Hi, I have a strange problem: If I record from TV everything goes well. If I record from composite, around one frame per minute gets dropped: ---------------------- Pos: 171,2s 4277f ( 0%) 25fps Trem: 0min 0mb A-V:0,000 [2001:127] A/Vms 3/18 D/B/S 3/1/1 ----------------------- I use the following command to record from my saa7134 card: mencoder tv:// -tv driver=v4l2:width=720:height=576:input=2:alsa:contrast=-5:saturation=0 \ -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2000:vhq:psnr \ -oac mp3lame -lameopts cbr:br=128 \ -vf crop=688:544:16:16,pp=fd,scale=576:432 -sws 2 \ -o Video-`date +%d.%m.-%H%MUhr`.avi -v If I change input=2 to input=0 (TV) I get zero dropped frames. CPU utilization is around 50%. What can I do to suppress framedrops and to ensure audio-video synchronization? Board is a nforce2; Alsa 0.96, kernel 2.4.20 ############################################################ MEncoder dev-CVS-030830-12:37-3.3 (C) 2000-2003 MPlayer Team CPU: Advanced Micro Devices (Family: 6, Stepping: 0) Detected cache-line size is 64 bytes CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0 Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE Reading /home/mw/.mplayer/codecs.conf: Can't open '/home/mw/.mplayer/codecs.conf': Datei oder Verzeichnis nicht gefunden Reading /etc/mplayer/codecs.conf: 60 audio & 151 video codecs File not found: 'frameno.avi' Failed to open frameno.avi Reading config file /home/mw/.mplayer/mencoder: Datei oder Verzeichnis nicht gefunden init_freetype Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay STREAM: [null] tv:// STREAM: Description: Null stream STREAM: Author: Albeu STREAM: Comment: success: format: 9 data: 0x0 - 0x0 TV detected! ;-) Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski <olschewski@zpr.uni-koeln.de> comment: first try, more to come ;-) Selected device: KNC One TV-Station RDS Tuner cap: STEREO LANG1 LANG2 Tuner rxs: MONO Capabilites: video capture video overlay VBI capture device tuner read/write streaming supported norms: 0 = PAL; 1 = NTSC; 2 = SECAM; inputs: 0 = Television; 1 = Composite1; 2 = Composite2; Current input: 2 Format GREY ( 8 bits, 8 bpp gray): Planar Y800 Format RGB555 (16 bits, 15 bpp RGB, le): RGB 15-bit Format RGB555X (16 bits, 15 bpp RGB, be): Unknown Format RGB565 (16 bits, 16 bpp RGB, le): RGB 16-bit Format RGB565X (16 bits, 16 bpp RGB, be): Unknown Format BGR24 (24 bits, 24 bpp RGB, le): BGR 24-bit Format BGR32 (32 bits, 32 bpp RGB, le): BGR 32-bit Format RGB32 (32 bits, 32 bpp RGB, be): RGB 32-bit Format YUYV (16 bits, 4:2:2 packed, YUYV): Packed YUY2 Format UYVY (16 bits, 4:2:2 packed, UYVY): Packed UYVY Format YUV422P (16 bits, 4:2:2 planar, Y-Cb-Cr): Planar 422P Format YUV420 (12 bits, 4:2:0 planar, Y-Cb-Cr): Planar I420 Current format: BGR24 v4l2: current audio mode is : MONO v4l2: set Volume: 17985 [-15, 15] Plug PCM: Route conversion PCM (sformat=S16_LE) Transformation table: 0 <- 0*0,5 + 1*0,5 Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 16384 period_size : 4096 period_time : 92879 tick_time : 10000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 4096 xfer_align : 4096 start_threshold : 0 stop_threshold : 16384 silence_threshold: 0 silence_size : 0 boundary : 1073741824 Slave: Hardware PCM card 0 'NVidia NForce2' device 0 subdevice 0 Its setup is: stream : CAPTURE access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 16384 period_size : 4096 period_time : 92879 tick_time : 10000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 4096 xfer_align : 4096 start_threshold : 0 stop_threshold : 16384 silence_threshold: 0 silence_size : 0 boundary : 1073741824 v4l2: set format: YUV420 v4l2: set input: 2 v4l2: set width: 720 v4l2: set height: 576 Selected channel list: europe-east (including 133 channels) Current frequency: 884 (55,250) ==> Found video stream: 0 v4l2: get format: YUV420 v4l2: get fps: 25,000000 v4l2: get width: 720 v4l2: get height: 576 v4l2: set audio samplerate: 44100 Plug PCM: Route conversion PCM (sformat=S16_LE) Transformation table: 0 <- 0*0,5 + 1*0,5 Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 16384 period_size : 4096 period_time : 92879 tick_time : 10000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 4096 xfer_align : 4096 start_threshold : 0 stop_threshold : 16384 silence_threshold: 0 silence_size : 0 boundary : 1073741824 Slave: Hardware PCM card 0 'NVidia NForce2' device 0 subdevice 0 Its setup is: stream : CAPTURE access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 16384 period_size : 4096 period_time : 92879 tick_time : 10000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 4096 xfer_align : 4096 start_threshold : 0 stop_threshold : 16384 silence_threshold: 0 silence_size : 0 boundary : 1073741824 v4l2: get audio format: 16 ==> Found audio stream: 0 v4l2: get audio samplerate: 44100 v4l2: get audio samplesize: 2 v4l2: get audio channels: 1 TV audio: 1 channels, 16 bits, 44100 Hz Audio capture - buffer 256 blocks of 8192 bytes, skew average from 16 meas. Using a ring buffer for maximum 423 frames, 250 MB total size. v4l2: set Brightness: 128 [0, 255] v4l2: set Hue: 0 [-128, 127] v4l2: set Saturation: 64 [0, 127] v4l2: set Contrast: 65 [0, 127] [V] filefmt:9 fourcc:0x32315659 size:720x576 fps:25,00 ftime:=0,0400 ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder dec_audio: Allocating 2048 + 65536 = 67584 bytes for output buffer AUDIO: 44100 Hz, 1 ch, 16 bit (0x10), ratio: 88200->88200 (705,6 kbit) Selected audio codec: [pcm] afm:pcm (Uncompressed PCM) ========================================================================== Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1 (-1=autodetect) osd: 1 Opening video filter: [scale w=576 h=432] SwScale params: 576 x 432 (-1=no scaling) Opening video filter: [pp=fd] [scale] query(Planar YV12) -> 1 [scale] query(Planar I420) -> 1 [scale] query(Planar IYUV) -> 1 [scale] query(Planar 444P) -> 1 [scale] query(Planar 422P) -> 1 [scale] query(Planar 411P) -> 1 Opening video filter: [crop w=688 h=544 x=16 y=16] Crop: 688 x 544, 16 ; 16 ========================================================================== Opening video decoder: [raw] RAW Uncompressed Video VDec: vo config request - 720 x 576 (preferred csp: Planar YV12) [PP] Using external postprocessing filter, max q = 6. Trying filter chain: crop pp scale expand lavc VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is undefined - no prescaling applied. VO Config (720x576->720x576,flags=0,'MPlayer',0x32315659) REQ: flags=0xC41 req=0x400 REQ: flags=0x441 req=0x0 SwScaler: reducing / aligning filtersize 6 -> 8 SwScaler: reducing / aligning filtersize 6 -> 8 SwScaler: reducing / aligning filtersize 7 -> 5 SwScaler: reducing / aligning filtersize 7 -> 5 SwScaler: BICUBIC scaler, from Planar YV12 to Planar YV12 using MMX2 SwScaler: using 8-tap MMX scaler for horizontal luminance scaling SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling SwScaler: using n-tap MMX scaler for vertical scaling (YV12 like) SwScaler: 688x544 -> 576x432 REQ: flags=0x401 req=0x0 REQ: flags=0x401 req=0x0 videocodec: libavcodec (576x432 fourcc=58564944 [DIVX]) High quality encoding selected (non real time)! Selected video codec: [rawyv12] vfm:raw (RAW YV12) ========================================================================== MP3 audio selected Building audio filter chain for 44100Hz/1ch/16bit -> 44100Hz/1ch/16bit... [libaf] Adding filter dummy [dummy] Was reinitialized, rate=44100Hz, nch = 1, format = 0x00000001 and bps = 2 [dummy] Was reinitialized, rate=44100Hz, nch = 1, format = 0x00000001 and bps = 2 Writing AVI header... LAME version 3.93 (http://www.mp3dev.org/) Using polyphase lowpass filter, transition band: 20094 Hz - 20627 Hz misc: scaling: 0,000000 ch0 (left) scaling: 0,000000 ch1 (right) scaling: 0,000000 filter type: 0 quantization: ISO huffman search: normal experimental X=0 Y=0 Z=0 ... stream format: MPEG-1 Layer 3 1 channel - mono padding: auto constant bitrate - CBR ... psychoacoustic: tonality estimation limit: 8871,700195 Hz using short blocks: allowed adjust masking: 0,000000 dB psymodel: 1 noise shaping: 1 ^ amplification: 0 ^ stopping: 0 ATH: using ^ type: 2 ^ adjust type: 0 ^ adapt threshold type: 2 using temporal masking effect: yes interchannel masking ratio: 0,000000 ... Forcing audio preload to 0, max pts correction to 0 v4l2: going to capture *** [crop] Exporting mp_image_t, 720x576x12bpp YUV planar, 622080 bytes *** [pp] Exporting mp_image_t, 688x544x12bpp YUV planar, 561408 bytes *** [scale] Allocating mp_image_t, 688x544x12bpp YUV planar, 561408 bytes *** [lavc] Allocating mp_image_t, 576x432x12bpp YUV planar, 373248 bytes *** [expand] Direct Rendering mp_image_t, 576x432x12bpp YUV planar, 373248 bytes get_path('subfont.ttf') -> '/home/mw/.mplayer/subfont.ttf' New_Face failed. Maybe the font path is wrong. Please supply the text font file (~/.mplayer/subfont.ttf). subtitle font: load_sub_face failed. Pos: 171,2s 4277f ( 0%) 25fps Trem: 0min 0mb A-V:0,000 [2001:127] A/Vms 3/18 D/B/S 3/1/1 <CTRL C> CBR audio: 16000 bytes/sec, 418 bytes/block Writing AVI index... Fixing AVI header... Video stream: 2001,834 kbit/s (250229 bps) size: 42829238 bytes 171,160 secs 4277 frames Audio stream: 128,000 kbit/s (15999 bps) size: 2738050 bytes 171,128 secs uninit video: raw PSNR: Y:37,53, Cb:43,23, Cr:43,79, All:38,77 DEMUXER: freeing demuxer at 0x846ddc8 v4l2: 4280 frames successfully processed, 3 frames dropped. v4l2: up to 4 video frames buffered. DEMUXER: freeing sh_audio at 0x8476ef0 DEMUXER: freeing sh_video at 0x8476e58 mw@K6:~/TV/video>