<table border="1"> <tr> <th>Filename</th> <th>Resolution</th> <th>Bitrate</th> <th>Source</th> </tr> <tr> <td><a href="https://media.xiph.org/derf/foreman_cif_h263.avi">foreman_cif_h263.avi</a></td> <td>352x288</td> <td>~384 kbps</td> <td>Xiph Derf</td> </tr> <tr> <td><a href="https://media.xiph.org/derf/mother_daughter_cif.y4m">mother_daughter_cif.y4m</a> (Convert to H.263)</td> <td>352x288</td> <td>Raw</td> <td>Reference</td> </tr> <tr> <td><a href="ftp://vqeg.its.bldrdoc.gov/HDTV/samples/h263/">VQEG_H263_64k.3gp</a></td> <td>176x144</td> <td>64 kbps</td> <td>VQEG Standard</td> </tr> </table>
A popular resource for developers, LearningContainer offers various sample video files in multiple formats, including legacy codecs, for application testing.
If you need sample files for testing or research, these sources provide reliable downloads:
Before H.263, the H.261 standard pioneered the concept of digital video compression for ISDN lines. H.263 evolved these concepts to function on even more restricted networks, such as the , where bandwidth was severely limited. Key technical advancements that defined H.263 include:
ffmpeg -i container_cif.y4m -c:v h263 -b:v 256k -g 12 -flags +aic+umv+v4mv+cbp -bf 2 sample_256k_vbr.avi ffmpeg -i container_cif.y4m -c:v h263 -b:v 512k -g 30 -flags +loop -cmp +chroma sample_512k_intra.avi ffmpeg -i container_cif.y4m -c:v h263 -b:v 128k -r 10 -g 10 -an sample_128k_lowframe.avi