Group items tagged

"I've got a Panasonic HC-V750 camcorder which supports AVCHD and MP4. The highest quality AVCHD settings are called "1080/60p", while the highest quality MP4 settings are called "1080/50M" (also at 60p). Both are 1920x1080 full HD resolution.   When I check out some sample files recorded in those 2 formats with MediaInfo, I see the AVCHD bitrate is variable and seems to be in the 22.8 - 25.0 mbps range, while the MP4 bitrate is close to the advertised "50M" at a variable 45.4 - 49.2 mbps.   So, although I know the answer is a bit subjective, I am interested in which format people think has better video quality.  By bitrate and file size alone, I would be inclined to say MP4 in this scenario.  But the instruction manual implies that the AVCHD is better quality.   FYI: on the audio side, the AVCHD has AC3 384 kbps 6 channel audio, while the MP4 has AAC 128 kbps 2 channel, so the AVCHD AC3 audio clearly seems superior."

"Share Your Stories in Your Own Photobook Bring your Photos to Life with Stories Free to Make & Publish books Online Bookstore Quality Books, Buy One or Many No Software, Easy Book Builder, 100% Online Easy-to-use templates or Create you own design Choice of elegant Hardcover formats, ideal for photobooks"

"One of the biggest issues concerning UHD/4K is how it will be encoded/compressed and what bit rate will be required to convey a high-quality image. As I've written before, everyone at NAB 2014 seems to have settled on H.265 (aka HEVC or High-Efficiency Video Coding) as the codec of choice for UHD/4K. HEVC is said to offer up to 50 percent greater efficiency than H.264 (aka AVC or Advanced Video Coding), which is often used for high-def content, and even greater gains in efficiency over MPEG-2.   So I was particularly interested in a presentation called "Bit Rate Requirements for HEVC: Comparing H.265, H.264, and MPEG-2" by John Pallett, Director of Product Marketing for Enterprise Products at Telestream, a company that provides video capture, encoding, transcoding, and network-based delivery. The testing he discussed was based on SD and HD content, not UHD, but the findings should apply similarly."