I have some .ts (transport stream) files that contain video and 5.1 audio but XBMC will only play them in stereo. It appears that the only type of file that XBMC will play in full 5.1 is an ac3 file, so my thought was to try converting the files using ffmpeg.
My original approach was to use: ffmpeg -i "originalfile.ts" -c:v copy -c:a ac3 "new.ts" This did create an ac3 file but with only two channels. After reading a bit more, I tried adding the -ac 6 switch, so it became: ffmpeg -i "originalfile.ts" -c:v copy -c:a ac3 -ac 6 "new.ts" This created a file that XBMC thinks is a Dolby 5.1 file (according to the on-screen display) but in fact the only audio present is on the stereo channels. The source is definitely in MPEG-TS and it contains 5.1 information, although I'm confused as to how. One of the files is actually a speaker test video and if played in a different program (such as MythTV) it plays the "Left", "Right" and "Center" channels from those speakers, but the "Left Surround" and "Right Surround" audio comes from both the front and rear speakers of the specified channel, with a bit more emphasis on the rear. If played in XBMC it plays from the front speakers only. Yet if I attempt to display the properties in a program like iMediaHUD it only shows two stereo tracks that look like this: Audio #1 Count : 222 Count of stream of this kind : 2 Kind of stream : Audio Stream identifier : 1 StreamOrder : 0-1 ID : 64 (0x40) Menu ID : 137 (0x89) Format : MPEG Audio Commercial name : MPEG Audio Format version : Version 1 Format profile : Layer 2 Internet media type : audio/mpeg Codec ID : 3 Codec : MPEG-1 Audio layer 2 Duration : 00:01:06.624 Bit rate mode : Constant Bit rate : 256 Kbps Channel(s) : 2 channels Sampling rate : 48.0 KHz Samples count : 3197952 Frame count : 2776 Compression mode : Lossy Delay : 00:00:00.268 Delay, origin : Container Delay relative to video : -15 Video0 delay : -15 Stream size : 2.03 MiB (1%) Proportion of this stream : 0.00603 Language : en Audio #2 Count : 222 Count of stream of this kind : 2 Kind of stream : Audio Stream identifier : 2 StreamOrder : 0-2 ID : 65 (0x41) Menu ID : 137 (0x89) Format : MPEG Audio Commercial name : MPEG Audio Format version : Version 1 Format profile : Layer 2 Format settings : Intensity Stereo + MS Stereo Mode extension : Intensity Stereo + MS Stereo Internet media type : audio/mpeg Codec ID : 3 Codec : MPEG-1 Audio layer 2 Duration : 00:01:06.648 Bit rate mode : Constant Bit rate : 256 Kbps Channel(s) : 2 channels Sampling rate : 48.0 KHz Samples count : 3199104 Frame count : 2777 Compression mode : Lossy Delay : 00:00:00.255 Delay, origin : Container Delay relative to video : -28 Video0 delay : -28 Stream size : 2.03 MiB (1%) Proportion of this stream : 0.00603 Language : en I have no idea how they are encoding the 5.1 but I can assure you it's there, and all I want to do is use ffmpeg to convert it and similar files to ac3 so XBMC will play them in 5.1. Can anyone tell me what I am doing wrong? _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
