All the format options (bitrate, codecs, buffer sizes) are then set automatically.

v number Set the logging verbosity level. metadata key = value Set a metadata key/value pair.įor example, for setting the title in the output file:įfmpeg -i in.avi -metadata title='my title' out.flv Specifying a positive offset means that the corresponding streams are delayed by 'offset' seconds. The offset is added to the timestamps of the input files. This option affects all the input files that follow it. itsoffset offset Set the input time offset in seconds. ss position Seek to given time position in seconds. t duration Restrict the transcoded/captured video sequence to the duration specified in seconds. i filename input file name -y Overwrite output files. loglevel is a number or a string containing one of the following values: quiet panic fatal error warning info verbose debug Main options -f fmt Force format. loglevel loglevel Set the logging level used by the library. filters Show available libavfilter filters. The fields preceding the codec names have the following meanings: D Decoding available E Encoding available V/A/S Video/audio/subtitle codec S Codec supports slices D Codec supports direct rendering T Codec can handle input truncated at random locations instead of only at frame boundaries -bsfs Show available bitstream filters. The fields preceding the format names have the following meanings: D Decoding available E Encoding available -codecs Show available codecs. OPTIONS Generic options These options are shared amongst the ff* tools.

The format option may be needed for raw input files.īy default, FFmpeg tries to convert as losslessly as possible: It uses the same audio and video parameters for the outputs as the one specified for the inputs. * To force the frame rate of the input file (valid for raw formats only) to 1 fps and the frame rate of the output file to 24 fps:įfmpeg -r 1 -i input.m2v -r 24 output.avi * To force the frame rate of the output file to 24 fps: * To set the video bitrate of the output file to 64kbit/s: Each occurrence is then applied to the next input or output file. Therefore, order is important, and you can have the same option on the command line multiple times. DESCRIPTION As a general rule, options are applied to the next specified file. NAME ffmpeg - FFmpeg video converter SYNOPSIS ffmpeg ].

Ffmpeg extract frames from vob