Hi, I have been trying to make a .3gp file for my mobile phone. I want to use mencoder instead of ffmpeg but am having a problem with the amr audio codecs it seems. My experimental command line (without any of the bitrate/fps etc. arguments needed eventually) is /usr/local/bin/mencoder stream.dump -oac lavc -ovc lavc -lavcopts vcodec=h263p:acodec=amr_nb -of lavf -o movie.3gp which gives the error " Couldn't find wav tag for specified codec, exit " If I change to -oac pcm then the error dissapears. I compiled mplayer/mencoder from cvs and included all the amr stuff and libavformat. I am also able to play a sample .3gp file made using ffmpeg which implies that amr_nb is indeed compiled into mplayer correctly at least. Here is the output of mplayer -v test.3gp so you can see what I am trying to reproduce. http://pastebin.com/314426 What could be the problem? Is amr_nb encoding not in fact supported in mencoder? Is -of lavf not working? Raphael P.S. Here is the complete output of /usr/local/bin/mencoder -v stream.dump -oac lavc -ovc lavc -lavcopts vcodec=h263p:acodec=amr_nb -of lavf -o movie.3gp -bash-2.05b$ /usr/local/bin/mencoder -v stream.dump -oac lavc -ovc lavc -lavcopts vcodec=h263p:acodec=amr_nb -of lavf -o movie.3gp MEncoder dev-CVS-050715-15:59-3.3.2 (C) 2000-2005 MPlayer Team CPU: Intel Pentium 4/Xeon/Celeron Foster (Family: 8, Stepping: 4) Detected cache-line size is 64 bytes CPUflags: Type: 8 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 86 audio & 200 video codecs File not found: 'frameno.avi' Failed to open frameno.avi init_freetype get_path('font/font.desc') -> '/home/raph/.mplayer/font/font.desc' font: can't open file: /home/raph/.mplayer/font/font.desc font: can't open file: /usr/local/share/mplayer/font/font.desc Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay [file] File size is 74010624 bytes STREAM: [file] stream.dump STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) success: format: 0 data: 0x0 - 0x4695000 Checking for YUV4MPEG2 ASF_check: not ASF guid! Checking for Nullsoft Streaming Video Checking for NuppelVideo Checking for REAL REAL file format detected. real: Header size: 18 real: Header object version: 0 real: File version: 0 Chunk: PROP (504f5250) (size: 0x32, offset: 0x12) First index chunk offset: 0x0 First data chunk offset: 0x171 Flags (2): [perfect play (more buffers)] Chunk: CONT (544e4f43) (size: 0x15, offset: 0x44) Chunk: MDPR (5250444d) (size: 0x99, offset: 0x59) Found new stream (id: 0) Stream description: Audio Stream Stream mimetype: audio/x-pn-realaudio ==> Found audio stream: 0 Found audio stream! version: 4 header size: 57 frame_size: 304 sub_packet_size: 0 samplerate: 8000, channels: 1 skip_str: 4 bytes skipped read_str: 4 bytes read ======= WAVE Format ======= Format Tag: 26995 (0x6973) Channels: 1 Samplerate: 8000 avg byte/sec: 8500 Block align: 304 bits/sample: 16 cbSize: 10 Unknown extra header dump: [0] [0] [6] [0] [1] [0] [30] [1] [0] [0] =========================== ### skipping 2 bytes of codec info Chunk: MDPR (5250444d) (size: 0x75, offset: 0xf2) Found new stream (id: 1) Stream description: Video Stream Stream mimetype: video/x-pn-realvideo ==> Found video stream: 1 video fourcc: RV30 (30335652) H.263 ID: 30203002 unknown id: 30203002 ### skipping 0 bytes of codec info Chunk: DATA (41544144) (size: 0x46076a9, offset: 0x167) Packets in file: 110091 Auto-selected RM audio ID = 0 Auto-selected RM video ID = 1 VIDEO: RV30 [30203002,000A9030] 320x240 (aspect 0.00) 15.00 fps VIDEO: [RV30] 320x240 24bpp 15.000 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:11 fourcc:0x30335652 size:320x240 fps:15.00 ftime:=0.0667 ========================================================================== Opening audio decoder: [realaud] RealAudio decoder opening shared obj '/usr/lib/codecs/sipr.so.6.0' Audio codec: [1] 8.5 Kbps Voice Audio bitrate: 8.500 kbit/s (1063 bps) dec_audio: Allocating 1824 bytes for input buffer. dec_audio: Allocating 128000 + 65536 = 193536 bytes for output buffer. AUDIO: 8000 Hz, 1 ch, s16le, 8.5 kbit/6.64% (ratio: 1063->16000) Selected audio codec: [rasipr] afm:realaud (RealAudio Sipro) ========================================================================== OK, exit ALLOCATED STREAM N. 1, type=0 Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 ========================================================================== Opening video decoder: [realvid] RealVideo decoder realvideo codec id: 0x30203002 sub-id: 0x000A9030 opening shared obj '/usr/lib/codecs/drvc.so' INFO: RealVideo codec init OK! Selected video codec: [rv3040] vfm:realvid (Linux RealPlayer 10 RV30/40 decoder) ========================================================================== VIDEO CODEC ID: 5 ALLOCATED STREAM N. 2, type=1 Building audio filter chain for 8000Hz/1ch/s16le -> 0Hz/0ch/??... [libaf] Adding filter dummy [dummy] Was reinitialized: 8000Hz/1ch/s16le [dummy] Was reinitialized: 8000Hz/1ch/s16le Couldn't find wav tag for specified codec, exit Exiting... P.P.S. Crossposted to mencoder-users although I am told now that that mailing list is moribund.