A digital video consists of a computer file called the container.
In this file we find:

• One or more video tracks. Each track is built using a Video Codec.
• One or more audio tracks. Each track is built using an Audio Codec.
• Possibly, one or more subtitles. Each subtitle is built in a subtitle format.
• Possibly, a definition of chapters.

Limitations :

• ffDiaporama does not manage either subtitles or definitions of chapters.
• ffDiaporama generates files that include a single video track and a single audio track.

The following table lists the video codecs which ffDiaporama can use to generate videos:

Codec	Name	WIKIPEDIA/Remark
MPJEP	Motion JPEG	http://en.wikipedia.org/wiki/Motion_JPEG
MPEG2	MPEG-2 video	http://en.wikipedia.org/wiki/MPEG-2
MPEG4	DivX/XVid/MPEG-4	http://en.wikipedia.org/wiki/Xvid
H264HQ	High Quality H.264 AVC/MPEG-4 AVC	http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC Remark : ffDiaporama uses two preset h264 codecs specifically designed for this program. They contain different combinations of h264 parameters: High Quality for "Home Cinema" devices and "Phone Quality" for mobile devices. (Both preset files are placed in the same directory as the binary of ffDiaporama.)
H264PQ	Phone Quality H.264 AVC/MPEG-4 AVC
VP8	WebP (WebM-VP8)	http://en.wikipedia.org/wiki/WebP
H263	Sorenson H.263	http://en.wikipedia.org/wiki/H.263
THEORA	Theora VP3	http://en.wikipedia.org/wiki/Theora

The following table lists the audio codecs which ffDiaporama can use to generate videos:

Codec	Name	WIKIPEDIA
PCM	WAV / PCM signed 16-bit little-endian	http://en.wikipedia.org/wiki/Pulse-code_modulation
MP3	MPEG-1/2 Audio Layer III	http://en.wikipedia.org/wiki/MP3
AAC-LC	Advanced Audio Codec	http://en.wikipedia.org/wiki/Advanced_Audio_Coding
AC3	Dolby Digital	http://en.wikipedia.org/wiki/Dolby_Digital
VORBIS	Vorbis	http://en.wikipedia.org/wiki/Vorbis
MP2	MPEG-1 Layer II	http://en.wikipedia.org/wiki/MPEG-2
AMR	Adaptive Multi-Rate	http://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec

The following table lists the containers which ffDiaporama can use to generate videos, as well as the available audio and video codecs for every container:

Extension	Nom	Codecs vidéo	Codecs Audio	WIKIPEDIA
3GP	3GP	MPEG4, H264HQ/H264PQ	AMR	http://en.wikipedia.org/wiki/3GP_and_3G2
AVI	Audio Video Interleave	MJPEG, MPEG2, MPEG4, H264HQ/H264PQ	PCM, MP2, MP3, AAC, AC3	http://en.wikipedia.org/wiki/Audio_Video_Interleave
MKV	Matroska file format	MPEG4, H264HQ/H264PQ, THEORA	PCM, MP3, AAC, AC3, VORBIS	http://en.wikipedia.org/wiki/Matroska
MJPEG	Motion JPEG	MJPEG	PCM	http://en.wikipedia.org/wiki/Motion_JPEG
MP4	MPEG-4 Part 14	MPEG4, H264HQ/H264PQ	MP3, AAC	http://en.wikipedia.org/wiki/MPEG-4_Part_14
MPEG	MPEG program stream	MPEG2	MP2	http://en.wikipedia.org/wiki/MPEG_program_stream
WEBM	WebM	VP8	VORBIS	http://en.wikipedia.org/wiki/WebM
FLV	Flash file format 2005	H263	MP3	http://en.wikipedia.org/wiki/Adobe_Flash
	Flash file format 2008	H264HQ/H264PQ	AAC
OGV	Ogg	THEORA	VORBIS	http://en.wikipedia.org/wiki/Ogg