The Rendobar Blog
Build with the Rendobar API. FFmpeg jobs, video composition, compression, captions, image generation and MCP agents. Production-ready code.
Run FFmpeg 9.0 through one API call. Send the command you would run locally, pass any input, and get back every file it writes, with no server to manage.
Compare Rendobar and Creatomate for JSON video: per-second billing against pixel credits, about $1 a minute of 1080p on Essential, and one edit in both formats.
Compare what 7 JSON video APIs charge for 10, 100 and 1,000 minutes of video a month, from pay as you go to annual plans. Prices checked 2026-10-20.
Compare Rendobar and JSON2Video for JSON video: $0.04 a minute against 20 to 42 cents, scenes against tracks, and free renders that carry no watermark.
Compare Rendobar and Shotstack for JSON video: $0.04 a minute against 20 cents pay as you go, feature by feature, and the same edit written in both formats.
Caption a video with animated word-by-word styles in one API call. See three presets on one clip, the FFmpeg ASS karaoke route, and where it breaks.
Get a video under Discord's 20 MB free upload limit with the two-pass bitrate formula, see why one CRF guess misses, and cap the size in one API call.
Get a vertical phone video under WhatsApp's 16 MB media limit as H.264 and AAC, keep it 9:16, and meet the Business API's stricter codec rules.
Compare self-hosted FFmpeg, a template API and an FFmpeg API that also runs timelines, on one real edit with measured render time and cost per run.
Render an 18 second 1080p MP4 from one JSON timeline with a crossfade, titles and music, and see the FFmpeg filter graph the same edit needs.
Compare 13 video processing APIs on delivering output to a bucket you own. Three can write to S3 through an IAM role, and five document no delivery at all.
Send job outputs to your S3 bucket through an IAM role a service assumes, with no access key to leak and access revoked by deleting one stack.
Run FFmpeg, compression and captions on n8n Cloud with the verified Rendobar node, installed from the nodes panel, with long jobs parked on a Wait node.
Learn why an S3 presigned URL dies before its expiry when a role session signed it, and why the failure arrives as a 400 ExpiredToken, not a 403.
Generate a thumbnail for every video that lands in S3 without the black first frame. Seek in, size the JPEG for its slot, and key each job on the ETag.
Process video in S3 with FFmpeg by reading a presigned URL and piping the result back, then see what changes when an encode outlives Lambda's 900 seconds.
Send FFmpeg output to an S3 bucket by piping a fragmented MP4 into aws s3 cp. A regular MP4 can't stream, and MPEG-TS cost 7.5% more bytes.
Add the Rendobar piece to Activepieces, connect an API key, and build a flow that compresses a video and posts the link while the flow sleeps.
Convert a file size target into FFmpeg settings with the two-pass formula or a CRF search, and see how little already-encoded video shrinks.
Compare what 6 FFmpeg APIs charge for one stated workload of 400 short clips a month, then watch the ranking flip on large files. Prices checked 2026-09-26.
Render SRT or ASS captions into the picture with FFmpeg, with the escaping a subtitles= path or URL needs, force_style keys, and when to keep them soft.
Compare the FFmpeg settings that change output size, measured on one file: preset, keyframe interval, CRF, tune, scaler and pixel format, ranked by effect.
Watermark a video with FFmpeg using an image or text, with corner positions, logo sizing relative to the frame, and why overlay under -vf always fails.
Probe a media file with the five ffprobe commands that cover most jobs, each shown with the output ffprobe 8.0 prints, from one field to the full JSON.
Compare 6 free FFmpeg API tiers by what they let you run before paying: runtime caps, input size caps, card checks and trimmed output. Checked 2026-09-26.
Build an n8n AI Agent that runs FFmpeg jobs as tools, checks its balance before it spends, and reads the real FFmpeg error when a job fails.
Compare AV1, HEVC, VP9 and H.264 on one file. Held to one 150 KB budget, AV1 scored VMAF 84.8 against H.264's 64.3. Encode time and cost per codec too.
Compare the 4 kinds of video processing API, raw FFmpeg, timeline, video platform and batch transcoder, by what you send and how each one bills.
Compare 11 FFmpeg APIs by runtime cap, billing unit and toolchain, then rerun the one measured job with its IDs yourself. Prices checked 2026-09-27.
