
main debug: control type=1
main debug: adding a new sout input (sout_input:0xa42f050)
stream_out_transcode debug: creating video transcoding from fcc=`I420' to fcc=`mp4v'
main debug: looking for decoder module: 22 candidates
main debug: using decoder module "rawvideo"
main debug: TIMER module_Need() : 12.042 ms - Total 12.042 ms / 1 intvls (Avg 12.042 ms)
main debug: looking for encoder module: 6 candidates
avcodec debug: libavcodec initialized (interface 3407872 )
avcodec debug: removing common factors from framerate
(mpeg4@0xa445d50)
avcodec debug: found encoder MPEG-4 Video
main debug: using encoder module "avcodec"
main debug: TIMER module_Need() : 5.171 ms - Total 5.171 ms / 1 intvls (Avg 5.171 ms)
main debug: removing module "avcodec"
stream_out_transcode debug: decoder aspect is 576000:432000
stream_out_transcode debug: source pixel aspect is 1.066667:1
stream_out_transcode debug: scaled pixel aspect is 1.066667:1
stream_out_transcode debug: source 720x576, destination 720x576
stream_out_transcode debug: encoder aspect is 576000:432000
stream_out_transcode debug: destination (after video filters) 720x576
message warning: message queue overflowed
main debug: no usable vout present, spawning one
main debug: window size: 768x576
main debug: switching to sync mode
main debug: looking for video output module: 4 candidates
main debug: looking for vout window module: 2 candidates
qt4 debug: waiting for interface...
qt4 debug: requesting window...
qt4 debug: Video was requested -1, -1
qt4 debug: Video is resizing to: 768 576
main debug: using vout window module "qt4"
main debug: TIMER module_Need() : 2.133 ms - Total 2.133 ms / 1 intvls (Avg 2.133 ms)
qt4 debug: Updating the geometry
x11 debug: XShm video extension v1.1 (without pixmaps, opcode: 145)
x11 debug: Window manager supports NetWM
x11 debug: Window manager supports _NET_WM_STATE_FULLSCREEN
x11 debug: Window manager supports _NET_WM_STATE_ABOVE
x11 debug: Window manager supports _NET_WM_STATE_BELOW
main debug: using video output module "x11"
main debug: TIMER module_Need() : 22.497 ms - Total 22.497 ms / 1 intvls (Avg 22.497 ms)
main debug: waiting for thread initialization
main debug: thread started
x11 debug: x11 image size 768x576 (0,0,768x576)
main debug: got 2 direct buffer(s)
main debug: picture in 720x576 (0,0,720x576), chroma I420, ar 4:3, sar 16:15
main debug: picture user 720x576 (0,0,720x576), chroma I420, ar 4:3, sar 16:15
main debug: picture out 768x576 (0,0,768x576), chroma RV32, ar 4:3, sar 1:1
main debug: looking for video filter2 module: 18 candidates
i420_rgb_sse2 debug: RGB pixel format is A8R8G8B8
main debug: using video filter2 module "i420_rgb_sse2"
main debug: TIMER module_Need() : 0.462 ms - Total 0.462 ms / 1 intvls (Avg 0.462 ms)
main debug: indirect render, mapping render pictures 0-7 to system pictures 2-9
main debug: thread 2906471312 (video output) created at priority 15 (video_output/video_output.c:504)
qt4 debug: New Event: type 1109
avcodec warning: ac-tex damaged at 0 0
(mpeg4@0xa447280)
avcodec warning: Error at MB: 0
(mpeg4@0xa447280)
avcodec debug: concealing 1620 DC, 1620 AC, 1620 MV errors
(mpeg4@0xa447280)
main debug: removing module "i420_rgb_sse2"
x11 debug: x11 image size 768x576 (0,0,768x576)
main debug: looking for video filter2 module: 18 candidates
i420_rgb_sse2 debug: RGB pixel format is A8R8G8B8
main debug: using video filter2 module "i420_rgb_sse2"
main debug: TIMER module_Need() : 0.153 ms - Total 0.153 ms / 1 intvls (Avg 0.153 ms)
main debug: looking for text renderer module: 2 candidates
freetype error: failed to load font file /usr/share/fonts/truetype/freefont/FreeSerifBold.ttf
main debug: using text renderer module "dummy"
main debug: TIMER module_Need() : 0.881 ms - Total 0.881 ms / 1 intvls (Avg 0.881 ms)
main debug: looking for video filter2 module: 18 candidates
scale debug: 32x32 -> 16x16
main debug: using video filter2 module "scale"
main debug: TIMER module_Need() : 3.684 ms - Total 3.684 ms / 1 intvls (Avg 3.684 ms)
main debug: looking for video filter2 module: 18 candidates
scale debug: 32x32 -> 16x16
main debug: using video filter2 module "scale"
main debug: TIMER module_Need() : 0.118 ms - Total 0.118 ms / 1 intvls (Avg 0.118 ms)
avcodec warning: rc buffer underflow
(mpeg4@0xa43cd40)
avcodec warning: I cbpc damaged at 1 0
(mpeg4@0xa447280)
avcodec warning: Error at MB: 1
(mpeg4@0xa447280)
avcodec debug: concealing 1620 DC, 1620 AC, 1620 MV errors
(mpeg4@0xa447280)
stream_out_transcode debug: late picture skipped (37998)
stream_out_transcode debug: late picture skipped (11449)
avcodec warning: rc buffer underflow
(mpeg4@0xa43cd40)
avcodec warning: I cbpc damaged at 1 0
(mpeg4@0xa447280)
avcodec warning: Error at MB: 1
(mpeg4@0xa447280)
avcodec debug: concealing 1620 DC, 1620 AC, 1620 MV errors
(mpeg4@0xa447280)
stream_out_transcode debug: late picture skipped (9133)
stream_out_transcode debug: late picture skipped (9295)
stream_out_transcode debug: late picture skipped (10797)
stream_out_transcode debug: late picture skipped (12585)
stream_out_transcode debug: late picture skipped (14038)
stream_out_transcode debug: late picture skipped (515)
avcodec warning: rc buffer underflow
(mpeg4@0xa43cd40)
avcodec warning: I cbpc damaged at 1 0
(mpeg4@0xa447280)
avcodec warning: Error at MB: 1
(mpeg4@0xa447280)
avcodec debug: concealing 1620 DC, 1620 AC, 1620 MV errors
(mpeg4@0xa447280)
stream_out_transcode debug: late picture skipped (9711)
stream_out_transcode debug: late picture skipped (1388)
stream_out_transcode debug: late picture skipped (1145)
avcodec warning: rc buffer underflow
(mpeg4@0xa43cd40)
avcodec warning: ac-tex damaged at 0 0
(mpeg4@0xa447280)
avcodec warning: Error at MB: 0
(mpeg4@0xa447280)
avcodec debug: concealing 1620 DC, 1620 AC, 1620 MV errors
(mpeg4@0xa447280)
stream_out_transcode debug: late picture skipped (23994)
stream_out_transcode debug: late picture skipped (16697)
stream_out_transcode debug: late picture skipped (173)
stream_out_transcode debug: late picture skipped (2760)
avcodec warning: rc buffer underflow
(mpeg4@0xa43cd40)
avcodec warning: ac-tex damaged at 0 0
(mpeg4@0xa447280)
avcodec warning: Error at MB: 0
(mpeg4@0xa447280)
avcodec debug: concealing 1620 DC, 1620 AC, 1620 MV errors
(mpeg4@0xa447280)
stream_out_transcode debug: late picture skipped (62512)
stream_out_transcode debug: late picture skipped (22979)
stream_out_transcode debug: late picture skipped (89492)
stream_out_transcode debug: late picture skipped (49952)
stream_out_transcode debug: late picture skipped (10417)
stream_out_transcode debug: late picture skipped (23471)
stream_out_transcode debug: late picture skipped (26674)
stream_out_transcode debug: late picture skipped (25680)
stream_out_transcode debug: late picture skipped (2207)
avcodec warning: rc buffer underflow
(mpeg4@0xa43cd40)
avcodec warning: I cbpc damaged at 1 0
(mpeg4@0xa447280)

[dionoea]

Could you please post the command line you're using to capture the video? (Or give us the exact configuration options you set in the graphical interface)

[amsr]

Hi,

Thanks for following up!!! it is evident from logs what is being passed to VLC which i have highlighted

qt4 debug: MRL passed to the Sout: v4l2:// :v4l2-dev=/dev/video0 :v4l2-standard=2 :v4l2-input=2
qt4 debug: Sout mrl :sout=#transcode{vcodec=mp4v,vb=800,scale=1}:duplicate{dst=display}.

But for your convenience i will still mention what i have done on the graphical interface

./vlc ---> choosen Media --->Open Capture device --> then i chose more options --> and putting in following text gives me a video output displayed on my screen (So no problem with capture part, correct driver has been loaded and video capture works with Tvtime player as well)
v4l2:// :v4l2-dev="/dev/video0" :v4l2-standard=2 :v4l2-input=2
(default chroma format used by vlc is I420 ?)

But when i use "convert to" option instead of play then i do not see any video on my screen.
I chose folowing things on convert screen
Outputs-->play locally
Profile---> encapsualtion->mp4
Profile--->Video Codec --> (MPEG-4, bitrate = 512kbps, scale=1)
Output string ":sout=#transcode{vcodec=mp4v,vb=512,scale=1}:duplicate{dst=display}"

I have compiled ffmpeg svn using following options
---> installed dependent libraries
$./configure --prefix=/usr --disable-static --enable-shared --enable-gpl --enable-pp --enable-swscaler --enable-libmp3lame --enable-libtheora --enable-liba52 --enable-libgsm --enable-postproc --enable-libxvid --enable-libfaac --enable-pthreads --enable-libvorbis --enable-libfaad --enable-gpl --enable-x11grab
$make
$sudo make install

then compiled vlc with ./configure --enable-live555. Basically my idea is to stream the live video output in mp4 format but iam facing the problem with encoding part.Do enable to any extra flags or options for ffmpeg or vlc?

I was facing a strange error when i was using command line and vlc dumping core. I will post that when i double check the syntax.

Please let me know if u need anything else and help me out on this.

Thanks,
amsr

[amsr]

correction in the configure options of ffmpeg, sorry for the typo

$./configure --prefix=/usr --disable-static --enable-shared --enable-gpl --enable-postproc --enable-swscale --enable-libmp3lame --enable-libtheora --enable-liba52 --enable-libgsm --enable-postproc --enable-libxvid --enable-libfaac --enable-pthreads --enable-libvorbis --enable-libfaad --enable-gpl --enable-x11grab

[amsr]

Hi,

I installed VLC on my laptop again Fedora 9, and iam able to successfully capture video from laptop integrated webcam and encode it using mpeg-4 as well. But still not able to address my original problem from Capture card. From the debugs logs i see for the capture card

stream_out_transcode debug: creating video transcoding from fcc=`I420' to fcc=`mp4v'

what i could figure from the successful and unsuccessful logs is chrome format seems to be difference. For the unsuccessful case)(I420 to mp4v), VLC doesn't seem to find the right video_filter2(as seen from logs, i have no idea what this video filter is). Can some vlc-expert look into this, i do not see any activity on my post except dineo asking for extra information.


For my webcam where i encode captured video successfully below are the logs with some highlights

main debug: `v4l2:// :v4l2-dev=/dev/video0 :v4l2-standard=0' successfully opened
qt4 debug: New Event: type 1108
qt4 debug: New Event: type 1103
qt4 debug: Updating the stream status: 3
rawvideo warning: invalid frame size (4156 < 38400)
main debug: control type=1
main debug: adding a new sout input (sout_input:0x99e9b40)
stream_out_transcode debug: creating video transcoding from fcc=`YUY2' to fcc=`mp4v'
main debug: looking for decoder module: 22 candidates
main debug: using decoder module "rawvideo"
main debug: TIMER module_Need() : 8.715 ms - Total 8.715 ms / 1 intvls (Avg 8.715 ms)
main debug: looking for encoder module: 6 candidates
avcodec debug: libavcodec initialized (interface 3355137 )
avcodec debug: removing common factors from framerate
(mpeg4@0x9c0e920)
avcodec debug: found encoder MPEG-4 Video
main debug: using encoder module "avcodec"
main debug: TIMER module_Need() : 5.167 ms - Total 5.167 ms / 1 intvls (Avg 5.167 ms)
main debug: removing module "avcodec"
stream_out_transcode debug: decoder aspect is 576000:432000
stream_out_transcode debug: source pixel aspect is 1.000000:1
stream_out_transcode debug: scaled pixel aspect is 1.000000:1
stream_out_transcode debug: source 160x120, destination 160x120
stream_out_transcode debug: encoder aspect is 576000:432000
main debug: looking for video filter2 module: 19 candidates
swscale debug: 160x120 chroma: YUY2 -> 160x120 chroma: I420 with scaling using Bicubic (good quality)
main debug: using video filter2 module "swscale"
main debug: TIMER module_Need() : 0.905 ms - Total 0.905 ms / 1 intvls (Avg 0.905 ms)
main debug: Filter 'swscale' (0x9c0fffc) appended to chain
stream_out_transcode debug: destination (after video filters) 160x120
main debug: looking for encoder module: 6 candidates
avcodec debug: libavcodec already initialized
avcodec debug: removing common factors from framerate
(mpeg4@0x9c03640)
message warning: message queue overflowed
avcodec debug: ffmpeg codec (MPEG-4 Video) started
main debug: using decoder module "avcodec"
main debug: TIMER module_Need() : 3.426 ms - Total 3.426 ms / 1 intvls (Avg 3.426 ms)
main debug: thread started
main debug: thread 2925349776 (decoder) created at priority 0 (input/decoder.c:217)
stream_out_duplicate debug: - added for output 0
avcodec debug: disabling direct rendering
main debug: no usable vout present, spawning one
main debug: window size: 160x120
main debug: looking for video output module: 6 candidates
main debug: switching to sync mode
xvideo warning: no free XVideo port found for format 0x30323449 (I420)
xvideo warning: no free XVideo port found for format 0x32595559 (YUY2)
xvideo warning: no free XVideo port found for format 0x36315652 (RV16)
main debug: looking for vout window module: 2 candidates
qt4 debug: waiting for interface...
qt4 debug: requesting window...
qt4 debug: Video was requested -1, -1
qt4 debug: Video is resizing to: 160 120
qt4 debug: embedded video ready (handle 0x44000a0)
main debug: using vout window module "qt4"
main debug: TIMER module_Need() : 1.959 ms - Total 1.959 ms / 1 intvls (Avg 1.959 ms)
qt4 debug: Updating the geometry
qt4 debug: size: 237 - 347
qt4 debug: sizeHint: 237 - 160
qt4 debug: size: 237 - 347
qt4 debug: sizeHint: 237 - 160
x11 debug: XShm video extension v1.1 (with pixmaps, opcode: 144)
x11 debug: Window manager supports NetWM
x11 debug: Window manager supports _NET_WM_STATE_FULLSCREEN
x11 debug: Window manager supports _NET_WM_STATE_ABOVE
x11 debug: Window manager supports _NET_WM_STATE_BELOW
main debug: using video output module "x11"
main debug: TIMER module_Need() : 160.113 ms - Total 160.113 ms / 1 intvls (Avg 160.113 ms)
main debug: waiting for thread initialization
main debug: thread started
x11 debug: x11 image size 640x480 (0,0,640x480)
main debug: got 2 direct buffer(s)
main debug: picture in 160x120 (0,0,160x120), chroma I420, ar 4:3, sar 1:1
main debug: picture user 160x120 (0,0,160x120), chroma I420, ar 4:3, sar 1:1
main debug: picture out 640x480 (0,0,640x480), chroma RV32, ar 4:3, sar 1:1
main debug: looking for video filter2 module: 19 candidates
swscale debug: 160x120 chroma: I420 -> 640x480 chroma: RV32 with scaling using Bicubic (good quality)
main debug: using video filter2 module "swscale"
main debug: TIMER module_Need() : 3.213 ms - Total 3.213 ms / 1 intvls (Avg 3.213 ms)
main debug: indirect render, mapping render pictures 0-7 to system pictures 2-9
main debug: thread 2914859920 (video output) created at priority 15 (video_output/video_output.c:504)
qt4 debug: New Event: type 1109
main debug: looking for text renderer module: 2 candidates
freetype error: failed to load font file /usr/share/fonts/truetype/freefont/FreeSerifBold.ttf
main debug: using text renderer module "dummy"
main debug: TIMER module_Need() : 1.146 ms - Total 1.146 ms / 1 intvls (Avg 1.146 ms)
main debug: looking for video filter2 module: 19 candidates
swscale debug: 32x32 chroma: YUVA -> 16x16 chroma: YUVA with scaling using Bicubic (good quality)
main debug: using video filter2 module "swscale"
main debug: TIMER module_Need() : 4.788 ms - Total 4.788 ms / 1 intvls (Avg 4.788 ms)
main debug: looking for video filter2 module: 19 candidates
scale debug: 32x32 -> 16x16
main debug: using video filter2 module "scale"
main debug: TIMER module_Need() : 1.308 ms - Total 1.308 ms / 1 intvls (Avg 1.308 ms)
main debug: removing module "swscale"
x11 debug: x11 image size 640x480 (0,0,640x480)
main debug: looking for video filter2 module: 19 candidates
swscale debug: 160x120 chroma: I420 -> 640x480 chroma: RV32 with scaling using Bicubic (good quality)
main debug: using video filter2 module "swscale"
main debug: TIMER module_Need() : 1.641 ms - Total 1.641 ms / 1 intvls (Avg 1.641 ms)
main debug: removing module "swscale"
x11 debug: x11 image size 160x120 (0,0,160x120)
main debug: looking for video filter2 module: 19 candidates
swscale debug: 160x120 chroma: I420 -> 160x120 chroma: RV32 with scaling using Bicubic (good quality)
main debug: using video filter2 module "swscale"
main debug: TIMER module_Need() : 0.220 ms - Total 0.220 ms / 1 intvls (Avg 0.220 ms)
main warning: late picture skipped (-2389)
avcodec warning: header damaged
(mpeg4@0x9bfe830)
avcodec warning: cannot decode one frame (3408 bytes)
main warning: late picture skipped (123491)
main warning: late picture skipped (90323)
main warning: late picture skipped (57044)
main warning: late picture skipped (23841)
avcodec warning: header damaged
(mpeg4@0x9bfe830)


Also for my webcam capture when i run from command line ./vlc -vvv --reset-config --no-audio v4l2:// :v4l2-dev="/dev/video0" :sout=#transcode{vcodec=mp4v,vb=256,scale=1}:duplicate{dst=display}, i get the below error. Strangely i use the same thing through GUI, it works. Can someone correct me iam doing something wrong.

1] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[00000363] main interface debug: looking for interface module: 3 candidates
[00000363] main interface debug: using interface module "qt4"
[00000363] main interface debug: TIMER module_Need() : 155.941 ms - Total 155.941 ms / 1 intvls (Avg 155.941 ms)
[00000363] main interface debug: thread 2989865872 (interface) created at priority 0 (interface/interface.c:168)
[00000363] main interface debug: thread started
[00000329] main playlist debug: rebuilding array of current - root Playlist
[00000329] main playlist debug: rebuild done - 1 items, index -1
[00000329] main playlist debug: starting new item
[00000329] main playlist debug: processing request item null node Playlist skip 0
[00000329] main playlist debug: creating new input thread
[00000367] main input debug: Creating an input for 'v4l2://'
[00000367] main input debug: waiting for thread initialization
[00000367] main input debug: thread started
[00000367] main input debug: thread 2979376016 (input) created at priority 10 (input/input.c:368)
[00000368] main stream output debug: stream=`transcodescale=1'
[00000369] main stream out debug: looking for sout stream module: 0 candidates
[00000369] main stream out error: no sout stream module matched "transcodescale=1"
[00000369] main stream out debug: TIMER module_Need() : 0.148 ms - Total 0.148 ms / 1 intvls (Avg 0.148 ms)
[00000369] main stream out debug: destroying chain... (name=transcodescale=1)
[00000369] main stream out debug: destroying chain done
[00000368] main stream output error: stream chain failed for `transcodescale=1:duplicate{dst=display}'
[00000367] main input error: cannot start stream output instance, aborting
[00000329] main playlist debug: finished input
[00000329] main playlist debug: dying input
[00000329] main playlist debug: dying input
[00000367] main input debug: thread ended
[00000329] main playlist debug: dead input
[00000367] main input debug: thread 2979376016 joined (playlist/engine.c:244)
[00000367] main input debug: Destroying the input for 'v4l2://'
[00000367] main input debug: TIMER input launching for 'v4l2://' : 102.319 ms - Total 102.319 ms / 1 intvls (Avg 102.319 ms)
[00000329] main playlist debug: starting new item
[00000329] main playlist debug: changing item without a request (current 0/1)
[00000329] main playlist debug: nothing to play

Please help !!!

Regards,
amsr