I'm using an instance of ffmpeg to capture HDV video, saving it both in raw .m2t format and simultaneously re-encoding and saving it in another lower resolution format. I'd like to live-stream the low-res version as well, and I can use another output of ffmpeg as a source to ffserver. Does anyone know if ffserver can stream a feed like this without re-encoding?
There's no info in the documentation on this, and it would seem silly if ffserver has to re-encode the feed if it's already in the right format. I'm going for reliability of recording here, and I don't want to overload the machine with unnecessary work. There was a previous discussion on this, but I don't know whether the feature ever got implemented: http://ffmpeg-users.933282.n4.nabble.com/how-to-use-videocodec-copy-for-ffserver-tt4658013.html The documentation for the Stream Section of the ffserver config file says /"The following options are recognized within a Stream section. Encoding options are marked with the encoding tag, and they are used to set the encoding parameters, and are mapped to libavcodec encoding options. Not all encoding options are supported, in particular it is not possible to set encoder private options. In order to override the encoding options specified by ffserver, you can use the ffmpeg override_ffserver commandline option. Only one of the Feed and File options should be set. Feed feed_name Set the input feed. feed_name must correspond to an existing feed defined in a Feed section. When this option is set, encoding options are used to setup the encoding operated by the remote ffmpeg process. File filename Set the filename of the pre-recorded input file to stream. When this option is set, encoding options are ignored and the input file content is re-streamed as is."/ So, it's clear that when streaming a file ffserver doesn't bother doing any re-encoding, but it's not clear exactly what's happening when streaming a feed, and whether it's possible to do this without re-encoding. Is it the case that the encoding is *always* done by "the remote ffmpeg process", in which case is it possible to just leave the codec(s) unspecified to achieve what I want to do? Or if I set the codec options to match exactly what is coming from a manually started instance of ffmpeg, will this avoid any re-encoding? -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/ffserver-Streaming-Without-Re-encoding-tp4667537.html Sent from the FFmpeg-users mailing list archive at Nabble.com. _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
