[FFmpeg-user] Fmp4 overhead vs ADTS/AAC

Hi all, I was curious about the best way to calculate the overhead of an fmp4 file vs ADTS. The fmp4 will just contain audio. I tried calculating the size of the ftyp, moov and subsequent moof and sidx boxes but that seems like it’s not enough. Is a portion of mdat overhead as well? If so,

[FFmpeg-user] Fmp4 overhead vs ADTS/AAC

Hi all, I was curious about the best way to calculate the overhead of an fmp4 file vs ADTS. The fmp4 will just contain audio. I tried calculating the size of the ftyp, moov and subsequent moof and sidx boxes but that seems like it’s not enough. Is a portion of mdat overhead as well? If so,

[FFmpeg-user] Hls Variable Substitution

Hi, I was curious if ffmpeg has plans to support hlsv8 generation. The ability to do variable substitution in manifest is huge and can really help reduce manifest sizes. Ronak Sent from my iPhone ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] fMP4 generation speed

Sent from my iPhone > On Jun 22, 2018, at 5:03 PM, Carl Zwanzig wrote: > >> On 6/22/2018 1:37 PM, Ronak wrote: >> We have audio files that are more than 100 hours long, and we need them >> to be fragmented quickly. It totally seems like there's an I/O problem >> here because fragmentation is

[FFmpeg-user] Stable Fmp4 fragmentation

Hi, We are considering using fMP4 assets to power our new audio only streaming. One of our big requirements is to have the ability to deterministically clip the streams at the proper aac frame boundaries. I've noticed that ffmpeg has been getting more stable in how it fragments the source

Re: [FFmpeg-user] Stable Fmp4 fragmentation

Sorry I realized I sent you an mpeg ts example below, but I’ve seen the same with fmp4. This tells me that the logic that decides how to fragment the segments is independent of the file format. Sent from my iPhone > On Jun 21, 2018, at 9:09 AM, Ronak Patel > wrote: > > Hi

Re: [FFmpeg-user] Adaptive Streaming between heaac and lcaac

> On Jun 21, 2018, at 9:02 AM, Ronak Patel > wrote: > > Hi, > > We are trying to setup an adaptive stream across two heaac streams and higher > order lcaac ones. > > So we’d have something like so: > > HEAACv2 44khz/32kbps > HEAACv2 44/64 > LCA

Re: [FFmpeg-user] fMP4 generation speed

Hey Carl, So I dug into this more today and I have root caused what's exactly happening here. The problematic code is this: https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/hlsenc.c#L1368 This is where the

Re: [FFmpeg-user] fMP4 generation speed

> On Jul 12, 2018, at 6:21 PM, Ronak Patel > wrote: > > Hey Carl, > > So I dug into this more today and I have root caused what's exactly happening > here. > > The problematic code is this: > https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/hlsenc.

[FFmpeg-user] Dash and Multiple Inputs

Hi, I saw this earlier post: https://lists.ffmpeg.org/pipermail/ffmpeg-user/2015-August/027951.html Which got no replies, but I have the same question now. It looks like ffmpeg still doesn’t support providing multiple input so fragmentation happens for all representations. Is there a way to

[FFmpeg-user] He aac sampling rate and time stamps

Hello, I’m encoding my wav files to HE AAC v2 in 44kHz/32 Kbps and 44/64. Ffprobe is correctly showing that the audio is HE AAC v2 stereo with the correct sampling rate and nitrate. When I open the audio in Exoplayer or Apple’s AVURLAsset code, they report that the sampling rate is 22050kHz

Re: [FFmpeg-user] iOS/watchOS/tvOS/macOS Frameworks

> On Dec 20, 2018, at 1:03 AM, Taner Sener wrote: > > On Wed, 19 Dec 2018 at 19:08, Ronak > wrote: >> >> Therefore, I'm trying to find out the best way to convert the Ffmpeg > .dylibs to .frameworks. >> >> I tried to just package the .dylibs (rename it) and make a .framework > manually, but

Re: [FFmpeg-user] MP4 -> ADTS Headers

> On Oct 3, 2019, at 5:27 PM, Carl Eugen Hoyos wrote: > > Am Do., 3. Okt. 2019 um 06:49 Uhr schrieb Ronak via ffmpeg-user > : >> I’m writing a C++ program to validate the integrity of a Fragmented MP4 file >> containing AAC audio. > > Note that when using the library, the libav-user mailing