Hi there. What I want to do is to encode video for a mobile phone. I have a file that's been produced by the phone in question. Here's the output from 'mplayer -identify', and as I presume that the phone can play videos of this format, that's what I want to have. Player 1.0rc2-4.3.3 (C) 2000-2007 MPlayer Team CPU: Intel(R) Pentium(R) 4 CPU 3.20GHz (Family: 15, Model: 3, Stepping: 4) CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled with runtime CPU detection. Playing 091115_142746_M.3gp. ISO: File Type Major Brand: 3GPP Profile 5 Quicktime/MOV file format detected. ID_VIDEO_ID=0 [mov] Video stream found, -vid 0 ID_AUDIO_ID=1 [mov] Audio stream found, -aid 1 VIDEO: [avc1] 864x480 24bpp 30.303 fps 0.0 kbps ( 0.0 kbyte/s) ID_FILENAME=091115_142746_M.3gp ID_DEMUXER=mov ID_VIDEO_FORMAT=avc1 ID_VIDEO_BITRATE=0 ID_VIDEO_WIDTH=864 ID_VIDEO_HEIGHT=480 ID_VIDEO_FPS=30.303 ID_VIDEO_ASPECT=0.0000 ID_AUDIO_FORMAT=mp4a ID_AUDIO_BITRATE=16000 ID_AUDIO_RATE=16000 ID_AUDIO_NCH=2 ID_LENGTH=5.57 [ ... ] What I have is a video from a compact digital camera. mplayer -identify says: Playing CIMG3163.MOV. ISO: File Type Major Brand: Original QuickTime Quicktime/MOV file format detected. ID_VIDEO_ID=0 [mov] Video stream found, -vid 0 ID_AUDIO_ID=1 [mov] Audio stream found, -aid 1 VIDEO: [avc1] 640x480 24bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s) ID_FILENAME=CIMG3163.MOV ID_DEMUXER=mov ID_VIDEO_FORMAT=avc1 ID_VIDEO_BITRATE=0 ID_VIDEO_WIDTH=640 ID_VIDEO_HEIGHT=480 ID_VIDEO_FPS=25.000 ID_VIDEO_ASPECT=0.0000 ID_AUDIO_FORMAT=285242221 ID_AUDIO_BITRATE=0 ID_AUDIO_RATE=22050 ID_AUDIO_NCH=1 ID_LENGTH=18.04 [ ... ] Heres an mencoder command that I played around with: mencoder CIMG3163.MOV -ovc lavc -lavcopts vcodec=libx264 -vf expand=864:480,scale=864:-2 -oac lavc -lavcoptsacodec=adpcm_ima_wav -af resample=8000 -srate 8000 -o test.3gp -ofps 12 -lavfopts format=mov The phone does not play the movie from the digital camera without modification. If anyone could give me pointers ... Differences between the videos include: - Width --> black bars on the sides are fine. - FPS --> target is 30 - Audio format --> target is mp4a - Audio bitrate -- 16000 vs 22050 - Audio nch (number of channesl?) --> 2 Any pointers, ideas? Thanks already. Cheers, Benjamin.
