@@ -56,31 +56,37 @@ See also the @ref{framecrc} muxer.

 @anchor{framecrc}

 @section framecrc

-Per-frame CRC (Cyclic Redundancy Check) testing format.

+Per-packet CRC (Cyclic Redundancy Check) testing format.

-This muxer computes and prints the Adler-32 CRC for each decoded audio

-and video frame. By default audio frames are converted to signed

+This muxer computes and prints the Adler-32 CRC for each audio

+and video packet. By default audio frames are converted to signed

 16-bit raw audio and video frames to raw video before computing the

 CRC.

 The output of the muxer consists of a line for each audio and video

-frame of the form: @var{stream_index}, @var{frame_dts}, @var{frame_pts}, @var{frame_duration},

-@var{frame_size}, 0x@var{CRC}, where @var{CRC} is a hexadecimal

-number 0-padded to 8 digits containing the CRC of the decoded frame.

+packet of the form:

+@example

+@var{stream_index}, @var{packet_dts}, @var{packet_pts}, @var{packet_duration}, @var{packet_size}, 0x@var{CRC}

+@end example

-For example to compute the CRC of each decoded frame in the input, and

-store it in the file @file{out.crc}:

+@var{CRC} is a hexadecimal number 0-padded to 8 digits containing the

+CRC of the packet.

+

+For example to compute the CRC of the audio and video frames in

+@file{INPUT}, converted to raw audio and video packets, and store it

+in the file @file{out.crc}:

 @example

 ffmpeg -i INPUT -f framecrc out.crc

 @end example

-You can print the CRC of each decoded frame to stdout with the command:

+To print the information to stdout, use the command:

 @example

 ffmpeg -i INPUT -f framecrc -

 @end example

-You can select the output format of each frame with @command{ffmpeg} by

-specifying the audio and video codec and format. For example, to

+With @command{ffmpeg}, you can select the output format to which the

+audio and video frames are encoded before computing the CRC for each

+packet by specifying the audio and video codec. For example, to

 compute the CRC of each decoded input audio frame converted to PCM

 unsigned 8-bit and of each decoded input video frame converted to

 MPEG-2 video, use the command: